Re: [PATCH 5/6] xfs: write the rg superblock when fixing it

On Mon, Jul 13, 2026 at 02:58:57PM -0700, Darrick J. Wong wrote:
> Hrmm.  Right now both superblock scrubbers don't do much for group 0,
> because both buffers are pinned to the xfs_mount, so they assume that
> there's no need to check anything.  However, the ondisk super could have
> gotten corrupted (or blown away by fdisk), in which case an immediate
> crash could render the filesystem unmountable.
> 
> So, I could (a) teach the super scrubbers to read the primary / rt
> super; and (b) teach them both to log the superblock and bwrite it
> immediately to shorten the window in which this could happen.
> 
> What do you think?

I guess the only sensible time to scrub the sb would be early during
mount? 

> Also, this patch should be calling xfs_log_sb *after* xfs_trans_getsb,
> so I'll fix that for the repost.

Oops.