CN104572485B - The distribution method and device of dual system common memory - Google Patents
The distribution method and device of dual system common memory Download PDFInfo
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- CN104572485B CN104572485B CN201510045210.7A CN201510045210A CN104572485B CN 104572485 B CN104572485 B CN 104572485B CN 201510045210 A CN201510045210 A CN 201510045210A CN 104572485 B CN104572485 B CN 104572485B
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Abstract
The invention discloses a kind of distribution methods of dual system common memory, include the following steps：Determine the operating system for being currently at running background as the first operating system；Obtain the internal storage data that is of little use of first operating system；The internal storage data that is of little use of first operating system is stored into preset compressed storage area in a compressed format.The invention also discloses a kind of distributors of dual system common memory.Present invention decreases the memory headroom that the operating system of running background occupies, the problem of the effective solution insufficient space of dual system common memory.
Description
Technical field
The present invention relates to dual system technical field of data processing more particularly to the distribution methods and dress of dual system common memory
It sets.
Background technology
Currently, during the use of mobile terminal, in order to which expansion system is to the compatibility of application software, need to move
Terminal loads two different operating systems simultaneously；Alternatively, in order to increase user experience, meet the need that user attempts new system
It asks, it is also desirable to which mobile terminal is loaded into two operating systems simultaneously；Or the stabilization for system, avoid an operating system from collapsing
The problem of cannot be started up after bursting can load two operating systems in mobile terminal；Alternatively, in order to improve the safety of system
Can, two independently operated operating systems need to be loaded to improve the security performance of system in mobile terminal.
The mobile terminal of dual system runs two operating systems using more and more extensive simultaneously in same mobile terminal
When, the two operating system common memories, when the first operating system is in front stage operation, the first operating system can occupy one
Divide memory headroom.When terminal switches to the second operating system from the first operating system, the first operating system can enter backstage and transport
Row, because the first operating system can be switched back at any time, the memory headroom that the first operating system occupies can't be released, and be caused
Second operating system can only use the part memory headroom not occupied by the first operating system so that the second operating system
Available memory space is considerably less.And when terminal switches back into the first operating system from the second operating system, second operation system
The memory headroom that system occupies will not be released.And operating system is always more and more with using to the occupancy of memory, with
The multiple switching between two operating systems, the case where low memory of terminal can be increasingly severe, or even will appear two
The case where operating system plunder memory headroom, occurs.In the case of the memory headroom of current intelligent terminal universal very little, backstage
The memory that the operating system of operation occupies will not be released, and the memory headroom of the dual system common memory in turn resulted in is insufficient to ask
Topic is especially apparent.
The above is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that the above is existing skill
Art.
Invention content
The main purpose of the present invention is to provide a kind of distribution methods and device of dual system common memory, it is intended to solve double
The problem of the memory headroom deficiency of system common memory.
To achieve the above object, the present invention provides a kind of distribution method of dual system common memory, includes the following steps：
Determine the operating system for being currently at running background as the first operating system；
Obtain the internal storage data that is of little use of first operating system；
The internal storage data that is of little use of first operating system is stored in a compressed format and arrives preset compressed storage area
It is interior.
Preferably, described to store the internal storage data that is of little use of first operating system to preset in a compressed format
After step in compressed storage area, further include：
When receiving system switching command, determine the operating system for being currently at front stage operation as the second operation system
System；
Second operating system is switched into running background, and first operating system is switched into front stage operation.
Preferably, described that second operating system is switched into running background, and first operating system is switched
To after the step of front stage operation, further include：
The internal storage data that is of little use of first operating system is obtained out of described compressed storage area, and described first is grasped
Make to be written and read in the internal storage data storage to the available storage area other than the compressed storage area that is of little use of system；
Obtain the internal storage data that is of little use of second operating system, and by the memory that is of little use of second operating system
Data are stored into preset compressed storage area in a compressed format.
Preferably, the determination was currently at before the step of operating system of running background is as the first operating system,
Further include：
The partial memory space of common memory is set as compressed storage area；
Memory headroom in common memory in addition to compressed storage area is set as available storage area.
