CN111367697B - Error processing method and device - Google Patents
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- CN111367697B CN111367697B CN201811595605.4A CN201811595605A CN111367697B CN 111367697 B CN111367697 B CN 111367697B CN 201811595605 A CN201811595605 A CN 201811595605A CN 111367697 B CN111367697 B CN 111367697B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0706—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment
- G06F11/073—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment in a memory management context, e.g. virtual memory or cache management
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0793—Remedial or corrective actions
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Abstract
The embodiment of the invention provides an error processing method and device, wherein the method comprises the steps of receiving a garbage recycling instruction; responding to the garbage collection instruction, and carrying out data moving operation; wherein, the data moving operation is as follows: moving the effective data dispersed in the Block of the nonvolatile memory to a preset Block; if a Block middle Page data reading error occurs during the data moving operation, setting an error mark for the Page data with the error; and writing the Page data with the errors and the corresponding error marks into the new Page of the preset Block. According to the embodiment of the invention, when the data reading or other operations are required to be performed on the preset Block, the wrong Page data generated during garbage collection can be conveniently identified according to the error mark.
Description
Technical Field
The present invention relates to the field of memory processing technologies, and in particular, to a method and an apparatus for error processing.
Background
With the development of various electronic devices, embedded systems, and the like, nonvolatile memory devices are widely used in electronic products. Common non-volatile Memory such as NAND flash Memory (NAND FLASH Memory) and the like.
In the prior art, after garbage collection and other processes are performed on a nonvolatile memory, data errors often occur and cannot be identified.
Disclosure of Invention
In view of the above problems, an error processing method and apparatus according to an embodiment of the present invention are provided to solve the problem that a data error occurs in a nonvolatile memory and cannot be identified.
According to a first aspect of the present invention, there is provided an error handling method for use in a nonvolatile memory, the method comprising:
Receiving a garbage collection instruction;
responding to the garbage collection instruction, and carrying out data moving operation; wherein, the data moving operation is as follows: moving the effective data dispersed in the Block of the nonvolatile memory to a preset Block;
if a Block middle Page data reading error occurs during the data moving operation, setting an error mark for the Page data with the error;
and writing the Page data with the errors and the corresponding error marks into the new Page of the preset Block.
Preferably, the method further comprises:
And erasing invalid data in the Block of the nonvolatile memory.
Receiving a data reading instruction;
responding to the data reading instruction, and reading the data in the preset Block;
If the Page data with the error mark is detected in the reading process, the error mark is reported to a Host.
And under the condition that the invalidation instruction of the Host is received, the Page data with the error mark set is invalidated.
And under the condition that a valid instruction of the Host is received, processing the Page data with the error mark as valid data.
According to a second aspect of the present invention, there is provided an error handling apparatus for use in a nonvolatile memory, the apparatus comprising:
The garbage collection instruction receiving module is used for receiving the garbage collection instruction;
The data moving module is used for responding to the garbage collection instruction and carrying out data moving operation; wherein, the data moving operation is as follows: moving the effective data dispersed in the Block of the nonvolatile memory to a preset Block;
the marking module is used for setting an error mark for the Page data with errors if the Page data of the Block middle Page is read errors during the data moving operation;
And the writing module is used for writing the Page data with the errors and the corresponding error marks into the new Page of the preset Block.
Preferably, the method further comprises:
And the erasing module is used for erasing invalid data in the Block of the nonvolatile memory.
The data reading instruction receiving module is used for receiving a data reading instruction;
the reading module is used for responding to the data reading instruction and reading the data in the preset Block;
And the reporting module is used for reporting the error mark to the Host if the Page data with the error mark is detected in the reading process.
And the revocation module is used for revocation the Page data provided with the error mark under the condition of receiving the revocation instruction of the Host.
And the effective module is used for processing the Page data with the error mark as effective data under the condition that the effective instruction of the Host is received.
In the embodiment of the invention, when the data moving operation is performed in response to the garbage collection instruction, if the Page data in the Block is read in error, the error mark is set for the Page data with the error, and the Page data with the error and the corresponding error mark are written into the new Page of the preset Block, so that when the data reading or other operations are required to be performed in the preset Block, the Page data with the error during garbage collection can be conveniently identified according to the error mark.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a flow chart of an error handling method provided by an embodiment of the present invention;
FIG. 2 is a flowchart of an error handling method according to an embodiment of the present invention;
FIG. 3 is a block diagram of an error handling apparatus provided by an embodiment of the present invention;
fig. 4 is a specific block diagram of an error handling apparatus according to an embodiment of the present invention.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to FIG. 1, a flow chart of an error handling method is shown for application to a nonvolatile memory.
In the embodiment of the present invention, the inventors have found through a lot of researches that NANDFLASH READ Error may occur when FTL (flash translation layer ) performs internal data transfer operation, and NANDFLASH READ Error refers to an uncorrectable Error occurring when FTL reads NandFlash data. In general, when the FTL performs the internal data moving operation, it will not detect whether the read Page data is wrong, so that the read data with wrong reading is directly moved to a good Block, and no error record exists, so that the wrong data cannot be identified.
