CN109508304A - A kind of processing method and processing device of memory management metadata - Google Patents
A kind of processing method and processing device of memory management metadata Download PDFInfo
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- CN109508304A CN109508304A CN201811355149.6A CN201811355149A CN109508304A CN 109508304 A CN109508304 A CN 109508304A CN 201811355149 A CN201811355149 A CN 201811355149A CN 109508304 A CN109508304 A CN 109508304A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
- G06F12/10—Address translation
- G06F12/1009—Address translation using page tables, e.g. page table structures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
- G06F12/10—Address translation
- G06F12/1027—Address translation using associative or pseudo-associative address translation means, e.g. translation look-aside buffer [TLB]
- G06F12/1036—Address translation using associative or pseudo-associative address translation means, e.g. translation look-aside buffer [TLB] for multiple virtual address spaces, e.g. segmentation
Abstract
The embodiment of the present application discloses a kind of processing method and processing device of memory management metadata, for realizing relatively efficiently handling memory management metadata, this method comprises: mmap storage allocation is called to manage metadata memory, huge page big page memory is saved as in memory management metadata；Physical address mapping table is established, physical address mapping table saves the physics frame number of the corresponding memory management metadata memory of each memory management metadata；In response to access target memory management metadata request, the physics frame number that target memory manages the corresponding memory management metadata memory of metadata is searched by physical address mapping table, to realize the access to target memory management metadata, it is that either memory manages metadata that target memory, which manages metadata,.
Description
Technical field
This application involves field of computer technology, and in particular to a kind of processing method and processing device of memory management metadata.
Background technique
Memory management refers in code operation to the distribution of device memory resource and the technology used.In storage system
In, generally one layer of memory management module can be provided again by Linux kernel module on the basis of being based on Linux memory management,
To realize the more flexible EMS memory management process such as power down protection.During the realization of this mode, many memory pipes are needed
Metadata is managed, needs to lack effectively handle this in the prior art using to memory management metadata in memory management process
The method of a little memory management metadata.
Summary of the invention
In view of this, the embodiment of the present application provides a kind of processing method and processing device of memory management metadata, with realize compared with
Efficiently to handle memory management metadata.
To solve the above problems, technical solution provided by the embodiments of the present application is as follows:
A kind of processing method of memory management metadata, which comprises
It calls mmap storage allocation to manage metadata memory, saves as huge page big page in the memory management metadata
Memory；
Physical address mapping table is established, the physical address mapping table saves the corresponding memory of each memory management metadata
Manage the physics frame number of metadata memory；
In response to access target memory management metadata request, searched in the target by the physical address mapping table
The physics frame number of the corresponding memory management metadata memory of management metadata is deposited, first number is managed to the target memory to realize
According to access, target memory management metadata is any memory management metadata.
In one possible implementation, the calling mmap storage allocation manages metadata memory, comprising:
The process for starting User space calls mmap storage allocation to manage metadata memory.
In one possible implementation, the method also includes:
Huge page memory mark is added for the memory management metadata memory.
In one possible implementation, the access target memory management metadata request is the touching when skipping leaf
Hair.
In one possible implementation, described that the target memory management is searched by the physical address mapping table
The physics frame number of the corresponding memory management metadata memory of metadata, to realize the visit to target memory management metadata
It asks, comprising:
The target memory, which is searched, by the physical address mapping table manages the corresponding memory management metadata of metadata
The physics frame number of memory；
Determine the corresponding memory physical address of the physics frame number；
According to the mapping relations between memory physical address and memory virtual address, obtains the target memory and manage first number
According to corresponding memory virtual address；
The corresponding memory virtual address of the target memory management metadata is accessed, to realize to the target memory management
The access of metadata.
A kind of processing unit of memory management metadata, described device include:
Call unit saves as in the memory management metadata for calling mmap storage allocation to manage metadata memory
Huge page big page memory；
Unit is established, for establishing physical address mapping table, the physical address mapping table saves each memory management member
The physics frame number of the corresponding memory management metadata memory of data；
Access unit, for passing through the physical address mapping table in response to access target memory management metadata request
The physics frame number of the corresponding memory management metadata memory of the target memory management metadata is searched, to realize to the mesh
The access of memory management metadata is marked, the target memory management metadata is any memory management metadata.
In one possible implementation, the call unit is specifically used for:
The process for starting User space calls mmap storage allocation to manage metadata memory.
In one possible implementation, described device further include:
Adding unit, for adding huge page memory mark for the memory management metadata memory.
In one possible implementation, the access target memory management metadata request is the touching when skipping leaf
Hair.
