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What: /sys/bus/edac/devices/<dev-name>/scrubX
Date: March 2025
KernelVersion: 6.15
Contact: linux-edac@vger.kernel.org
Description:
The sysfs EDAC bus devices /<dev-name>/scrubX subdirectory
belongs to an instance of memory scrub control feature,
where <dev-name> directory corresponds to a device/memory
region registered with the EDAC device driver for the
scrub control feature.
The sysfs scrub attr nodes are only present if the parent
driver has implemented the corresponding attr callback
function and provided the necessary operations to the EDAC
device driver during registration.
What: /sys/bus/edac/devices/<dev-name>/scrubX/addr
Date: March 2025
KernelVersion: 6.15
Contact: linux-edac@vger.kernel.org
Description:
(RW) The base address of the memory region to be scrubbed
for on-demand scrubbing. Setting address starts scrubbing.
The size must be set before that.
The readback addr value is non-zero if the requested
on-demand scrubbing is in progress, zero otherwise.
What: /sys/bus/edac/devices/<dev-name>/scrubX/size
Date: March 2025
KernelVersion: 6.15
Contact: linux-edac@vger.kernel.org
Description:
(RW) The size of the memory region to be scrubbed
(on-demand scrubbing).
What: /sys/bus/edac/devices/<dev-name>/scrubX/enable_background
Date: March 2025
KernelVersion: 6.15
Contact: linux-edac@vger.kernel.org
Description:
(RW) Start/Stop background (patrol) scrubbing if supported.
What: /sys/bus/edac/devices/<dev-name>/scrubX/min_cycle_duration
Date: March 2025
KernelVersion: 6.15
Contact: linux-edac@vger.kernel.org
Description:
(RO) Supported minimum scrub cycle duration in seconds
by the memory scrubber.
Device-based scrub: returns the minimum scrub cycle
supported by the memory device.
Region-based scrub: returns the max of minimum scrub cycles
supported by individual memory devices that back the region.
What: /sys/bus/edac/devices/<dev-name>/scrubX/max_cycle_duration
Date: March 2025
KernelVersion: 6.15
Contact: linux-edac@vger.kernel.org
Description:
(RO) Supported maximum scrub cycle duration in seconds
by the memory scrubber.
Device-based scrub: returns the maximum scrub cycle supported
by the memory device.
Region-based scrub: returns the min of maximum scrub cycles
supported by individual memory devices that back the region.
If the memory device does not provide maximum scrub cycle
information, return the maximum supported value of the scrub
cycle field.
What: /sys/bus/edac/devices/<dev-name>/scrubX/current_cycle_duration
Date: March 2025
KernelVersion: 6.15
Contact: linux-edac@vger.kernel.org
Description:
(RW) The current scrub cycle duration in seconds and must be
within the supported range by the memory scrubber.
Scrub has an overhead when running and that may want to be
reduced by taking longer to do it.
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