25 строки
1.0 KiB
Plaintext
25 строки
1.0 KiB
Plaintext
What: /sys/kernel/mm/numa/
|
|
Date: June 2021
|
|
Contact: Linux memory management mailing list <linux-mm@kvack.org>
|
|
Description: Interface for NUMA
|
|
|
|
What: /sys/kernel/mm/numa/demotion_enabled
|
|
Date: June 2021
|
|
Contact: Linux memory management mailing list <linux-mm@kvack.org>
|
|
Description: Enable/disable demoting pages during reclaim
|
|
|
|
Page migration during reclaim is intended for systems
|
|
with tiered memory configurations. These systems have
|
|
multiple types of memory with varied performance
|
|
characteristics instead of plain NUMA systems where
|
|
the same kind of memory is found at varied distances.
|
|
Allowing page migration during reclaim enables these
|
|
systems to migrate pages from fast tiers to slow tiers
|
|
when the fast tier is under pressure. This migration
|
|
is performed before swap. It may move data to a NUMA
|
|
node that does not fall into the cpuset of the
|
|
allocating process which might be construed to violate
|
|
the guarantees of cpusets. This should not be enabled
|
|
on systems which need strict cpuset location
|
|
guarantees.
|