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mm/damon/core: skip apply schemes if empty

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Sometimes there is no scheme in damon's context, for example just use damo
record to monitor workload's data access pattern.

If current damon context doesn't have any scheme in the list, kdamond has
no need to iterate over list of all targets and regions but do nothing.

So, skip apply schemes when ctx->schemes is empty.

Link: https://lkml.kernel.org/r/20230116062347.1148553-1-huaisheng.ye@intel.com
Signed-off-by: Huaisheng Ye <huaisheng.ye@intel.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Huaisheng Ye 2023-01-16 14:23:47 +08:00 committed by Andrew Morton
parent 98001fd63d
commit 64517d6e12
1 changed files with 2 additions and 1 deletions
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3
mm/damon/core.c
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@ -1269,7 +1269,8 @@ static int kdamond_fn(void *data)
if (ctx->callback.after_aggregation &&
ctx->callback.after_aggregation(ctx))
break;
kdamond_apply_schemes(ctx);
if (!list_empty(&ctx->schemes))
kdamond_apply_schemes(ctx);
kdamond_reset_aggregated(ctx);
kdamond_split_regions(ctx);
if (ctx->ops.reset_aggregated)