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kswapd: replace try_to_freeze() with kthread_freezable_should_stop() 

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@gmail.com
Signed-off-by: Levi Yun <ppbuk5246@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Levi Yun 2024-01-26 15:25:54 +00:00 committed by Andrew Morton
parent 13ef742457
commit 96200c9150
1 changed files with 6 additions and 6 deletions
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12
mm/vmscan.c
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@ -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;
/*