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From: Dave Chinner <david@fromorbit.com>
To: "Pankaj Raghav (Samsung)" <kernel@pankajraghav.com>
Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	mcgrof@kernel.org, gost.dev@samsung.com,
	akpm@linux-foundation.org, kbusch@kernel.org, djwong@kernel.org,
	chandan.babu@oracle.com, p.raghav@samsung.com,
	linux-kernel@vger.kernel.org, hare@suse.de, willy@infradead.org,
	linux-mm@kvack.org
Subject: Re: [RFC v2 13/14] xfs: add an experimental CONFIG_XFS_LBS option
Date: Wed, 14 Feb 2024 09:45:02 +1100	[thread overview]
Message-ID: <Zcvw7hcMsOSCrCvg@dread.disaster.area> (raw)
In-Reply-To: <gsxwuko2bmajg7wshcxx26p5afmzi6hpvc5u6oecp5slnybdr6@fdky2ksbpvki>

On Tue, Feb 13, 2024 at 10:54:07PM +0100, Pankaj Raghav (Samsung) wrote:
> On Wed, Feb 14, 2024 at 08:19:23AM +1100, Dave Chinner wrote:
> > On Tue, Feb 13, 2024 at 10:37:12AM +0100, Pankaj Raghav (Samsung) wrote:
> > > From: Pankaj Raghav <p.raghav@samsung.com>
> > > 
> > > Add an experimental CONFIG_XFS_LBS option to enable LBS support in XFS.
> > > Retain the ASSERT for PAGE_SHIFT if CONFIG_XFS_LBS is not enabled.
> > > 
> > > Signed-off-by: Pankaj Raghav <p.raghav@samsung.com>
> > 
> > NAK.
> > 
> > There it no reason for this existing - the same code is run
> > regardless of the state of this config variable just with a
> > difference in min folio order. All it does is increase the test
> > matrix arbitrarily - now we have two kernel configs we have to test
> > and there's no good reason for doing that.
> 
> I did not have this CONFIG in the first round but I thought it might
> help retain the existing behaviour until we deem the feature stable.
> 
> But I get your point. So we remove this CONFIG and just have an
> experimental warning during mount when people are using the LBS support?

Yes.

-Dave.
-- 
Dave Chinner
david@fromorbit.com

  reply	other threads:[~2024-02-13 22:45 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-02-13  9:36 [RFC v2 00/14] enable bs > ps in XFS Pankaj Raghav (Samsung)
2024-02-13  9:37 ` [RFC v2 01/14] fs: Allow fine-grained control of folio sizes Pankaj Raghav (Samsung)
2024-02-13 12:03   ` Hannes Reinecke
2024-02-13 16:34   ` Darrick J. Wong
2024-02-13 21:05     ` Pankaj Raghav (Samsung)
2024-02-13 21:29       ` Darrick J. Wong
2024-02-14 19:00         ` Matthew Wilcox
2024-02-15 10:34           ` Pankaj Raghav (Samsung)
2024-02-14 18:49   ` Matthew Wilcox
2024-02-15 10:21     ` Pankaj Raghav (Samsung)
2024-02-13  9:37 ` [RFC v2 02/14] filemap: align the index to mapping_min_order in the page cache Pankaj Raghav (Samsung)
2024-02-13 12:20   ` Hannes Reinecke
2024-02-13 21:13     ` Pankaj Raghav (Samsung)
2024-02-13 22:00   ` Dave Chinner
2024-02-13  9:37 ` [RFC v2 03/14] filemap: use mapping_min_order while allocating folios Pankaj Raghav (Samsung)
2024-02-13 14:58   ` Hannes Reinecke
2024-02-13 16:38   ` Darrick J. Wong
2024-02-13 22:05   ` Dave Chinner
2024-02-14 10:13     ` Pankaj Raghav (Samsung)
2024-02-13  9:37 ` [RFC v2 04/14] readahead: set file_ra_state->ra_pages to be at least mapping_min_order Pankaj Raghav (Samsung)
2024-02-13 14:59   ` Hannes Reinecke
2024-02-13 16:46   ` Darrick J. Wong
2024-02-13 22:09   ` Dave Chinner
2024-02-14 13:32     ` Pankaj Raghav (Samsung)
2024-02-14 13:53       ` Pankaj Raghav (Samsung)
2024-02-13  9:37 ` [RFC v2 05/14] readahead: align index to mapping_min_order in ondemand_ra and force_ra Pankaj Raghav (Samsung)
2024-02-13 15:00   ` Hannes Reinecke
2024-02-13 16:46   ` Darrick J. Wong
2024-02-13 22:29   ` Dave Chinner
2024-02-14 15:10     ` Pankaj Raghav (Samsung)
2024-02-13  9:37 ` [RFC v2 06/14] readahead: rework loop in page_cache_ra_unbounded() Pankaj Raghav (Samsung)
2024-02-13 16:47   ` Darrick J. Wong
2024-02-13  9:37 ` [RFC v2 07/14] readahead: allocate folios with mapping_min_order in ra_(unbounded|order) Pankaj Raghav (Samsung)
2024-02-13 15:01   ` Hannes Reinecke
2024-02-13 16:47   ` Darrick J. Wong
2024-02-13  9:37 ` [RFC v2 08/14] mm: do not split a folio if it has minimum folio order requirement Pankaj Raghav (Samsung)
2024-02-13 15:02   ` Hannes Reinecke
2024-02-13  9:37 ` [RFC v2 09/14] mm: Support order-1 folios in the page cache Pankaj Raghav (Samsung)
2024-02-13 15:03   ` Hannes Reinecke
2024-02-13  9:37 ` [RFC v2 10/14] iomap: fix iomap_dio_zero() for fs bs > system page size Pankaj Raghav (Samsung)
2024-02-13 15:06   ` Hannes Reinecke
2024-02-13 16:30   ` Darrick J. Wong
2024-02-13 21:27     ` Pankaj Raghav (Samsung)
2024-02-13 21:30       ` Darrick J. Wong
2024-02-14 15:13         ` Pankaj Raghav (Samsung)
2024-02-13  9:37 ` [RFC v2 11/14] xfs: expose block size in stat Pankaj Raghav (Samsung)
2024-02-13 16:27   ` Darrick J. Wong
2024-02-13 21:32     ` Pankaj Raghav (Samsung)
2024-02-13  9:37 ` [RFC v2 12/14] xfs: make the calculation generic in xfs_sb_validate_fsb_count() Pankaj Raghav (Samsung)
2024-02-13 16:26   ` Darrick J. Wong
2024-02-13 21:48     ` Pankaj Raghav (Samsung)
2024-02-13 22:44       ` Dave Chinner
2024-02-14 15:51         ` Pankaj Raghav (Samsung)
2024-02-13  9:37 ` [RFC v2 13/14] xfs: add an experimental CONFIG_XFS_LBS option Pankaj Raghav (Samsung)
2024-02-13 16:39   ` Darrick J. Wong
2024-02-13 21:19   ` Dave Chinner
2024-02-13 21:54     ` Pankaj Raghav (Samsung)
2024-02-13 22:45       ` Dave Chinner [this message]
2024-02-13  9:37 ` [RFC v2 14/14] xfs: enable block size larger than page size support Pankaj Raghav (Samsung)
2024-02-13 16:20   ` Darrick J. Wong
2024-02-14 16:40     ` Pankaj Raghav (Samsung)
2024-02-13 21:34   ` Dave Chinner
2024-02-14 16:35     ` Pankaj Raghav (Samsung)
2024-02-15 22:17       ` Dave Chinner

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