From: SeongJae Park Date: Mon, 10 Feb 2025 18:27:34 +0000 (-0800) Subject: mm/damon/core: unset damos->walk_completed after confimed set X-Git-Tag: v6.15-rc1~81^2~359 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c32696ca5e8e9fff83c951f3aa45cac2e97b0667;p=thirdparty%2Flinux.git mm/damon/core: unset damos->walk_completed after confimed set Patch series "mm/damon/core: fix wrong and/or useless damos_walk() behaviors". damos_walk() can finish working earlier or later than expected, and start earlier than practical. First two behaviors are clearly wrong behavior (doesn't follow the documentation) and all three behaviors are only making the feature useless. Fix those. This patch (of 3): damos->walk_completed is only set, not unset. This can cause next damos_walk() finish earlier than expected. Unset it after all walk_completed is confirmed. Link: https://lkml.kernel.org/r/20250210182737.134994-1-sj@kernel.org Link: https://lkml.kernel.org/r/20250210182737.134994-2-sj@kernel.org Fixes: bf0eaba0ff9c ("mm/damon/core: implement damos_walk()") Signed-off-by: SeongJae Park Signed-off-by: Andrew Morton --- diff --git a/mm/damon/core.c b/mm/damon/core.c index dc8f94fe7c3bc..8e4ae9901b197 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -1494,6 +1494,9 @@ static void damos_walk_complete(struct damon_ctx *ctx, struct damos *s) if (!siter->walk_completed) return; } + damon_for_each_scheme(siter, ctx) + siter->walk_completed = false; + complete(&control->completion); mutex_lock(&ctx->walk_control_lock); ctx->walk_control = NULL;