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Docs/admin-guide/mm/damon/reclaim: document auto-tuning parameters

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Update DAMON_RECLAIM usage document for the user/self feedback based
auto-tuning of the quota.

Link: https://lkml.kernel.org/r/20240219194431.159606-21-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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SeongJae Park 2024-02-19 11:44:31 -08:00 committed by Andrew Morton
parent 7ce55f8ffd
commit 75c40c2509
1 changed files with 27 additions and 0 deletions
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Documentation/admin-guide/mm/damon/reclaim.rst
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@ -117,6 +117,33 @@ milliseconds.
1 second by default.
quota_mem_pressure_us
---------------------
Desired level of memory pressure-stall time in microseconds.
While keeping the caps that set by other quotas, DAMON_RECLAIM automatically
increases and decreases the effective level of the quota aiming this level of
memory pressure is incurred. System-wide ``some`` memory PSI in microseconds
per quota reset interval (``quota_reset_interval_ms``) is collected and
compared to this value to see if the aim is satisfied. Value zero means
disabling this auto-tuning feature.
Disabled by default.
quota_autotune_feedback
-----------------------
User-specifiable feedback for auto-tuning of the effective quota.
While keeping the caps that set by other quotas, DAMON_RECLAIM automatically
increases and decreases the effective level of the quota aiming receiving this
feedback of value ``10,000`` from the user. DAMON_RECLAIM assumes the feedback
value and the quota are positively proportional. Value zero means disabling
this auto-tuning feature.
Disabled by default.
wmarks_interval
---------------