[PATCH RESEND 6.6 v2 0/5] Backport of XFS umount hang fixes

[Siddh Raman Pant]

Backport of this series:
https://lore.kernel.org/all/20250625224957.1436116-1-david@xxxxxxxxxxxxx/

I have added information in commit message upon conflict resolutions.

v2: Address Sasha's comments to v1 in the below mail:
https://lore.kernel.org/stable/2026-10-01-1-daily-reply-0012-re-xfs-umount-hang-backports@xxxxxxxxxx/

xfstests_xfs testing results:
	Generic:
		Ran: 001 to 771 (672 tests; gaps)

		Failures before changes:
			Count: 7
			IDs: 363, 365, 633, 645, 696, 697, 753

		Failures after changes:
			Count: 7
			IDs: 363, 365, 633, 645, 696, 697, 753

		No new success or failure after changes.

	XFS:
		Ran: 001 to 789 (311 tests; gaps)

		Failures before changes:
			Count: 1
			IDs: 300

		Failures after changes:
			Count: 1
			IDs: 300

		No new success or failure after changes.

Thanks,
Siddh

Dave Chinner (5):
  xfs: xfs_ifree_cluster vs xfs_iflush_shutdown_abort deadlock
  xfs: catch stale AGF/AGF metadata
  xfs: rearrange code in xfs_buf_item.c
  xfs: factor out stale buffer item completion
  xfs: fix unmount hang with unflushable inodes stuck in the AIL

 fs/xfs/libxfs/xfs_alloc.c  |  46 ++++--
 fs/xfs/libxfs/xfs_ialloc.c |  32 +++-
 fs/xfs/xfs_buf_item.c      | 299 ++++++++++++++++++++++---------------
 fs/xfs/xfs_buf_item.h      |   3 +-
 fs/xfs/xfs_icache.c        |   8 +
 fs/xfs/xfs_inode.c         |   2 +-
 6 files changed, 256 insertions(+), 134 deletions(-)

-- 
2.53.0