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
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