The patch titled
Subject: fs/fat/fatent.c: add cond_resched() to fat_count_free_clusters()
has been added to the -mm tree. Its filename is
fs-fat-add-cond_resched-to-fat_count_free_clusters.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/fs-fat-add-cond_resched-to-fat_count_free_clusters.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/fs-fat-add-cond_resched-to-fat_count_free_clusters.patch
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------------------------------------------------------
From: Khazhismel Kumykov <khazhy@xxxxxxxxxx>
Subject: fs/fat/fatent.c: add cond_resched() to fat_count_free_clusters()
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@xxxxxxxxxx
Signed-off-by: Khazhismel Kumykov <khazhy@xxxxxxxxxx>
Acked-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/fs/fat/fatent.c~fs-fat-add-cond_resched-to-fat_count_free_clusters
+++ a/fs/fat/fatent.c
@@ -682,6 +682,7 @@ int fat_count_free_clusters(struct super
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;
_
Patches currently in -mm which might be from khazhy@xxxxxxxxxx are
fs-fat-add-cond_resched-to-fat_count_free_clusters.patch
