diff options
| author | Josef Bacik <jbacik@fb.com> | 2014-09-18 11:27:17 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-10-30 09:40:09 -0700 |
| commit | 206b329c9cc70b9a3305177064dee0e209d224dd (patch) | |
| tree | 73d15ea5ad0640ec0c65c45e416bd4848be7aeca | |
| parent | aee223787acc8ad97d72a91a54f26f81375b2c38 (diff) | |
Btrfs: don't do async reclaim during log replay
commit f6acfd50110b335c7af636cf1fc8e55319cae5fc upstream.
Trying to reproduce a log enospc bug I hit a panic in the async reclaim code
during log replay. This is because we use fs_info->fs_root as our root for
shrinking and such. Technically we can use whatever root we want, but let's
just not allow async reclaim while we're doing log replay. Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/btrfs/extent-tree.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 8edb9fcc38d..feff017a47d 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4508,7 +4508,13 @@ again: space_info->flush = 1; } else if (!ret && space_info->flags & BTRFS_BLOCK_GROUP_METADATA) { used += orig_bytes; - if (need_do_async_reclaim(space_info, root->fs_info, used) && + /* + * We will do the space reservation dance during log replay, + * which means we won't have fs_info->fs_root set, so don't do + * the async reclaim as we will panic. + */ + if (!root->fs_info->log_root_recovering && + need_do_async_reclaim(space_info, root->fs_info, used) && !work_busy(&root->fs_info->async_reclaim_work)) queue_work(system_unbound_wq, &root->fs_info->async_reclaim_work); |