Commit 5829f7db authored by Miaohe Lin's avatar Miaohe Lin Committed by Andrew Morton
Browse files

mm/vmscan: fix comment for current_may_throttle 

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: default avatarMiaohe Lin <linmiaohe@huawei.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 02e458d8

mm/vmscan.c

+3 −4
Original line number Diff line number Diff line
@@ -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)

{