Hi folks, The following patches are fixes for recently discovered problems. I'd like to consider them all for a 6.4-rc merge, though really only patch 2 is a necessary recent regression fix. The first patch addresses a long standing buffer UAF during shutdown situations, where shutdown log item completions can race with CIL abort and iclog log item completions. The second patch addresses a small performance regression from the 6.3 allocator rewrite which is also a potential AGF-AGF deadlock vector as it allows out-of-order locking. The third patch is a change needed by patch 4, which I split out for clarity. By itself it does nothing. The fourth patch is a fix for a AGI->AGF->inode cluster buffer lock ordering deadlock. This was introduced when we started pinning inode cluster buffers in xfs_trans_log_inode() in 5.8 to fix long-standing inode reclaim blocking issues, but I've only seen it in the wild once on a system making heavy use of OVL and hence O_TMPFILE based operations. This has all passed through fstests without any issues being detected, but wider testing would be appreciated along with review. -Dave.
