From: Sasha Levin <sashal@kernel.org>
To: stable@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Khazhismel Kumykov <khazhy@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 3.18 4/4] fs/fat/fatent.c: add cond_resched() to fat_count_free_clusters()
Date: Mon, 22 Oct 2018 06:22:55 -0400 [thread overview]
Message-ID: <20181022102255.41695-4-sashal@kernel.org> (raw)
In-Reply-To: <20181022102255.41695-1-sashal@kernel.org>
From: Khazhismel Kumykov <khazhy@google.com>
[ Upstream commit ac081c3be3fae6d0cc3e1862507fca3862d30b67 ]
On non-preempt kernels this loop can take a long time (more than 50 ticks)
processing through entries.
Link: http://lkml.kernel.org/r/20181010172623.57033-1-khazhy@google.com
Signed-off-by: Khazhismel Kumykov <khazhy@google.com>
Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/fat/fatent.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c
index 08b3db146888..83550ac31f49 100644
--- a/fs/fat/fatent.c
+++ b/fs/fat/fatent.c
@@ -684,6 +684,7 @@ int fat_count_free_clusters(struct super_block *sb)
if (ops->ent_get(&fatent) == FAT_ENT_FREE)
free++;
} while (fat_ent_next(sbi, &fatent));
+ cond_resched();
}
sbi->free_clusters = free;
sbi->free_clus_valid = 1;
--
2.17.1
prev parent reply other threads:[~2018-10-22 10:23 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-22 10:22 [PATCH AUTOSEL 3.18 1/4] Input: mousedev - add a schedule point in mousedev_write() Sasha Levin
2018-10-22 10:22 ` [PATCH AUTOSEL 3.18 2/4] Input: evdev - add a schedule point in evdev_write() Sasha Levin
2018-10-22 10:22 ` [PATCH AUTOSEL 3.18 3/4] Input: uinput - add a schedule point in uinput_inject_events() Sasha Levin
2018-10-22 10:22 ` Sasha Levin [this message]
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