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85cc50bfcb
user can configurare scrub cycle for a region or a memory device via sysfs interface. Currently, these interfaces have not enough description for the return value. So adding return value description to these interfaces. Suggested-by: Alison Schofield <alison.schofield@intel.com> Signed-off-by: Shiju Jose <shiju.jose@huawei.com> Signed-off-by: Li Ming <ming.li@zohomail.com> Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Davidlohr Bueso <dave@stgolabs.net> Link: https://patch.msgid.link/20250603104314.25569-2-ming.li@zohomail.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
85 lines
2.8 KiB
Text
85 lines
2.8 KiB
Text
What: /sys/bus/edac/devices/<dev-name>/scrubX
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Date: March 2025
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KernelVersion: 6.15
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Contact: linux-edac@vger.kernel.org
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Description:
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The sysfs EDAC bus devices /<dev-name>/scrubX subdirectory
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belongs to an instance of memory scrub control feature,
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where <dev-name> directory corresponds to a device/memory
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region registered with the EDAC device driver for the
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scrub control feature.
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The sysfs scrub attr nodes are only present if the parent
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driver has implemented the corresponding attr callback
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function and provided the necessary operations to the EDAC
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device driver during registration.
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What: /sys/bus/edac/devices/<dev-name>/scrubX/addr
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Date: March 2025
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KernelVersion: 6.15
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Contact: linux-edac@vger.kernel.org
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Description:
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(RW) The base address of the memory region to be scrubbed
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for on-demand scrubbing. Setting address starts scrubbing.
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The size must be set before that.
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The readback addr value is non-zero if the requested
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on-demand scrubbing is in progress, zero otherwise.
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What: /sys/bus/edac/devices/<dev-name>/scrubX/size
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Date: March 2025
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KernelVersion: 6.15
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Contact: linux-edac@vger.kernel.org
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Description:
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(RW) The size of the memory region to be scrubbed
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(on-demand scrubbing).
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What: /sys/bus/edac/devices/<dev-name>/scrubX/enable_background
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Date: March 2025
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KernelVersion: 6.15
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Contact: linux-edac@vger.kernel.org
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Description:
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(RW) Start/Stop background (patrol) scrubbing if supported.
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What: /sys/bus/edac/devices/<dev-name>/scrubX/min_cycle_duration
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Date: March 2025
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KernelVersion: 6.15
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Contact: linux-edac@vger.kernel.org
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Description:
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(RO) Supported minimum scrub cycle duration in seconds
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by the memory scrubber.
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Device-based scrub: returns the minimum scrub cycle
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supported by the memory device.
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Region-based scrub: returns the max of minimum scrub cycles
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supported by individual memory devices that back the region.
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What: /sys/bus/edac/devices/<dev-name>/scrubX/max_cycle_duration
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Date: March 2025
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KernelVersion: 6.15
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Contact: linux-edac@vger.kernel.org
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Description:
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(RO) Supported maximum scrub cycle duration in seconds
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by the memory scrubber.
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Device-based scrub: returns the maximum scrub cycle supported
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by the memory device.
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Region-based scrub: returns the min of maximum scrub cycles
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supported by individual memory devices that back the region.
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If the memory device does not provide maximum scrub cycle
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information, return the maximum supported value of the scrub
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cycle field.
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What: /sys/bus/edac/devices/<dev-name>/scrubX/current_cycle_duration
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Date: March 2025
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KernelVersion: 6.15
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Contact: linux-edac@vger.kernel.org
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Description:
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(RW) The current scrub cycle duration in seconds and must be
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within the supported range by the memory scrubber.
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Scrub has an overhead when running and that may want to be
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reduced by taking longer to do it.
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