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Code Issues Releases Wiki Activity

f2fs: Use wait_event_freezable_timeout() for freezable kthread 

A freezable kernel thread can enter frozen state during freezing by
either calling try_to_freeze() or using wait_event_freezable() and its
variants. So for the following snippet of code in a kernel thread loop:
  wait_event_interruptible_timeout();
  try_to_freeze();

We can change it to a simple wait_event_freezable_timeout() and then
eliminate the function calls to try_to_freeze() and freezing().

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Kevin Hao 2023-12-21 14:49:16 +08:00 committed by Jaegeuk Kim
parent 86d7d57a3f
commit 94e7eb4241
2 changed files with 5 additions and 8 deletions
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6
fs/f2fs/gc.c
View File

@ -46,8 +46,8 @@ static int gc_thread_func(void *data)
do {
bool sync_mode, foreground = false;
wait_event_interruptible_timeout(*wq,
kthread_should_stop() || freezing(current) ||
wait_event_freezable_timeout(*wq,
kthread_should_stop() ||
waitqueue_active(fggc_wq) ||
gc_th->gc_wake,
msecs_to_jiffies(wait_ms));
@ -59,7 +59,7 @@ static int gc_thread_func(void *data)
if (gc_th->gc_wake)
gc_th->gc_wake = false;
if (try_to_freeze() || f2fs_readonly(sbi->sb)) {
if (f2fs_readonly(sbi->sb)) {
stat_other_skip_bggc_count(sbi);
continue;
}

7
fs/f2fs/segment.c
View File

@ -1887,9 +1887,8 @@ static int issue_discard_thread(void *data)
set_freezable();
do {
wait_event_interruptible_timeout(*q,
kthread_should_stop() || freezing(current) ||
dcc->discard_wake,
wait_event_freezable_timeout(*q,
kthread_should_stop() || dcc->discard_wake,
msecs_to_jiffies(wait_ms));
if (sbi->gc_mode == GC_URGENT_HIGH ||
@ -1907,8 +1906,6 @@ static int issue_discard_thread(void *data)
if (atomic_read(&dcc->queued_discard))
__wait_all_discard_cmd(sbi, NULL);
if (try_to_freeze())
continue;
if (f2fs_readonly(sbi->sb))
continue;
if (kthread_should_stop())