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mm: ksm: remove unnecessary try_to_freeze()

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A freezable kernel thread can enter frozen state during freezing by
either calling try_to_freeze() or using wait_event_freezable() and its
variants. However, there is no need to use both methods simultaneously.

Link: https://lkml.kernel.org/r/20231213090906.1070985-1-haokexin@gmail.com
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kevin Hao 2023-12-13 17:09:06 +08:00 committed by Andrew Morton
parent e3898efaff
commit f55afd954c
1 changed files with 1 additions and 3 deletions
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4
mm/ksm.c
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@ -2604,11 +2604,9 @@ static int ksm_scan_thread(void *nothing)
ksm_do_scan(ksm_thread_pages_to_scan);
mutex_unlock(&ksm_thread_mutex);
try_to_freeze();
if (ksmd_should_run()) {
sleep_ms = READ_ONCE(ksm_thread_sleep_millisecs);
wait_event_interruptible_timeout(ksm_iter_wait,
wait_event_freezable_timeout(ksm_iter_wait,
sleep_ms != READ_ONCE(ksm_thread_sleep_millisecs),
msecs_to_jiffies(sleep_ms));
} else {