From: Gao Xiang <hsiangkao@redhat.com>
To: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: linux-xfs@vger.kernel.org, Christoph Hellwig <hch@infradead.org>,
Dave Chinner <david@fromorbit.com>
Subject: Re: [RFC PATCH] xfs: use log_incompat feature instead of speculate matching
Date: Mon, 24 Aug 2020 23:41:20 +0800 [thread overview]
Message-ID: <20200824154120.GA23868@xiangao.remote.csb> (raw)
In-Reply-To: <20200824150832.GV6096@magnolia>
On Mon, Aug 24, 2020 at 08:08:32AM -0700, Darrick J. Wong wrote:
> On Mon, Aug 24, 2020 at 04:34:02PM +0800, Gao Xiang wrote:
> > On Mon, Aug 24, 2020 at 04:19:00PM +0800, Gao Xiang wrote:
> > > From: Gao Xiang <hsiangkao@redhat.com>
> > >
> > > Use a log_incompat feature just to be safe.
> > > If the current mount is in RO state, it will defer
> > > to next RW remount.
> > >
> > > Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
> > > ---
> > >
> > > After some careful thinking, I think it's probably not working for
> > > supported V4 XFS filesystem. So, I think we'd probably insist on the
> > > previous way (correct me if I'm wrong)...
> > >
> > > (since xfs_sb_to_disk() refuses to set up any feature bits for non V5
> > > fses. That is another awkward setting here (doesn't write out/check
> > > feature bits for V4 even though using V4 sb reserved fields) and
> > > unless let V4 completely RO since this commit. )
> > >
> > > Just send out as a RFC patch. Not fully tested after I thought as above.
> >
> > Unless we also use sb_features2 for V4 filesystem to entirely
> > refuse to mount such V4 filesystem...
> > Some more opinions on this?
>
> Frankly, V4 is pretty old, so I wouldn't bother. We only build new
> features for V5 format.
Okay, let me go further with log_incompat (v5) and sb_features2 (v4)
later.
Thanks,
Gao Xiang
>
> --D
>
> > Thanks,
> > Gao Xiang
> >
>
next prev parent reply other threads:[~2020-08-24 15:43 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-12 9:25 [PATCH 00/13] xfs: in memory inode unlink log items Dave Chinner
2020-08-12 9:25 ` [PATCH 01/13] xfs: xfs_iflock is no longer a completion Dave Chinner
2020-08-18 23:44 ` Darrick J. Wong
2020-08-22 7:41 ` Christoph Hellwig
2020-08-12 9:25 ` [PATCH 02/13] xfs: add log item precommit operation Dave Chinner
2020-08-22 9:06 ` Christoph Hellwig
2020-08-12 9:25 ` [PATCH 03/13] xfs: factor the xfs_iunlink functions Dave Chinner
2020-08-18 23:49 ` Darrick J. Wong
2020-08-22 7:45 ` Christoph Hellwig
2020-08-12 9:25 ` [PATCH 04/13] xfs: arrange all unlinked inodes into one list Dave Chinner
2020-08-18 23:59 ` Darrick J. Wong
2020-08-19 0:45 ` Dave Chinner
2020-08-19 0:58 ` Gao Xiang
2020-08-22 9:01 ` Christoph Hellwig
2020-08-23 17:24 ` Gao Xiang
2020-08-24 8:19 ` [RFC PATCH] xfs: use log_incompat feature instead of speculate matching Gao Xiang
2020-08-24 8:34 ` Gao Xiang
2020-08-24 15:08 ` Darrick J. Wong
2020-08-24 15:41 ` Gao Xiang [this message]
2020-08-25 10:06 ` [PATCH] " Gao Xiang
2020-08-25 14:54 ` Darrick J. Wong
2020-08-25 15:30 ` Gao Xiang
2020-08-27 7:19 ` Christoph Hellwig
2020-08-12 9:25 ` [PATCH 05/13] xfs: add unlink list pointers to xfs_inode Dave Chinner
2020-08-19 0:02 ` Darrick J. Wong
2020-08-19 0:47 ` Dave Chinner
2020-08-22 9:03 ` Christoph Hellwig
2020-08-25 5:17 ` Dave Chinner
2020-08-27 7:21 ` Christoph Hellwig
2020-08-12 9:25 ` [PATCH 06/13] xfs: replace iunlink backref lookups with list lookups Dave Chinner
2020-08-19 0:13 ` Darrick J. Wong
2020-08-19 0:52 ` Dave Chinner
2020-08-12 9:25 ` [PATCH 07/13] xfs: mapping unlinked inodes is now redundant Dave Chinner
2020-08-19 0:14 ` Darrick J. Wong
2020-08-12 9:25 ` [PATCH 08/13] xfs: updating i_next_unlinked doesn't need to return old value Dave Chinner
2020-08-19 0:19 ` Darrick J. Wong
2020-08-12 9:25 ` [PATCH 09/13] xfs: validate the unlinked list pointer on update Dave Chinner
2020-08-19 0:23 ` Darrick J. Wong
2020-08-12 9:25 ` [PATCH 10/13] xfs: re-order AGI updates in unlink list updates Dave Chinner
2020-08-19 0:29 ` Darrick J. Wong
2020-08-19 1:01 ` Dave Chinner
2020-08-12 9:25 ` [PATCH 11/13] xfs: combine iunlink inode update functions Dave Chinner
2020-08-19 0:30 ` Darrick J. Wong
2020-08-12 9:25 ` [PATCH 12/13] xfs: add in-memory iunlink log item Dave Chinner
2020-08-19 0:35 ` Darrick J. Wong
2020-08-12 9:25 ` [PATCH 13/13] xfs: reorder iunlink remove operation in xfs_ifree Dave Chinner
2020-08-12 11:12 ` Gao Xiang
2020-08-19 0:45 ` Darrick J. Wong
2020-08-18 18:17 ` [PATCH 00/13] xfs: in memory inode unlink log items Darrick J. Wong
2020-08-18 20:01 ` Gao Xiang
2020-08-18 21:42 ` Dave Chinner
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