mm/damon/core: implement PSI metric DAMOS quota goal

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Extend DAMOS quota goal metric with system wide memory pressure stall
time.  Specifically, the system level 'some' PSI for memory is used.  The
target value can be set in microseconds.  DAMOS measures the increased
amount of the PSI metric in last quota_reset_interval and use the ratio of
it versus the user-specified target PSI value as the score for the
auto-tuning feedback loop.

Link: https://lkml.kernel.org/r/20240219194431.159606-14-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 11:44:24 -08:00 • committed by Andrew Morton

parent bcce9bc16f

commit 2dbb60f789

2 changed files with 32 additions and 0 deletions

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7

include/linux/damon.h

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25

mm/damon/core.c

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