公开(公告)号：US10452562B2

公开(公告)日：2019-10-22

申请号：US15257928

申请日：2016-09-07

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Hsing Mean Sha ,  Qingfeng Zhuge ,  Guanyu Zhu

IPC: G06F12/00 ,  G06F12/109 ,  G06F16/11 ,  G06F16/17 ,  G06F12/1009 ,  G06F3/06

Abstract: Embodiments of the application provide a file access method. A computing node receives a file open request that carries a file identifier. The computing node obtains an index node of a file that is identified by the file identifier. The computing node further obtains, based on the index node, a physical address space of a memory area in a file storage area, in which the file is stored. The computing node allocates a virtual address space to the file, and recodes a virtual-physical address mapping relationship by using a memory page table. The virtual-physical address mapping relationship includes a mapping relationship between the virtual address space and the physical address space.

公开(公告)号：US10796774B2

公开(公告)日：2020-10-06

申请号：US16120780

申请日：2018-09-04

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Liang Shi ,  Yejia Di ,  Hsing Mean Sha ,  Yuangang Wang ,  Dongfang Shan

IPC: G11C16/34 ,  G06F11/10 ,  G11C16/04 ,  G11C16/10 ,  G11C16/14 ,  G11C16/26 ,  G11C29/52 ,  G11C11/56 ,  H01L29/788

Abstract: A flash memory controller refreshes memory blocks in a flash memory device by setting different refresh cycles for individual memory blocks in the flash memory device. The flash memory controller records a number of erase operations performed on each memory block of the flash memory device. Upon detecting that a bit error rate of a memory block is greater than a preset threshold, the flash memory controller determines a refresh cycle for the memory block based on recorded number of erase operations performed on the memory block, and then refreshes the memory block according to the refresh cycle.