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| author | liubo <liubo2009@cn.fujitsu.com> | 2011-07-27 09:49:18 +0000 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2011-08-01 14:30:44 -0400 |
| commit | ff1f2b4407454d926d8b143bf37e4dce66026a28 (patch) | |
| tree | f40720d71285ade24fb6a7f7bcdd442806d5f37e | |
| parent | 61cfea9bb84d41b09e59822c33b3eb27acc48358 (diff) | |
| download | linux-ff1f2b4407454d926d8b143bf37e4dce66026a28.tar.bz2 | |
Btrfs: fix oops while writing data to SSD partitions
Here I have a two SSD-partitions btrfs, and they are defaultly set to
"data=raid0, metadata=raid1", then I try to fill my btrfs partition
till "No space left on device", via "dd if=/dev/zero of=/mnt/btrfs/tmp".
I get an oops panic from kernel BUG at fs/btrfs/extent-tree.c:5199!, which
refers to find_free_extent's
BUG_ON(index != get_block_group_index(block_group));
In SSD mode, in order to find enough space to alloc, we may check the
block_group cache which has been checked sometime before, but the index is not
updated, where it hits the BUG_ON.
Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Acked-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
| -rw-r--r-- | fs/btrfs/extent-tree.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index a4db88da125e..b172b7fa4889 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -5079,7 +5079,9 @@ have_block_group: * group is does point to and try again */ if (!last_ptr_loop && last_ptr->block_group && - last_ptr->block_group != block_group) { + last_ptr->block_group != block_group && + index <= + get_block_group_index(last_ptr->block_group)) { btrfs_put_block_group(block_group); block_group = last_ptr->block_group; |