In view of the finding, in the embodiment of the present invention, when the data moving operation is performed in response to the garbage collection instruction, if a Page data reading error occurs in the Block middle Page, an error flag is set for the Page data with the error, and the Page data with the error and the corresponding error flag are written into a new Page of the preset Block, so that when the data reading or other operations need to be performed in the preset Block, the erroneous Page data during garbage collection can be conveniently identified according to the error flag.
The method specifically comprises the following steps:
step 101: and receiving a garbage collection instruction.
In the embodiment of the invention, the fact that the storage space of the nonvolatile memory cannot be well utilized due to the fact that the scattered storage and invalid data can fragment the storage space along with the use of the nonvolatile memory is considered, so that the storage space of the nonvolatile memory can be required to be tidied through garbage collection.
In a specific application, receiving the garbage collection instruction may indicate that garbage collection is needed, and when garbage collection is performed, invalid data in a Block of the nonvolatile memory may be erased, and scattered valid data may be moved to a preset Block, where the preset Block may be good blocks with continuous storage space.
Step 102: responding to the garbage collection instruction, and carrying out data moving operation; wherein, the data moving operation is as follows: and moving the effective data dispersed in the Block of the nonvolatile memory to a preset Block.
In the embodiment of the invention, as described above, in response to the garbage collection instruction, the FTL may perform a data moving operation to move the valid data dispersed in the Block of the nonvolatile memory to the preset Block.
Step 103: if a Block middle Page data reading error occurs during the data transfer operation, setting an error flag for the Page data with the error.
In the embodiment of the invention, if the Page data of the middle Page of the Block is read in error during the data moving operation, the error mark is set for the Page data with the error. For example, if the maximum number of bits that the FTL can read is 24 bits, and one Page data includes 25 bits, only 24 bits can be read during reading, and a reading error occurs, so that the Page data with the error can be set to an error flag. In a specific application, the mark can be stored in a metadata space for self management in a nonvolatile memory, so that excessive occupation of a storage space operable by a user is avoided.
Step 104: and writing the Page data with the errors and the corresponding error marks into the new Page of the preset Block.
In the embodiment of the invention, because the FTL is used for data transfer without the authority of discarding data and the like, even if errors occur during data reading, the Page data with errors and the corresponding error marks are also required to be written into a new Page of a preset Block, so that when other modules process the Page data, the error Page data can be identified.
As a preferred mode of the embodiment of the present invention, referring to fig. 2, the method further includes:
Step 105: a data read instruction is received.
Step 106: and responding to the data reading instruction, and reading the data in the preset Block.
Step 107: if the Page data with the error mark is detected in the reading process, the error mark is reported to a Host.
Step 108: and under the condition that the invalidation instruction of the Host is received, the Page data with the error mark set is invalidated.
Step 109: and under the condition that a valid instruction of the Host is received, processing the Page data with the error mark as valid data.
In the embodiment of the invention, after receiving the data reading instruction, the FTL can read Page data in the preset Block, and if Page data with an error mark is detected in the fetching process, the error mark is reported to the Host, and the Host is used for judging that the Page data corresponding to the error mark is invalidated or is treated as effective data according to actual application. In a practical application, it is assumed that Page data corresponding to an error flag is only a few data in a certain section of video data, and an effective instruction can be issued without affecting the video as effective data processing, and the Page data provided with the error flag is processed as effective data when receiving the effective instruction of the Host; in response, the Host may arbitrate that the Page data corresponding to the error flag is invalidated, and issue an invalidate instruction, and invalidate the Page data provided with the error flag when receiving the invalidate instruction of the Host.
In summary, in the embodiment of the present invention, when the data moving operation is performed in response to the garbage collection instruction, if a Page data reading error occurs in the Block middle Page, an error flag is set for the Page data with the error, and the Page data with the error and the corresponding error flag are written into the new Page of the preset Block, so that when the data reading or other operations need to be performed in the preset Block, the erroneous Page data during garbage collection can be conveniently identified according to the error flag.
It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present invention is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred embodiments, and that the acts are not necessarily required for the present invention.
Referring to fig. 3, there is shown a block diagram of an error handling apparatus for use with a nonvolatile memory, the apparatus comprising:
a garbage collection instruction receiving module 210, configured to receive a garbage collection instruction;
A data moving module 220, configured to respond to the garbage collection instruction, and perform a data moving operation; wherein, the data moving operation is as follows: moving the effective data dispersed in the Block of the nonvolatile memory to a preset Block;
A marking module 230, configured to set an error mark for the Page data with error if a Block middle Page data reading error occurs during the data moving operation;
The writing module 240 is configured to write the Page data with the error and the corresponding error flag into a new Page of the preset Block.
Preferably, referring to fig. 4, on the basis of fig. 3, the apparatus further comprises:
and an erasing module 250, configured to erase invalid data in the Block of the nonvolatile memory.
A data read instruction receiving module 260 for receiving a data read instruction;
A reading module 270, configured to read the data in the preset Block in response to the data reading instruction;
And the reporting module 280 is configured to report the error flag to the Host if Page data with the error flag set is detected during the reading process.