In one possible implementation, the access unit includes:
Subelement is searched, it is corresponding for searching the target memory management metadata by the physical address mapping table
The physics frame number of memory management metadata memory；
Subelement is determined, for determining the corresponding memory physical address of the physics frame number；
Subelement is obtained, for according to the mapping relations between memory physical address and memory virtual address, described in acquisition
Target memory manages the corresponding memory virtual address of metadata；
Subelement is accessed, for accessing the corresponding memory virtual address of the target memory management metadata, with realization pair
The access of the target memory management metadata.
It can be seen that the embodiment of the present application has the following beneficial effects:
In the embodiment of the present application, huge has been used for handling the memory management metadata memory of memory management metadata
Page memory, so that the efficiency of access memory management metadata is improved, meanwhile, it is distributed for the ease of kernel module using mmap
Memory management metadata memory, increase physical address mapping table, pass through physical address mapping table and search accessed target
The physics frame number of the corresponding memory management metadata memory of memory management metadata is realized to target memory management metadata
Quickly access.
Detailed description of the invention
Fig. 1 is the flow chart of the processing method of memory management metadata provided by the embodiments of the present application；
Fig. 2 is the flow chart of access target memory management metadata provided by the embodiments of the present application；
Fig. 3 is the schematic diagram of access target memory management metadata provided by the embodiments of the present application；
Fig. 4 is the schematic diagram of the processing unit of memory management metadata provided by the embodiments of the present application.
Specific embodiment
In order to make the above objects, features, and advantages of the present application more apparent, with reference to the accompanying drawing and it is specific real
Mode is applied to be described in further detail the embodiment of the present application.
It is needed in memory management process using to memory management metadata, and lacks effectively handle this in the prior art
The method of a little memory management metadata.For this purpose, the embodiment of the present application is proposed using huge page (big page) memory processing storage system
The method of memory management metadata in system further provides and utilizes memory management metadata memory (memory management member number
According to memory use huge page memory) access memory management metadata method.Wherein, the embodiment of the present application selects huge
Page, so that management virtual address number tails off, is accelerated to replace traditional 4kb memory pages by using big page memory
Mapping from virtual address to physical address and the swapping in and out by abandoning memory pages are to improve the globality of memory
Can, to improve the efficiency of access memory management metadata, improve the performance of entire storage system.
It is carried out below with reference to processing method and processing device of the attached drawing to memory management metadata provided by the embodiments of the present application
It is described in detail.
It is shown in Figure 1, show a kind of stream of the processing method of memory management metadata provided by the embodiments of the present application
Cheng Tu may comprise steps of:
Step 101: calling mmap storage allocation to manage metadata memory, save as huge page in memory management metadata
Memory.
In the embodiment of the present application, it is necessary first in memory management metadata of the distribution for handling memory management metadata
It deposits, so that the memory management metadata memory can be used in the application of the kernel module of storage system and User space.
In order to realize that memory management metadata memory can be used in the application of kernel module and User space, can call
Mmap carrys out storage allocation management metadata memory.Wherein, mmap is a kind of method of Memory Mapping File.In the concrete realization,
The process that can star User space calls mmap storage allocation management metadata memory.Pass through execution before kernel module load
The process of User space calls mmap storage allocation to manage metadata memory, before guaranteeing kernel module load, these memory pipes
Reason metadata memory distributed, and can by mono- filename of mmap come using.
During distribution and shared-memory management metadata memory, huge page memory is had in mmap when calling
Mark (such as VM_HUGETLB label), then represent distributed memory management metadata memory and need for huge page memory.
An available free area is found in virtual memory, distributes virtual memory space as memory management metadata memory, together
When can also add huge page memory mark for the memory management metadata memory that is distributed, to identify distributed memory
Huge page memory is saved as in management metadata.Memory management metadata memory is made of multiple huge page memories.
Step 102: establishing physical address mapping table, it is corresponding that physical address mapping table saves each memory management metadata
The physics frame number of memory management metadata memory.
In order to allow the memory that kernel module is easy to use User space to distribute by mmap in storage system, one is increased
A physical address mapping table preserves the corresponding memory management member of each memory management metadata table in the physical address mapping table
The physics frame number of datarams, and each physics frame number is corresponding with a memory physical address.In the concrete realization, physics
Address mapping table can pass through/proc/self/pagemap file acquisition.
For example, memory management metadata table can have anchor table, bus table, nar table, ref table, iob table etc., each
Memory management metadata table is corresponding with multiple huge page memories, then each memory management is preserved in physical address mapping table
The physics frame number of the corresponding each huge page memory of metadata table.
Step 103: in response to access target memory management metadata request, being searched in target by physical address mapping table
The physics frame number of the corresponding memory management metadata memory of management metadata is deposited, to realize to target memory management metadata
Access, it is that either memory manages metadata that target memory, which manages metadata,.
Access target memory management metadata request can be triggered when skipping leaf, target memory manages metadata can be with
It is any one of memory management metadata, such as access target memory management metadata request can be access iob table request.
