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mm/damon/core: finish kdamond as soon as any callback returns an error

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When 'after_sampling()' or 'after_aggregation()' DAMON callbacks return an
error, kdamond continues the remaining loop once.  It makes no much sense
to run the remaining part while something wrong already happened.  The
context might be corrupted or having invalid data.  This commit therefore
makes kdamond skips the remaining works and immediately finish in the
cases.

Link: https://lkml.kernel.org/r/20220429160606.127307-3-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2022-05-09 18:20:54 -07:00 committed by Andrew Morton
parent 6e74d2bf5a
commit abacd635fa
1 changed files with 6 additions and 2 deletions
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8
mm/damon/core.c
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@ -1089,8 +1089,10 @@ static int kdamond_fn(void *data)
if (ctx->ops.prepare_access_checks)
ctx->ops.prepare_access_checks(ctx);
if (ctx->callback.after_sampling &&
ctx->callback.after_sampling(ctx))
ctx->callback.after_sampling(ctx)) {
done = true;
continue;
}
kdamond_usleep(ctx->sample_interval);
@ -1102,8 +1104,10 @@ static int kdamond_fn(void *data)
max_nr_accesses / 10,
sz_limit);
if (ctx->callback.after_aggregation &&
ctx->callback.after_aggregation(ctx))
ctx->callback.after_aggregation(ctx)) {
done = true;
continue;
}
kdamond_apply_schemes(ctx);
kdamond_reset_aggregated(ctx);
kdamond_split_regions(ctx);