Preferably, the step of memory headroom by common memory in addition to compressed storage area is set as available storage area
Before, further include：
10% memory headroom of common memory is set as compressed storage area.
In addition to achieve the above object, the present invention also provides a kind of common memory distributors of dual system, including：
Determining module, for determining the operating system for being currently at running background as the first operating system；
Acquisition module, the internal storage data that is of little use for obtaining first operating system；
Memory module, for being stored the internal storage data that is of little use of first operating system in a compressed format to default
Compressed storage area in.
Preferably, the distributor of the dual system common memory further includes handover module；
The determining module is additionally operable to when receiving system switching command, determines the operation for being currently at front stage operation
System is as the second operating system；
The handover module for second operating system to be switched to running background, and described first is operated and is
System switches to front stage operation.
Preferably, the memory module is additionally operable to obtain first operating system out of described compressed storage area not
Common internal storage data, and by first operating system be of little use internal storage data storage to other than the compressed storage area can
With being written and read in memory block；
The memory module, is additionally operable to obtain the internal storage data that is of little use of second operating system, and by described second
The internal storage data that is of little use of operating system is stored into preset compressed storage area in a compressed format.
Preferably, the distributor of the dual system common memory further includes memory allocating module；
The memory allocating module, for the partial memory space of common memory to be set as compressed storage area；
The memory allocating module is additionally operable to the memory headroom in common memory in addition to compressed storage area being set as available
Memory block.
Preferably, the memory allocating module is additionally operable to 10% memory headroom of common memory being set as compression storage
Area.
The present invention by being stored in compression storage in a compressed format by the data that are of little use of the operating system of running background
In area, the memory headroom that the operating system of running background occupies, the effective solution space of dual system common memory are reduced
Insufficient problem.
Description of the drawings
Fig. 1 is the flow diagram of the first embodiment of the distribution method of dual system common memory of the present invention；
Fig. 2 is the flow diagram of the second embodiment of the distribution method of dual system common memory of the present invention；
Fig. 3 is the flow diagram of an embodiment of present invention setting memory block；
Fig. 4 is the high-level schematic functional block diagram of the preferred embodiment of the distributor of dual system common memory of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment is described further with regard to technical scheme of the present invention.It should be appreciated that this
The described specific embodiment in place is only used to explain the present invention, is not intended to limit the present invention.
The present invention provides a kind of distribution method of dual system common memory.
Referring to Fig.1, Fig. 1 is the flow diagram of the first embodiment of the distribution method of dual system common memory of the present invention.
It is emphasized that：Flow chart shown in Fig. 1 is only a preferred embodiment, and those skilled in the art appoints when knowing
What should not all be detached from the range covered in following technical solution around the embodiment of inventive concept structure：
Determine the operating system for being currently at running background as the first operating system；Obtain first operating system
Be of little use internal storage data；The internal storage data that is of little use of first operating system is stored in a compressed format and arrives preset compression
In memory block.
It is the specific steps for the distribution method that dual system common memory is done step-by-step in the present embodiment below：
Step S10 determines the operating system for being currently at running background as the first operating system；
Execute the distribution method of dual system common memory of the present invention main body can for smart mobile phone, personal digital assistant,
The mobile terminals such as tablet, it is preferred that be the dual system mobile terminal of common memory.The dual system termi-nal of the common memory, can
By sharing identical hardware device, two operating systems are loaded in the virtual level of carrying；It can also share including interior presence
Interior fractional hardware loads two operating systems.Such as：The dual system termi-nal of the common memory, the first operating system and
Two operating systems possess the hardware devices such as respective processor, bus respectively, and share screen, input-output equipment, wirelessly penetrate
Frequency equipment and storage device, these shared devices are operated with first operating system and second respectively by multidiameter option switch
The bus of system connects.The shared device and the first operating system and the second operating system are controlled by multidiameter option switch
Connection keeps the connection of the processor and rambus of two systems with common memory, by the screen, input-output equipment,
The bus of the operating system of wireless radios and front stage operation connects, and disconnects the screen, input-output equipment, wirelessly penetrates
The bus of frequency equipment and the operating system of running background connects, so that the operating system of front stage operation monopolizes the screen, defeated
Enter output equipment, wireless radios.
