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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2009-01-05 21:34:30 -0500
committerTheodore Ts'o <tytso@mit.edu>2009-01-05 21:34:30 -0500
commit032115fcef837a00336ddf7bda584e89789ea498 (patch)
tree3c36bca32a6590e675146638992ef988a0fbb430
parentfde4d95ad8711c84a36735a17136c45b19746af9 (diff)
ext4: Don't overwrite allocation_context ac_status
We can call ext4_mb_check_limits even after successfully allocating the requested blocks. In that case, make sure we don't overwrite ac_status if it already has the status AC_STATUS_FOUND. This fixes the lockdep warning: ============================================= [ INFO: possible recursive locking detected ] 2.6.28-rc6-autokern1 #1 --------------------------------------------- fsstress/11948 is trying to acquire lock: (&meta_group_info[i]->alloc_sem){----}, at: [<c04d9a49>] ext4_mb_load_buddy+0x9f/0x278 ..... stack backtrace: ..... [<c04db974>] ext4_mb_regular_allocator+0xbb5/0xd44 ..... but task is already holding lock: (&meta_group_info[i]->alloc_sem){----}, at: [<c04d9a49>] ext4_mb_load_buddy+0x9f/0x278 Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@kernel.org
-rw-r--r--fs/ext4/mballoc.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 48d606cd740f..6dea637b020a 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1326,6 +1326,8 @@ static void ext4_mb_check_limits(struct ext4_allocation_context *ac,
struct ext4_free_extent ex;
int max;
+ if (ac->ac_status == AC_STATUS_FOUND)
+ return;
/*
* We don't want to scan for a whole year
*/