In response to the access target memory management metadata request, target memory can be searched by physical address mapping table
The physics frame number for managing the corresponding memory management metadata memory of metadata, can obtain target memory by the physics frame number
The corresponding virtual memory address of metadata is managed, may be implemented to manage target memory first number by accessing the virtual memory address
According to access.It may refer to the detailed description of subsequent embodiment to the access process of target memory management metadata.
In this way, in the embodiment of the present application, the memory management metadata memory for managing internal memory management metadata uses
Huge page memory, so that the efficiency of access memory management metadata is improved, meanwhile, for the ease of kernel module use
The memory management metadata memory of mmap distribution, increases physical address mapping table, is visited by physical address mapping table lookup
The physics frame number for the corresponding memory management metadata memory of target memory management metadata asked, is realized to target memory management
The quick access of metadata.
It is shown in Figure 2, show a kind of access target memory management metadata process provided by the embodiments of the present application
It is corresponding to search target memory management metadata by physical address mapping table in some possible implementations for flow chart
The physics frame number of memory management metadata memory may include following to realize the access to target memory management metadata
Step:
Step 201: target memory being searched by physical address mapping table and manages the corresponding memory management metadata of metadata
The physics frame number of memory.
In the embodiment of the present application, the corresponding memory pipe of each memory management metadata is preserved in physical address mapping table
It is corresponding can then to search physical address mapping table acquisition target memory management metadata for the physics frame number for managing metadata memory
The physics frame number of a certain huge page memory.
Step 202: determining the corresponding memory physical address of physics frame number.
Each physics frame number is corresponding with fixed memory physical address, then can determine the object obtained in step 201
Manage the corresponding memory physical address of frame number.
Step 203: according to the mapping relations between memory physical address and memory virtual address, obtaining target memory management
The corresponding memory virtual address of metadata.
Meanwhile having preset mapping relations between memory physical address and memory virtual address, then it can determine step 202
The corresponding memory virtual address of the memory physical address of middle acquisition.The memory virtual address is to access target memory management member
Memory virtual address required for data.
Step 204: the corresponding memory virtual address of access target memory management metadata, to realize to target memory management
The access of metadata.
The corresponding memory virtual address of metadata is managed by accessing the target memory, then may be implemented to target memory pipe
Manage the access of metadata.In addition, in practical applications, access target memory management metadata can also establish virtual address to object
Manage the mapping process of address.
It is shown in Figure 3, show a kind of access target memory management metadata process provided by the embodiments of the present application
Schematic diagram.
In conjunction with practical application scene, by taking iob table is target memory management metadata as an example, to access target memory management member
Data procedures are illustrated.Iob table serial number is obtained first, which huge which can be calculated at according to the iob table serial number
To obtain place huge page memory number in page memory.Huge page memory number where having obtained, then can be in object
The physics frame number of the corresponding huge page memory of the iob table is searched in reason address mapping table, i.e., according to where the iob table
Huge page memory number can find corresponding physics frame number in physical address mapping table.The physics frame number pair
Ying Youyi memory physical address, while according to the mapping relations of memory physical address and memory virtual address, available correspondence
Memory virtual address.Then accessing the memory virtual address may be implemented to access the iob table.
In this way, the embodiment of the present application can be realized by the physical address mapping table of setting manages metadata to target memory
Quick access.
It is shown in Figure 4, show a kind of showing for the processing unit of memory management metadata provided by the embodiments of the present application
It is intended to, may include:
Call unit 401, for calling mmap storage allocation to manage metadata memory, the memory management metadata memory
For huge page big page memory；
Unit 402 is established, for establishing physical address mapping table, the physical address mapping table saves each memory management
The physics frame number of the corresponding memory management metadata memory of metadata；
Access unit 403, for passing through the physical address map in response to access target memory management metadata request
Table searches the physics frame number of the corresponding memory management metadata memory of the target memory management metadata, to realize to described
Target memory manages the access of metadata, and the target memory management metadata is any memory management metadata.
In one possible implementation, the call unit can be specifically used for:
The process for starting User space calls mmap storage allocation to manage metadata memory.
In one possible implementation, described device can also include:
Adding unit, for adding huge page memory mark for the memory management metadata memory.
In one possible implementation, the access target memory management metadata request is the touching when skipping leaf
Hair.
In one possible implementation, the access unit may include:
Subelement is searched, it is corresponding for searching the target memory management metadata by the physical address mapping table
The physics frame number of memory management metadata memory；
Subelement is determined, for determining the corresponding memory physical address of the physics frame number；
Subelement is obtained, for according to the mapping relations between memory physical address and memory virtual address, described in acquisition
Target memory manages the corresponding memory virtual address of metadata；
Subelement is accessed, for accessing the corresponding memory virtual address of the target memory management metadata, with realization pair
The access of the target memory management metadata.