The operating system can be Android (Android system, Google and open mobile phone alliance joint development
Mobile device operation system), Windows Phone (WP systems, Microsoft exploitation mobile phone operating system), IOS (apple movement set
Standby operating system, the Mobile operating system of Apple Inc.'s exploitation) or Tizen (Tai Ze, the shifting of Samsung and Intel's joint development
Dynamic operating system).The dual system can be two identical operating systems, can also be two different operating systems, example
Such as：Two identical operating systems are loaded in same terminal, wherein the operations such as the first operating system is for paying, password authentification,
Second operating system is used to entertain, communicate etc. operations, two systems independent operating and improves the safety of system；Alternatively, for
Extended software compatibility considers, loads two different operating systems in same terminal so that terminal, which can load, more answers
Use software.
Can determine the operating system for being currently at running background as first when the mobile terminal-opening starts
Operating system；Can also be to determine the operating system for being currently at running background as the first operation in net system switching process
System.
Step S20 obtains the internal storage data that is of little use of first operating system；
The internal storage data of first operating system is divided into common internal storage data and the internal storage data that is of little use, described first
Operating system internal storage data necessary to the silent operation in backstage is common internal storage data, and first operating system is quiet on backstage
The internal storage data of silent operation institute necessarily is the data that are of little use.The frequently-used data of first operating system presses traditional storage side
Formula is stored.The internal storage data that is of little use of first operating system will not when first operating system is in running background
It can be called by system, being of little use for first operating system can be just called when first operating system is in front stage operation
Internal storage data.After determining the operating system for being currently at running background as the first operating system, from being total to for the dual system
With depositing the internal storage data that is of little use for obtaining first operating system in interior.
The internal storage data that is of little use of first operating system is stored and arrives preset pressure by step S30 in a compressed format
In contracting memory block；
The internal storage data that is of little use of first operating system is stored in preset compressed storage area in a compressed format
It is interior, since the internal storage data that is of little use of first operating system can't be called in running background by system, by its into
Row compression storage can effectively reduce the memory headroom that the operating system of running background occupies.And first operating system
Common internal storage data is then stored in the available storage area other than the compressed storage area by traditional storage mode and is written and read.
Preferably, the partial memory space of common memory is set as compressed storage area.The compressed storage area is in a compressed format
Storage is currently at the data that are of little use of the operating system of running background；The reading and writing data of the compressed storage area can by
Integrated data compressed and decompressed function module realizes compression and decompression on the Memory Controller Hub of the compressed storage area.It is interior
The data that are of little use for the compression that memory controller is obtained by rambus from physical storage, directly in the data decompression
Module unzips it processing, and then obtains the data that are of little use after decompression；Likewise, the memory number that is of little use of write-in memory
After it can be compressed by the compression module, by rambus storage to compressed storage area.
The present embodiment by being stored in pressure in a compressed format by the internal storage data that is of little use of the operating system of running background
In contracting memory block, the memory headroom that the operating system of running background occupies, effective solution dual system common memory are reduced
Memory headroom deficiency problem.
It is the flow diagram of the second embodiment of the distribution method of dual system common memory of the present invention with reference to Fig. 2, Fig. 2.
The first embodiment of distribution method based on above-mentioned dual system common memory after the step S30, further includes：
Step S410 is determined when receiving system switching command and is currently at the operating system of front stage operation as the
Two operating systems；
The system switching command is that can switch to the second operation by the first operating system by hardware switch to trigger
The instruction of system；Or icon is touched by the system switching based on user interface and is switched by the first operating system to trigger
To the instruction of the second operating system；It is either automatic after the one of operating system collapse of the terminal device of the dual system
Triggering switches to the instruction of another operating system.When receiving system switching command, the behaviour for being currently at front stage operation is determined
Make system as the second operating system, determines the operating system for being currently at running background as the first operating system.
