diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2024-03-20 20:43:11 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-03 16:19:39 +0300 |
| commit | 3d47eb405781cc5127deca9a14e24b27696087a1 (patch) | |
| tree | 1b4b879c420b26fd7e76c52be8d0441794ecb399 /drivers/md | |
| parent | 3070c70a3e46165e4828d519944694694d76a963 (diff) | |
| download | linux-3d47eb405781cc5127deca9a14e24b27696087a1.tar.xz | |
dm snapshot: fix lockup in dm_exception_table_exit
[ Upstream commit 6e7132ed3c07bd8a6ce3db4bb307ef2852b322dc ]
There was reported lockup when we exit a snapshot with many exceptions.
Fix this by adding "cond_resched" to the loop that frees the exceptions.
Reported-by: John Pittman <jpittman@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-snap.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index b748901a4fb5..1c601508ce0b 100644 --- a/drivers/md/dm-snap.c +++ b/drivers/md/dm-snap.c @@ -679,8 +679,10 @@ static void dm_exception_table_exit(struct dm_exception_table *et, for (i = 0; i < size; i++) { slot = et->table + i; - hlist_bl_for_each_entry_safe(ex, pos, n, slot, hash_list) + hlist_bl_for_each_entry_safe(ex, pos, n, slot, hash_list) { kmem_cache_free(mem, ex); + cond_resched(); + } } kvfree(et->table); |