Patchset to solve the previous found deadlock and enhance mount options consistence.
Unlike previous pending_changes, which uses transaction commits to ensure mount option doesn't change during transaction. This patch use the RCU-like concept, which will copy the mount_opt from fs_info into btrfs_transaction, and each btrfs_test_opt() for specific mount option bit(SPACE_CACHE/INODE_MAP_CACHE) should be changed to btrfs_test_trans_opt(). So mount option during transaction won't be changed, and also, no extra read_only or freeze check is needed, the commit routine is also untouched. Qu Wenruo (5): Revert "btrfs: add support for processing pending changes" related commits btrfs: Make btrfs_parse_options() parse mount option in a atomic way btrfs: Introduce per-transaction mount_opt to keep mount option consistent during transaction. btrfs: Use btrfs_test_trans_opt() to handle SPACE_CACHE if it's under transaction protect. btrfs: Use btrfs_test_trans_opt() to handle INODE_CACHE if it's under transaction protect. fs/btrfs/ctree.h | 64 +++------------------- fs/btrfs/disk-io.c | 6 --- fs/btrfs/extent-tree.c | 2 +- fs/btrfs/free-space-cache.c | 2 +- fs/btrfs/inode-map.c | 5 +- fs/btrfs/super.c | 129 ++++++++++++++++++++++---------------------- fs/btrfs/sysfs.c | 34 +++++++----- fs/btrfs/transaction.c | 43 ++------------- fs/btrfs/transaction.h | 6 ++- 9 files changed, 107 insertions(+), 184 deletions(-) -- 2.2.2 -- 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