Second operating system is switched to running background, and first operating system is switched to by step S420
Front stage operation.
The determining operating system for being currently at front stage operation is currently at running background as the second operating system, determination
Operating system as the first operating system, second operating system is switched into running background, and described first is operated
System switches to front stage operation.When second operating system is switched to running background, second operating system will be adjusted only
The common internal storage data necessary to its backstage silence operation, the memory number that is of little use without recalling second operating system
According to.When first operating system is switched to front stage operation, first operating system will not only call its running background
Necessary common internal storage data, while also to call the internal storage data that is of little use of first operating system.
Step S510 obtains the internal storage data that is of little use of first operating system out of described compressed storage area, and will
It is read in the internal storage data storage to the available storage area other than the compressed storage area that is of little use of first operating system
It writes；
When first operating system is switched to front stage operation, first operation is obtained out of described compressed storage area
The internal storage data that is of little use of system, and the internal storage data that is of little use of first operating system is stored to the compressed storage area
It is written and read in available storage area in addition.Preferably, the Memory Controller Hub of the compressed storage area is by rambus, from institute
The internal storage data that is of little use for the compressed format that first operating system is obtained in the corresponding physical memory in compressed storage area is stated, and
Data decompression module in the compressed storage area unzips it processing, and then obtains the first operating system after decompression
The internal storage data that is of little use, and the internal storage data that is of little use of the first operating system after the decompression is deposited by rambus
Storage is in the available storage area other than the compressed storage area, in order to which first operating system calls institute in front stage operation
State the internal storage data that is of little use of the first operating system.
Step S520, obtains the internal storage data that is of little use of second operating system, and by second operating system
The internal storage data that is of little use is stored into preset compressed storage area in a compressed format.
When second operating system is switched to running background, the memory number that is of little use of second operating system is obtained
According to, and the internal storage data that is of little use of second operating system is stored into preset compressed storage area in a compressed format.
Preferably, the Memory Controller Hub of the compressed storage area obtains second behaviour by rambus from the available storage area
Make the internal storage data that is of little use of system, and compression processing is carried out in the data compressing module of the compressed storage area, and then obtains
The internal storage data that is of little use of compressed second operating system, and by the memory that is of little use of compressed second operating system
Data are stored by rambus into the corresponding physical memory in the compressed storage area.
Further, before the step S10, further include：
The partial memory space of common memory is set as compressed storage area by step S110；
Memory headroom in common memory in addition to compressed storage area is set as available storage area by step S120.
Preferably, the memory headroom of the 10% of the common memory can be set to compressed storage area, is shared described
90% memory headroom of memory is set as available storage area.The available storage area is currently at front stage operation to store
The common internal storage data of operating system and the internal storage data that is of little use, and to store the operating system for being currently at running background
Common internal storage data.Preferably, the reading and writing data of the compressed storage area can pass through the memory in the compressed storage area
The compressed and decompressed function module of integrated data is compressed and decompressed to realize on controller.Memory Controller Hub by rambus from
The data that are of little use of the compression obtained on physical storage directly unzip it processing in the data decompression module, into
And obtain the data that are of little use after decompression；Likewise, the internal storage data that is of little use of write-in memory can be by the compression mould
After block is compressed, by rambus storage to compressed storage area.
The present embodiment obtains after first operating system is switched to front stage operation out of described compressed storage area
The internal storage data that is of little use of first operating system, and the internal storage data that is of little use of first operating system is stored to institute
It states and is written and read in the available storage area other than compressed storage area；The internal storage data that is of little use of second operating system is obtained,
And store the internal storage data that is of little use of second operating system into preset compressed storage area in a compressed format, reduce
Memory headroom that the operating system of running background occupies, effective solution the asking of the insufficient space of dual system common memory
Topic.
The present invention further provides a kind of common memory distributors of dual system.
With reference to the function module signal that Fig. 4, Fig. 4 are the preferred embodiment of the common memory distributor of dual system of the present invention
Figure.
