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No-lose method of restart data and reserved memory management module

A technology for retaining memory and managing modules, applied in memory address/allocation/relocation, redundancy in operations, data error detection, response error generation, etc. Small changes and the effect of improving memory utilization

Active Publication Date: 2013-04-10
NEW H3C TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, once fast recovery is to be supported, the specifications of the system must be greatly reduced, or additional memory must be added

Method used

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  • No-lose method of restart data and reserved memory management module
  • No-lose method of restart data and reserved memory management module

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] For the convenience of description, the data to be written into the reserved memory by the application module is called reserved data.

[0030] figure 1 The flow chart of the method for restarting data without loss provided by the embodiment of the present invention, such as figure 1 As shown, the specific steps are as follows:

[0031] Step 101: Any application module finds that the system is about to restart, saves the reserved data of this module to the ordinary memory, records the address of the ordinary memory where the reserved data of the module is stored, and notifies the reserved memory management module of the ordinary memory address; The memory management module records the common memory addresses where the reserved data of all application modules are stored.

[0032] Reserved data may be stored in contiguous memo...

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Abstract

The invention discloses a no-lose method of restart data and a reserved memory management module. The no-lose method of restart data and the reserved memory management module are applied to a computer system. The method comprises the following steps of: before system restart, writing reserved data from an application module into an ordinary memory, and according to the total length of the reserved data, applying for a high memory for storing the reserved data; removing the reserved data in the ordinary memory to the high memory, wherein the high memory becomes a reserved memory, a reserved page table is maintained in the reserved memory, and the reserved page table is used for recording the address of the reserved data in the original ordinary memory and the address in the reserved memory, and recording an initial physical address and the total length of the reserved memory on a nonvolatile device; in the process of system restart, reading the initial physical address and the total length of the reserved memory from the nonvolatile device; and according to the reserved page table, removing the reserved data in the reserved memory to the ordinary memory to ensure that each application module reads the reserved data from the ordinary memory. The no-lose method of the restart data and the reserved memory management module improve the memory utilization ratio.

Description

technical field [0001] The invention relates to the technical field of data storage, in particular to a method for restarting data without losing data and a reserved memory management module. Background technique [0002] With the improvement of high reliability requirements, the upper layer software will require the system to store some data before restarting, and the data can be read out after restarting, so as to realize the rapid recovery of operating data, thereby reducing the downtime of the system. [0003] In common computer systems, non-volatile storage devices such as disks and data cards are used to complete the above functions. However, in an embedded system, devices such as disks and data cards do not necessarily exist. Moreover, the access rate of disks and data cards is low. For some scenarios that require high reliability and a large amount of data, if disks and data cards are used to complete the above functions, the system downtime will be greatly prolonge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/14G06F12/02
Inventor 胡小龙
Owner NEW H3C TECH CO LTD
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