mm/damon/core: add damon_merge_regions_of() debug_sanity check

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damon_merge_regions_of() should be called only after aggregation is
finished and therefore each region's nr_accesses and nr_accesses_bp match.
There were bugs that broke the assumption, during development of online
DAMON parameter updates and monitoring results handling changes.  Add a
sanity check for that under CONFIG_DAMON_DEBUG_SANITY.

Link: https://lkml.kernel.org/r/20260306152914.86303-7-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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SeongJae Park 2026-03-06 07:29:09 -08:00 • committed by Andrew Morton

parent 0bb7682fdb

commit c070da2391

1 changed files with 15 additions and 0 deletions

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mm/damon/core.c

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