In the present embodiment, the distributor of the dual system common memory includes：Determining module 10, acquisition module 20,
Memory module 30, handover module 40 and memory allocating module 50.
The determining module 10, for determining the operating system for being currently at running background as the first operating system；
The main body of the distributor of dual system common memory of the present invention can be smart mobile phone, personal digital assistant, tablet
Equal mobile terminals, it is preferred that be the dual system mobile terminal of common memory.The dual system termi-nal of the common memory, Ke Yitong
It crosses and shares identical hardware device, two operating systems are loaded in the virtual level of carrying；It can also share including memory
Fractional hardware loads two operating systems.Such as：The dual system termi-nal of the common memory, the first operating system and the second behaviour
Make system and possess the hardware devices such as respective processor, bus respectively, and shares screen, input-output equipment, less radio-frequency and set
Standby and storage device, these shared devices by multidiameter option switch respectively with first operating system and the second operating system
Bus connection.The company of the shared device and the first operating system and the second operating system is controlled by multidiameter option switch
It connects, keeps the connection of the processor and rambus of two systems with common memory, by the screen, input-output equipment, nothing
The bus of the operating system of line radio-frequency apparatus and front stage operation connects, and disconnects the screen, input-output equipment, less radio-frequency
The bus of equipment and the operating system of running background connects, so that the operating system of front stage operation monopolizes the screen, input
Output equipment, wireless radios.
The operating system can be Android (Android system, Google and open mobile phone alliance joint development
Mobile device operation system), Windows Phone (WP systems, Microsoft exploitation mobile phone operating system), IOS (apple movement set
Standby operating system, the Mobile operating system of Apple Inc.'s exploitation) or Tizen (Tai Ze, the shifting of Samsung and Intel's joint development
Dynamic operating system).The dual system can be two identical operating systems, can also be two different operating systems, example
Such as：Two identical operating systems are loaded in same terminal, wherein the operations such as the first operating system is for paying, password authentification,
Second operating system is used to entertain, communicate etc. operations, two systems independent operating and improves the safety of system；Alternatively, for
Extended software compatibility considers, loads two different operating systems in same terminal so that terminal, which can load, more answers
Use software.
Can determine the operating system for being currently at running background as first when the mobile terminal-opening starts
Operating system；Can also be to determine the operating system for being currently at running background as the first operation in net system switching process
System.
The acquisition module 20, the internal storage data that is of little use for obtaining first operating system；
The internal storage data of first operating system is divided into common internal storage data and the internal storage data that is of little use, described first
Operating system internal storage data necessary to the silent operation in backstage is common internal storage data, and first operating system is quiet on backstage
The internal storage data of silent operation institute necessarily is the data that are of little use.The frequently-used data of first operating system presses traditional storage side
Formula is stored.The internal storage data that is of little use of first operating system will not when first operating system is in running background
It can be called by system, being of little use for first operating system can be just called when first operating system is in front stage operation
Internal storage data.After determining the operating system for being currently at running background as the first operating system, from being total to for the dual system
With depositing the internal storage data that is of little use for obtaining first operating system in interior..
The memory module 30, for storing the internal storage data that is of little use of first operating system in a compressed format
Into preset compressed storage area.
The internal storage data that is of little use of first operating system is stored in preset compressed storage area in a compressed format
It is interior, since the internal storage data that is of little use of first operating system can't be called in running background by system, by its into
Row compression storage can effectively reduce the memory headroom that the operating system of running background occupies.And first operating system
Common internal storage data is then stored in the available storage area other than the compressed storage area by traditional storage mode and is written and read.
Preferably, the partial memory space of common memory is set as compressed storage area.The compressed storage area is in a compressed format
Storage is currently at the data that are of little use of the operating system of running background；The reading and writing data of the compressed storage area can by
Integrated data compressed and decompressed function module realizes compression and decompression on the Memory Controller Hub of the compressed storage area.It is interior
The data that are of little use for the compression that memory controller is obtained by rambus from physical storage, directly in the data decompression
Module unzips it processing, and then obtains the data that are of little use after decompression；Likewise, the memory number that is of little use of write-in memory
After it can be compressed by the compression module, by rambus storage to compressed storage area.
