Hi Dave, Please pull this branch with changes for xfs. As usual, I did a test-merge with the main upstream branch as of a few minutes ago, and didn't see any conflicts. Please let me know if you encounter any problems. --D The following changes since commit 1fc7a0597d237c17b6501f8c33b76d3eaaae9079: xfs: don't take the MMAPLOCK when scrubbing file metadata (2023-04-11 19:00:22 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git tags/scrub-merge-bmap-records-6.4_2023-04-12 for you to fetch changes up to 1e59fdb7d6157ff685a250e0873a015a2b16a4f2: xfs: don't call xchk_bmap_check_rmaps for btree-format file forks (2023-04-11 19:00:26 -0700) ---------------------------------------------------------------- xfs: merge bmap records for faster scrubs [v24.5] I started looking into performance problems with the data fork scrubber in generic/333, and noticed a few things that needed improving. First, due to design reasons, it's possible for file forks btrees to contain multiple contiguous mappings to the same physical space. Instead of checking each ondisk mapping individually, it's much faster to combine them when possible and check the combined mapping because that's fewer trips through the rmap btree, and we can drop this check-around behavior that it does when an rmapbt lookup produces a record that starts before or ends after a particular bmbt mapping. Second, I noticed that the bmbt scrubber decides to walk every reverse mapping in the filesystem if the file fork is in btree format. This is very costly, and only necessary if the inode repair code had to zap a fork to convince iget to work. Constraining the full-rmap scan to this one case means we can skip it for normal files, which drives the runtime of this test from 8 hours down to 45 minutes (observed with realtime reflink and rebuild-all mode.) Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx> ---------------------------------------------------------------- Darrick J. Wong (6): xfs: change bmap scrubber to store the previous mapping xfs: accumulate iextent records when checking bmap xfs: split xchk_bmap_xref_rmap into two functions xfs: alert the user about data/attr fork mappings that could be merged xfs: split the xchk_bmap_check_rmaps into a predicate xfs: don't call xchk_bmap_check_rmaps for btree-format file forks fs/xfs/libxfs/xfs_bmap.h | 2 +- fs/xfs/scrub/bmap.c | 379 ++++++++++++++++++++++++++++++----------------- 2 files changed, 242 insertions(+), 139 deletions(-)
