Messages in this thread Patch in this message | | | From | Sasha Levin <> | 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 |
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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
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