The determining module 10 is additionally operable to when receiving system switching command, determines the behaviour for being currently at front stage operation
Make system as the second operating system；
The system switching command can be to switch to the second operation by the first operating system by hardware switch to trigger
The instruction of system；Or icon is touched by the system switching based on user interface and is switched by the first operating system to trigger
To the instruction of the second operating system；It is either automatic after the one of operating system collapse of the terminal device of the dual system
Triggering switches to the instruction of another operating system.When receiving system switching command, the behaviour for being currently at front stage operation is determined
Make system as the second operating system, determines the operating system for being currently at running background as the first operating system.
The handover module 40 for second operating system to be switched to running background, and described first is operated
System switches to front stage operation.
The determining operating system for being currently at front stage operation is currently at running background as the second operating system, determination
Operating system as the first operating system, second operating system is switched into running background, and described first is operated
System switches to front stage operation.When second operating system is switched to running background, second operating system will be adjusted only
The common internal storage data necessary to its backstage silence operation, the memory number that is of little use without recalling second operating system
According to.When first operating system is switched to front stage operation, first operating system will not only call its running background
Necessary common internal storage data will also call the internal storage data that is of little use of first operating system simultaneously.
Further, the memory module 30 is additionally operable to obtain first operating system out of described compressed storage area
The internal storage data that is of little use, and by the being of little use internal storage data storage of first operating system to other than the compressed storage area
Available storage area in be written and read；
When first operating system is switched to front stage operation, first operation is obtained out of described compressed storage area
The internal storage data that is of little use of system, and the internal storage data that is of little use of first operating system is stored to the compressed storage area
It is written and read in available storage area in addition.Preferably, the Memory Controller Hub of the compressed storage area is by rambus, from institute
The internal storage data that is of little use for the compressed format that first operating system is obtained in the corresponding physical memory in compressed storage area is stated, and
Data decompression module in the compressed storage area unzips it processing, and then obtains the first operating system after decompression
The internal storage data that is of little use, and the internal storage data that is of little use of the first operating system after the decompression is deposited by rambus
Storage is in the available storage area other than the compressed storage area, in order to which first operating system calls institute in front stage operation
State the internal storage data that is of little use of the first operating system.
The memory module 30, is additionally operable to obtain the internal storage data that is of little use of second operating system, and by described
The internal storage data that is of little use of two operating systems is stored into preset compressed storage area in a compressed format.
When second operating system is switched to running background, the memory number that is of little use of second operating system is obtained
According to, and the internal storage data that is of little use of second operating system is stored into preset compressed storage area in a compressed format.
Preferably, the Memory Controller Hub of the compressed storage area obtains second behaviour by rambus from the available storage area
Make the internal storage data that is of little use of system, and compression processing is carried out in the data compressing module of the compressed storage area, and then obtains
The internal storage data that is of little use of compressed second operating system, and by the memory that is of little use of compressed second operating system
Data are stored by rambus into the corresponding physical memory in the compressed storage area.
The memory allocating module 50, for the partial memory space of common memory to be set as compressed storage area；It is additionally operable to
Memory headroom in common memory in addition to compressed storage area is set as available storage area.
Preferably, the memory headroom of the 10% of the common memory can be set to compressed storage area, is shared described
90% memory headroom of memory is set as available storage area.The available storage area is currently at front stage operation to store
The common internal storage data of operating system and the internal storage data that is of little use, and to store the operating system for being currently at running background
Common internal storage data.Preferably, the reading and writing data of the compressed storage area can pass through the memory in the compressed storage area
The compressed and decompressed function module of integrated data is compressed and decompressed to realize on controller.Memory Controller Hub by rambus from
The data that are of little use of the compression obtained on physical storage directly unzip it processing in the data decompression module, into
And obtain the data that are of little use after decompression；Likewise, the internal storage data that is of little use of write-in memory can be by the compression mould
After block is compressed, by rambus storage to compressed storage area.
