Re: [PATCH 09/13] xfs/2304: version of generic/388 that run xfs_scrub -x for each iteration

[Christoph Hellwig <hch@lst.de>]

On Mon, Oct 05, 2026 at 08:20:57AM -0700, Darrick J. Wong wrote:
> I was about to repy "Sounds like a good idea for g388 and probably g475
> as well" but then I remembered something from my notes.  The two tests
> run without _check_filesystems on the assumption that accidental
> corruptions will multiply until either (a) the cycle_mount will fail or
> (b) the post-test _check_filesystems will have a lot to complain about.
> Doing the check every loop cycle reduces the number of log recoveries
> that we can do in a given SOAK_DURATION by a significant amount.
> 
> What if we ran $XFS_IO_PROG -c verifymedia once per loop if
> XFS_VERIFY_FILE_DATA?  That would avoid a full xfs_{repair,scrub} run
> (+ extra mount cycle) but catch problems earlier.

$XFS_IO_PROG -c verifymedia would also verify potentially unwritten
areas.  We'd still need the full xfs_scrub space map scan at least,
but I can look into an option to only do media verification in
scrub, which also sounds useful outside of just xfstests.