The patchset can be fetched from github: https://github.com/adam900710/linux/tree/delayed_bg_removal
It's based on v4.17-rc5 branch. This bug is reported from SUSE openQA, although it's pretty hard to hit in real world (even real world VM), it's believed block group auto removal (anyway, there isn't much thing can remove a chunk mapping in btrfs) could interfere with qgroup's search on commit root. Full details can be found in the 3rd patch. The patchset uses 2 submitted cleanup/refactor patches as basis, and the 3rd patch will ensure unused block group will only be deleted after current transaction is done. Qu Wenruo (3): btrfs: trace: Add trace points for unused block groups btrfs: Use btrfs_mark_bg_unused() to replace open code btrfs: Delayed empty block group auto removal to next transaction fs/btrfs/ctree.h | 2 ++ fs/btrfs/extent-tree.c | 62 ++++++++++++++++++++++++++---------- fs/btrfs/scrub.c | 8 +---- fs/btrfs/transaction.c | 7 ++++ fs/btrfs/transaction.h | 10 ++++++ include/trace/events/btrfs.h | 42 ++++++++++++++++++++++++ 6 files changed, 107 insertions(+), 24 deletions(-) -- 2.17.0 -- 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
