[PATCHSET v28.0 0/4] xfs: prepare repair for bulk loading

Darrick J. Wong
2023-11-24T23:45:20Z

Hi all,

Before we start merging the online repair functions, let's improve the
bulk loading code a bit. First, we need to fix a misinteraction between
the AIL and the btree bulkloader wherein the delwri at the end of the
bulk load fails to queue a buffer for writeback if it happens to be on
the AIL list.

Second, we introduce a defer ops barrier object so that the process of
reaping blocks after a repair cannot queue more than two extents per EFI
log item. This increases our exposure to leaking blocks if the system
goes down during a reap, but also should prevent transaction overflows,
which result in the system going down.

Third, we change the bulkloader itself to copy multiple records into a
block if possible, and add some debugging knobs so that developers can
control the slack factors, just like they can do for xfs_repair.

If you're going to start using this code, I strongly recommend pulling
from my git trees, which are linked below.

This has been running on the djcloud for months with no problems. Enjoy!
Comments and questions are, as always, welcome.

--D

kernel git tree:
https://git.kernel.org/cgit/linux/kernel/git/djwong/xfs-linux.git/log/?h=repair-prep-for-bulk-loading

xfsprogs git tree:
https://git.kernel.org/cgit/linux/kernel/git/djwong/xfsprogs-dev.git/log/?h=repair-prep-for-bulk-loading
---
fs/xfs/libxfs/xfs_btree.c | 2 +
fs/xfs/libxfs/xfs_btree.h | 3 ++
fs/xfs/libxfs/xfs_btree_staging.c | 67 +++++++++++++++++++++++++------------
fs/xfs/libxfs/xfs_btree_staging.h | 25 +++++++++++---
fs/xfs/scrub/newbt.c | 11 ++++--
fs/xfs/xfs_buf.c | 47 ++++++++++++++++++++++++--
fs/xfs/xfs_buf.h | 1 +
fs/xfs/xfs_globals.c | 12 +++++++
fs/xfs/xfs_sysctl.h | 2 +
fs/xfs/xfs_sysfs.c | 54 ++++++++++++++++++++++++++++++
10 files changed, 189 insertions(+), 35 deletions(-)