The quilt patch titled
Subject: kswapd: replace try_to_freeze() with kthread_freezable_should_stop()
has been removed from the -mm tree. Its filename was
kswapd-replace-try_to_freeze-to-kthread_freezable_should_stop.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: Levi Yun <ppbuk5246@xxxxxxxxx>
Subject: kswapd: replace try_to_freeze() with kthread_freezable_should_stop()
Date: Fri, 26 Jan 2024 15:25:54 +0000
Instead of using try_to_freeze, use kthread_freezable_should_stop in
kswapd. By this, we can avoid unnecessary freezing when kswapd should
stop.
Link: https://lkml.kernel.org/r/20240126152556.58791-1-ppbuk5246@xxxxxxxxx
Signed-off-by: Levi Yun <ppbuk5246@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
--- a/mm/vmscan.c~kswapd-replace-try_to_freeze-to-kthread_freezable_should_stop
+++ a/mm/vmscan.c
@@ -6796,6 +6796,7 @@ restart:
bool raise_priority = true;
bool balanced;
bool ret;
+ bool was_frozen;
sc.reclaim_idx = highest_zoneidx;
@@ -6894,9 +6895,9 @@ restart:
/* Check if kswapd should be suspending */
__fs_reclaim_release(_THIS_IP_);
- ret = try_to_freeze();
+ ret = kthread_freezable_should_stop(&was_frozen);
__fs_reclaim_acquire(_THIS_IP_);
- if (ret || kthread_should_stop())
+ if (was_frozen || ret)
break;
/*
@@ -7102,7 +7103,7 @@ static int kswapd(void *p)
WRITE_ONCE(pgdat->kswapd_highest_zoneidx, MAX_NR_ZONES);
atomic_set(&pgdat->nr_writeback_throttled, 0);
for ( ; ; ) {
- bool ret;
+ bool was_frozen;
alloc_order = reclaim_order = READ_ONCE(pgdat->kswapd_order);
highest_zoneidx = kswapd_highest_zoneidx(pgdat,
@@ -7119,15 +7120,14 @@ kswapd_try_sleep:
WRITE_ONCE(pgdat->kswapd_order, 0);
WRITE_ONCE(pgdat->kswapd_highest_zoneidx, MAX_NR_ZONES);
- ret = try_to_freeze();
- if (kthread_should_stop())
+ if (kthread_freezable_should_stop(&was_frozen))
break;
/*
* We can speed up thawing tasks if we don't call balance_pgdat
* after returning from the refrigerator
*/
- if (ret)
+ if (was_frozen)
continue;
/*
_
Patches currently in -mm which might be from ppbuk5246@xxxxxxxxx are
