a15797f4bef201544263ef5c264c3f48d78cc5d4 libnvdimm, nfit: export an
'ecc_unit_size' sysfs attribute
v4.14-rc1~61^2~14
** Tags added: kernel
** Information type changed from Proprietary to Public
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1730805
Title:
[Feature][Crystal Ridge] Export the read-modify-write boundary in
sysfs
Status in intel:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Bionic:
Fix Released
Bug description:
Description:
When the nfit driver initializes it runs an ARS (Address Range Scrub)
operation across every pmem range. Part of that process involves
determining the ARS capabilities of a given address range. One of the
capabilities that is reported is the 'Clear Uncorrectable Error Range
Length Unit Size' (see: ACPI 6.2 section 9.20.7.4 Function Index 1 -
Query ARS Capabilities). This property is of interest to userspace
software as it indicates the boundary at which the NVDIMM may ned to
perform read-modify-write cycles to maintain ECC blocks.
Commit Ids:
a15797f4bef2
Target Kernel: 4.14
Target Release: 18.04
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