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author | Yan Zheng <zheng.yan@oracle.com> | 2009-01-06 09:58:06 -0500 |
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committer | Chris Mason <chris.mason@oracle.com> | 2009-01-06 09:58:06 -0500 |
commit | 180591bcfed1a2cec048abb21d3dab840625caab (patch) | |
tree | 9bd247570ef8f3ed33afcb25bb365ccd707c8a73 /fs/locks.c | |
parent | 9ca03b997f71787e345951e6267fbd8eba14d49f (diff) |
Btrfs: Use btrfs_join_transaction to avoid deadlocks during snapshot creation
Snapshot creation happens at a specific time during transaction commit. We
need to make sure the code called by snapshot creation doesn't wait
for the running transaction to commit.
This changes btrfs_delete_inode and finish_pending_snaps to use
btrfs_join_transaction instead of btrfs_start_transaction to avoid deadlocks.
It would be better if btrfs_delete_inode didn't use the join, but the
call path that triggers it is:
btrfs_commit_transaction->create_pending_snapshots->
create_pending_snapshot->btrfs_lookup_dentry->
fixup_tree_root_location->btrfs_read_fs_root->
btrfs_read_fs_root_no_name->btrfs_orphan_cleanup->iput
This will be fixed in a later patch by moving the orphan cleanup to the
cleaner thread.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/locks.c')
0 files changed, 0 insertions, 0 deletions