if (!test_bit(BTRFS_FS_OPEN, &fs_info->flags))
return;
+ /*
+ * Long running balances can keep us blocked here for eternity, so
+ * simply skip deletion if we're unable to get the mutex.
+ */
+ if (!mutex_trylock(&fs_info->delete_unused_bgs_mutex))
+ return;
+
spin_lock(&fs_info->unused_bgs_lock);
while (!list_empty(&fs_info->unused_bgs)) {
int trimming;
btrfs_discard_cancel_work(&fs_info->discard_ctl, block_group);
- mutex_lock(&fs_info->delete_unused_bgs_mutex);
-
/* Don't want to race with allocators so take the groups_sem */
down_write(&space_info->groups_sem);
end_trans:
btrfs_end_transaction(trans);
next:
- mutex_unlock(&fs_info->delete_unused_bgs_mutex);
btrfs_put_block_group(block_group);
spin_lock(&fs_info->unused_bgs_lock);
}
spin_unlock(&fs_info->unused_bgs_lock);
+ mutex_unlock(&fs_info->delete_unused_bgs_mutex);
return;
flip_async: