[merged mm-stable] mm-damon-core-skip-apply-schemes-if-empty.patch removed from -mm tree

[merged mm-stable] mm-damon-core-skip-apply-schemes-if-empty.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/damon/core: skip apply schemes if empty
has been removed from the -mm tree.  Its filename was
     mm-damon-core-skip-apply-schemes-if-empty.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Huaisheng Ye <huaisheng.ye@intel.com>
Subject: mm/damon/core: skip apply schemes if empty
Date: Mon, 16 Jan 2023 14:23:47 +0800

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>
---


--- a/mm/damon/core.c~mm-damon-core-skip-apply-schemes-if-empty
+++ a/mm/damon/core.c
@@ -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)
_

Patches currently in -mm which might be from huaisheng.ye@intel.com are