luck/tmp_suning_uos_patched
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Btrfs: fix deadlock with free space handling and user transactions

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If an ioctl-initiated transaction is open, we can't force a commit during
the free space checks in order to free up pinned extents or else we
deadlock.  Just ENOSPC instead.

A more satisfying solution that reserves space for the entire user
transaction up front is forthcoming...

Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Sage Weil 2009-09-29 18:38:44 -04:00 committed by Chris Mason
parent 1ab86aedbc
commit dd7e0b7b02
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/extent-tree.c
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@ -3168,7 +3168,7 @@ int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
spin_unlock(&data_sinfo->lock);
/* commit the current transaction and try again */
if (!committed) {
if (!committed && !root->fs_info->open_ioctl_trans) {
committed = 1;
trans = btrfs_join_transaction(root, 1);
if (!trans)