The quilt patch titled
Subject: mm/damon/sysfs: avoid call damon_target_has_pid() repeatedly
has been removed from the -mm tree. Its filename was
mm-damon-sysfs-avoid-call-damon_target_has_pid-repeatedly.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: Xin Hao <xhao@xxxxxxxxxxxxxxxxx>
Subject: mm/damon/sysfs: avoid call damon_target_has_pid() repeatedly
Date: Thu, 15 Sep 2022 22:22:36 +0800
In damon_sysfs_destroy_targets(), we call damon_target_has_pid() to check
whether the 'ctx' include a valid pid, but there no need to call
damon_target_has_pid() to check repeatedly, just need call it once.
[xhao@xxxxxxxxxxxxxxxxx: more simplified code calls damon_target_has_pid()]
Link: https://lkml.kernel.org/r/20220916133535.7428-1-xhao@xxxxxxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/20220915142237.92529-1-xhao@xxxxxxxxxxxxxxxxx
Signed-off-by: Xin Hao <xhao@xxxxxxxxxxxxxxxxx>
Reviewed-by: SeongJae Park <sj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/sysfs.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/mm/damon/sysfs.c~mm-damon-sysfs-avoid-call-damon_target_has_pid-repeatedly
+++ a/mm/damon/sysfs.c
@@ -2143,9 +2143,10 @@ static int damon_sysfs_set_attrs(struct
static void damon_sysfs_destroy_targets(struct damon_ctx *ctx)
{
struct damon_target *t, *next;
+ bool has_pid = damon_target_has_pid(ctx);
damon_for_each_target_safe(t, next, ctx) {
- if (damon_target_has_pid(ctx))
+ if (has_pid)
put_pid(t->pid);
damon_destroy_target(t);
}
_
Patches currently in -mm which might be from xhao@xxxxxxxxxxxxxxxxx are
mm-damon-move-sz_damon_region-to-damon_sz_region.patch
mm-damon-use-damon_sz_region-in-appropriate-place.patch