And the invalidation module 290 is configured to invalidate the Page data with the error flag set under the condition that the invalidation instruction of the Host is received.
And the validity module 300 is used for processing the Page data with the error mark as valid data under the condition that a valid instruction of the Host is received.
In summary, in the embodiment of the present invention, when the data moving operation is performed in response to the garbage collection instruction, if a Page data reading error occurs in the Block middle Page, an error flag is set for the Page data with the error, and the Page data with the error and the corresponding error flag are written into the new Page of the preset Block, so that when the data reading or other operations need to be performed in the preset Block, the erroneous Page data during garbage collection can be conveniently identified according to the error flag.
For the device embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference is made to the description of the method embodiments for relevant points.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
It will be apparent to those skilled in the art that embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the invention may take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
In a typical configuration, the computer device includes one or more processors (CPUs), an input/output interface, a network interface, and memory. The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media. Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include non-transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable error handling terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable error handling terminal device, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable error handling terminal apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable error processing terminal apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or terminal device that comprises the element.
The foregoing has outlined some of the more detailed description of the invention for a method and apparatus for error handling, wherein specific examples are provided herein to illustrate the principles and embodiments of the invention and to help understand the method and core concepts thereof; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (4)
1. An error handling method for use with a nonvolatile memory, the method comprising:
Receiving a garbage collection instruction;
Responding to the garbage collection instruction, and carrying out data moving operation; wherein, the data moving operation is as follows: moving the effective data dispersed in the Block of the nonvolatile memory to a preset Block; the preset Block is provided with a continuous storage space;
if a Block middle Page data reading error occurs during the data moving operation, setting an error mark for the Page data with the error;
Writing the Page data with the errors and the corresponding error marks into a new Page of the preset Block;
after writing the Page data with the error and the corresponding error mark into the new Page of the preset Block, the method further comprises:
receiving a data reading instruction;
responding to the data reading instruction, and reading the data in the preset Block;
If Page data with error marks is detected in the reading process, reporting the error marks to a Host; the Host is used for judging that Page data corresponding to the error mark is invalidated or used as effective data to be processed according to actual application;
The step of arbitrating that the Page data corresponding to the error mark is invalidated or treated as valid data according to the actual application comprises the following steps:
if the Page data corresponding to the error mark is part of the whole data and is used as the effective data to be processed without influencing the whole data, the Host sends out an effective instruction;
if the Page data corresponding to the error mark is used as the effective data to be processed, the whole data is affected, and the Host sends out a revocation instruction;
After the error flag is reported to the Host, the method further comprises:
under the condition that a revocation instruction of the Host is received, the Page data with the error mark is revoked;
And under the condition that a valid instruction of the Host is received, processing the Page data with the error mark as valid data.
2. The method as recited in claim 1, further comprising:
And erasing invalid data in the Block of the nonvolatile memory.
3. An error handling apparatus for use with a nonvolatile memory, the apparatus comprising:
The garbage collection instruction receiving module is used for receiving the garbage collection instruction;
The data moving module is used for responding to the garbage collection instruction and carrying out data moving operation; wherein, the data moving operation is as follows: moving the effective data dispersed in the Block of the nonvolatile memory to a preset Block; the preset Block is provided with a continuous storage space;
the marking module is used for setting an error mark for the Page data with errors if the Page data of the Block middle Page is read errors during the data moving operation;
The writing module is used for writing the Page data with the errors and the corresponding error marks into the new Page of the preset Block;
The apparatus further comprises:
the data reading instruction receiving module is used for receiving a data reading instruction;
the reading module is used for responding to the data reading instruction and reading the data in the preset Block;
The reporting module is used for reporting the error mark to a Host if the Page data provided with the error mark is detected in the reading process; the Host is used for judging that Page data corresponding to the error mark is invalidated or used as effective data to be processed according to actual application;
The step of arbitrating that the Page data corresponding to the error mark is invalidated or treated as valid data according to the actual application comprises the following steps:
if the Page data corresponding to the error mark is part of the whole data and is used as the effective data to be processed without influencing the whole data, the Host sends out an effective instruction;
if the Page data corresponding to the error mark is used as the effective data to be processed, the whole data is affected, and the Host sends out a revocation instruction;
The revocation module is used for revocation the Page data provided with the error mark under the condition that the revocation instruction of the Host is received;
and the effective module is used for processing the Page data with the error mark as effective data under the condition that the effective instruction of the Host is received.
4. A device according to claim 3, further comprising:
And the erasing module is used for erasing invalid data in the Block of the nonvolatile memory.
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| CN101458868A (en) * | 2008-12-23 | 2009-06-17 | 上海城市水资源开发利用国家工程中心有限公司 | Data collection method used for remote wireless meter reading system |
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| CN106681936A (en) * | 2016-12-29 | 2017-05-17 | 记忆科技(深圳)有限公司 | Bad block management method for NANDFLASH |
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| US10096370B1 (en) * | 2017-08-31 | 2018-10-09 | Micron Technology, Inc. | Voltage degradation aware NAND array management |
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