From: "Darrick J. Wong" <djwong@kernel.org>
To: Christoph Hellwig <hch@lst.de>
Cc: cem@kernel.org, stable@vger.kernel.org, linux-xfs@vger.kernel.org
Subject: Re: [PATCH 5/6] xfs: write the rg superblock when fixing it
Date: Mon, 13 Jul 2026 14:58:57 -0700 [thread overview]
Message-ID: <20260713215857.GG7195@frogsfrogsfrogs> (raw)
In-Reply-To: <20260713064105.GA29416@lst.de>
On Mon, Jul 13, 2026 at 08:41:05AM +0200, Christoph Hellwig wrote:
> On Tue, Jul 07, 2026 at 10:04:26PM -0700, Darrick J. Wong wrote:
> > From: Darrick J. Wong <djwong@kernel.org>
> >
> > The rtgroup superblock fixer should write the rtgroup superblock.
> > LOLLM noticed this, oops. :/
>
> Looks good:
>
> Reviewed-by: Christoph Hellwig <hch@lst.de>
>
> Can we get a testcase to verify this?
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?
Also, this patch should be calling xfs_log_sb *after* xfs_trans_getsb,
so I'll fix that for the repost.
--D
next prev parent reply other threads:[~2026-07-13 21:58 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-08 5:03 [PATCHSET] xfs: LLM-inspired bug fixes, part 1 Darrick J. Wong
2026-07-08 5:03 ` [PATCH 1/6] xfs: don't replace the wrong part of the cow fork Darrick J. Wong
2026-07-08 9:12 ` Christoph Hellwig
2026-07-08 15:25 ` Darrick J. Wong
2026-07-08 17:57 ` Darrick J. Wong
2026-07-09 4:47 ` Christoph Hellwig
2026-07-09 16:45 ` Darrick J. Wong
2026-07-08 5:03 ` [PATCH 2/6] xfs: don't wrap around quota ids in dqiterate Darrick J. Wong
2026-07-08 9:14 ` Christoph Hellwig
2026-07-08 5:03 ` [PATCH 3/6] xfs: use rtrefcount btree cursor in xchk_xref_is_rt_cow_staging Darrick J. Wong
2026-07-08 9:15 ` Christoph Hellwig
2026-07-08 5:04 ` [PATCH 4/6] xfs: use the rt version of the cow staging checker Darrick J. Wong
2026-07-08 9:16 ` Christoph Hellwig
2026-07-08 5:04 ` [PATCH 5/6] xfs: write the rg superblock when fixing it Darrick J. Wong
2026-07-13 6:41 ` Christoph Hellwig
2026-07-13 21:58 ` Darrick J. Wong [this message]
2026-07-14 5:20 ` Christoph Hellwig
2026-07-14 17:59 ` Darrick J. Wong
2026-07-08 5:04 ` [PATCH 6/6] xfs: grab rtrmap btree when checking rgsuper Darrick J. Wong
2026-07-08 9:16 ` Christoph Hellwig
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