The present embodiment is deposited by the way that the data that are of little use of the operating system of running background are stored in compression in a compressed format
In storage area, the frequently-used data of the frequently-used data of the operating system of running background and front stage operation and the data that are of little use are stored in pressure
In available storage area other than contracting memory block, the memory headroom that the operating system of running background occupies, effective solution are reduced
The problem of insufficient space of dual system common memory.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (8)
1. a kind of distribution method of dual system common memory, which is characterized in that include the following steps：
Determine that the operating system for being currently at running background as the first operating system, is currently at the operating system of front stage operation
For the second operating system；
The internal storage data that is of little use of first operating system is obtained, silent operation need not on backstage for first operating system
The internal storage data of palpus is the internal storage data that is of little use；
The internal storage data that is of little use of first operating system is stored into preset compressed storage area in a compressed format, in advance
If the compressed storage area domain be first operating system and second operating system common memory partial memory
Space, the internal storage data that is of little use for storing the operating system for being currently at running background in a compressed format；
When receiving system switching command, determine the operating system for being currently at front stage operation as the second operating system；
Second operating system is switched into running background, and first operating system is switched into front stage operation.
2. the distribution method of dual system common memory as described in claim 1, which is characterized in that described to be operated described second
System switches to running background, and after the step of first operating system is switched to front stage operation, further includes：
The internal storage data that is of little use of first operating system is obtained out of described compressed storage area, and is by first operation
It is written and read in the internal storage data storage to the available storage area other than the compressed storage area that is of little use of system；
Obtain the internal storage data that is of little use of second operating system, and by the internal storage data that is of little use of second operating system
In a compressed format in storage to preset compressed storage area.
3. such as the distribution method of claim 1 to 2 any one of them dual system common memory, which is characterized in that the determination
It is currently at before the step of operating system of running background is as the first operating system, further includes：
The partial memory space of common memory is set as compressed storage area；
Memory headroom in common memory in addition to compressed storage area is set as available storage area.
4. the distribution method of dual system common memory as claimed in claim 3, which is characterized in that described to be removed in common memory
Before the step of memory headroom other than compressed storage area is set as available storage area, further include：
10% memory headroom of common memory is set as compressed storage area.
5. a kind of distributor of dual system common memory, which is characterized in that including：
Determining module, for determining the operating system for being currently at running background as the first operating system；
Acquisition module, the internal storage data that is of little use for obtaining first operating system, first operating system is on backstage
Silence operation institute internal storage data necessarily is the internal storage data that is of little use；
Memory module arrives preset pressure for storing the internal storage data that is of little use of first operating system in a compressed format
In contracting memory block, the preset compressed storage area domain is that first operating system and sharing for second operating system are interior
The partial memory space deposited, the memory number that is of little use for storing the operating system for being currently at running background in a compressed format
According to；
The determining module is additionally operable to when receiving system switching command, determines the operating system for being currently at front stage operation
As the second operating system；
The handover module for second operating system to be switched to running background, and first operating system is cut
Shift to front stage operation.
6. the distributor of dual system common memory as claimed in claim 5, which is characterized in that the memory module is also used
In the internal storage data that is of little use for obtaining first operating system out of described compressed storage area, and by first operating system
The internal storage data storage that is of little use to being written and read in the available storage area other than the compressed storage area；
The memory module is additionally operable to obtain the internal storage data that is of little use of second operating system, and described second is operated
The internal storage data that is of little use of system is stored into preset compressed storage area in a compressed format.
7. such as the distributor of claim 5 to 6 any one of them dual system common memory, which is characterized in that double systems
The distributor for common memory of uniting further includes memory allocating module；
The memory allocating module, for the partial memory space of common memory to be set as compressed storage area；
The memory allocating module is additionally operable to the memory headroom in common memory in addition to compressed storage area being set as available storage
Area.
8. the distributor of dual system common memory as claimed in claim 7, which is characterized in that the memory allocating module,
It is additionally operable to 10% memory headroom of common memory being set as compressed storage area.
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