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mm/vmscan: fix comment for current_may_throttle

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Since commit 6d6435811c19 ("remove bdi_congested() and wb_congested() and
related functions"), there is no congested backing device check anymore. 
Correct the comment accordingly.

[akpm@linux-foundation.org: tweak grammar]
Link: https://lkml.kernel.org/r/20220414120202.30082-1-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2022-04-28 23:16:04 -07:00 committed by akpm
parent 02e458d8d0
commit 5829f7dbae
1 changed files with 3 additions and 4 deletions
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7
mm/vmscan.c
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@ -2297,10 +2297,9 @@ static unsigned int move_pages_to_lru(struct lruvec *lruvec,
}
/*
* If a kernel thread (such as nfsd for loop-back mounts) services
* a backing device by writing to the page cache it sets PF_LOCAL_THROTTLE.
* In that case we should only throttle if the backing device it is
* writing to is congested. In other cases it is safe to throttle.
* If a kernel thread (such as nfsd for loop-back mounts) services a backing
* device by writing to the page cache it sets PF_LOCAL_THROTTLE. In this case
* we should not throttle. Otherwise it is safe to do so.
*/
static int current_may_throttle(void)
{