In this way, in the embodiment of the present application, the memory management metadata memory for managing internal memory management metadata uses
Huge page memory, so that the efficiency of access memory management metadata is improved, meanwhile, for the ease of kernel module use
The memory management metadata memory of mmap distribution, increases physical address mapping table, is visited by physical address mapping table lookup
The physics frame number for the corresponding memory management metadata memory of target memory management metadata asked, is realized to target memory management
The quick access of metadata.
It should be noted that each embodiment in this specification is described in a progressive manner, each embodiment emphasis is said
Bright is the difference from other embodiments, and the same or similar parts in each embodiment may refer to each other.For reality
For applying system or device disclosed in example, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, phase
Place is closed referring to method part illustration.
It should be appreciated that in this application, " at least one (item) " refers to one or more, and " multiple " refer to two or two
More than a."and/or" indicates may exist three kinds of relationships, for example, " A and/or B " for describing the incidence relation of affiliated partner
It can indicate: only exist A, only exist B and exist simultaneously tri- kinds of situations of A and B, wherein A, B can be odd number or plural number.Word
Symbol "/" typicallys represent the relationship that forward-backward correlation object is a kind of "or"." at least one of following (a) " or its similar expression, refers to
Any combination in these, any combination including individual event (a) or complex item (a).At least one of for example, in a, b or c
(a) can indicate: a, b, c, " a and b ", " a and c ", " b and c ", or " a and b and c ", and wherein a, b, c can be individually, can also
To be multiple.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
The foregoing description of the disclosed embodiments makes professional and technical personnel in the field can be realized or use the application.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of processing method of memory management metadata, which is characterized in that the described method includes:
It calls mmap storage allocation to manage metadata memory, saves as huge page big page memory in the memory management metadata；
Physical address mapping table is established, the physical address mapping table saves the corresponding memory management of each memory management metadata
The physics frame number of metadata memory；
In response to access target memory management metadata request, the target memory pipe is searched by the physical address mapping table
The physics frame number of the corresponding memory management metadata memory of metadata is managed, to realize to target memory management metadata
Access, the target memory management metadata is any memory management metadata.
2. the method according to claim 1, wherein the calling mmap storage allocation manage metadata memory,
Include:
The process for starting User space calls mmap storage allocation to manage metadata memory.
3. method according to claim 1 or 2, which is characterized in that the method also includes:
Huge page memory mark is added for the memory management metadata memory.
4. the method according to claim 1, wherein the access target memory management metadata request is to send out
What life triggered when skipping leaf.
5. the method according to claim 1, wherein described search the mesh by the physical address mapping table
The physics frame number of the corresponding memory management metadata memory of memory management metadata is marked, to realize to the target memory management
The access of metadata, comprising:
The target memory, which is searched, by the physical address mapping table manages the corresponding memory management metadata memory of metadata
Physics frame number；
Determine the corresponding memory physical address of the physics frame number；
According to the mapping relations between memory physical address and memory virtual address, the target memory management metadata pair is obtained
The memory virtual address answered；
The corresponding memory virtual address of the target memory management metadata is accessed, first number is managed to the target memory to realize
According to access.
6. a kind of processing unit of memory management metadata, which is characterized in that described device includes:
Call unit saves as huge in the memory management metadata for calling mmap storage allocation to manage metadata memory
Page big page memory；
Unit is established, for establishing physical address mapping table, the physical address mapping table saves each memory management metadata
The physics frame number of corresponding memory management metadata memory；
Access unit, for being searched by the physical address mapping table in response to access target memory management metadata request
The target memory manages the physics frame number of the corresponding memory management metadata memory of metadata, to realize in the target
The access of management metadata is deposited, the target memory management metadata is any memory management metadata.
7. device according to claim 6, which is characterized in that the call unit is specifically used for:
The process for starting User space calls mmap storage allocation to manage metadata memory.
8. device according to claim 6 or 7, which is characterized in that described device further include:
Adding unit, for adding huge page memory mark for the memory management metadata memory.
9. device according to claim 6, which is characterized in that the access target memory management metadata request is to send out
What life triggered when skipping leaf.
10. device according to claim 6, which is characterized in that the access unit includes:
Subelement is searched, manages the corresponding memory of metadata for searching the target memory by the physical address mapping table
Manage the physics frame number of metadata memory；
Subelement is determined, for determining the corresponding memory physical address of the physics frame number；
Subelement is obtained, for obtaining the target according to the mapping relations between memory physical address and memory virtual address
The corresponding memory virtual address of memory management metadata；
Subelement is accessed, for accessing the corresponding memory virtual address of the target memory management metadata, to realize to described
The access of target memory management metadata.
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| Publication number | Publication date |
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| CN109508304B (en) | 2021-10-29 |
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