linux

iv/linux

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SeongJae Park 95bc35f9be mm/damon/sysfs: fix wrong empty schemes assumption under online tuning in damon_sysfs_set_schemes()

Commit da87878010e5 ("mm/damon/sysfs: support online inputs update") made
'damon_sysfs_set_schemes()' to be called for running DAMON context, which
could have schemes.  In the case, DAMON sysfs interface is supposed to
update, remove, or add schemes to reflect the sysfs files.  However, the
code is assuming the DAMON context wouldn't have schemes at all, and
therefore creates and adds new schemes.  As a result, the code doesn't
work as intended for online schemes tuning and could have more than
expected memory footprint.  The schemes are all in the DAMON context, so
it doesn't leak the memory, though.

Remove the wrong asssumption (the DAMON context wouldn't have schemes) in
'damon_sysfs_set_schemes()' to fix the bug.

Link: https://lkml.kernel.org/r/20221122194831.3472-1-sj@kernel.org
Fixes: da87878010e5 ("mm/damon/sysfs: support online inputs update")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org>	[5.19+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

2022-11-30 14:49:41 -08:00

core-test.h

mm/damon/core-test: test damon_set_regions

2022-10-03 14:03:06 -07:00

core.c

- Alistair Popple has a series which addresses a race which causes page

2022-10-14 12:28:43 -07:00

dbgfs-test.h

mm/damon/dbgfs-test: fix is_target_id() change

2022-03-22 15:57:12 -07:00

dbgfs.c

mm/damon/dbgfs: check if rm_contexts input is for a real context