These three fixes for the tree mod log should go into the next rc pull request to mainline. I suggest adding them to stable as well, as we did with the previous tree mod log patch.
The first patch fixes logging of root split operations. The second one fixes access to the root within the tree mod log functions, which weren't correctly honoring rcu locking. The third is a fix correcting the order of free and unlock. With the snapshot aware defrag patches we added in 3.9, these fixes are also important for users not using qgroups. Concerning qgroups, there is at least one more issue to be solved: The qgroup's expectations how tree mod log increases its sequence numbers doesn't fit with what the tree mod log code is actually doing. Estimated size of that fix is larger than what should go into the rc commits or into stable, that one will be coming for 3.10. With these three patches applied, I've been running my tests for more than a day without any issues, while without, it takes only minutes to trigger a BUG_ON or WARN_ON. Jan Schmidt (3): Btrfs: fix tree mod log regression on root split operations Btrfs: fix accessing the root pointer in tree mod log functions Btrfs: fix unlock after free on rewinded tree blocks fs/btrfs/ctree.c | 111 ++++++++++++++++++++++++++++------------------------- 1 files changed, 59 insertions(+), 52 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
