From: Christoph Hellwig <hch@lst.de>
To: John Garry <john.g.garry@oracle.com>
Cc: chandan.babu@oracle.com, djwong@kernel.org, dchinner@redhat.com,
hch@lst.de, viro@zeniv.linux.org.uk, brauner@kernel.org,
jack@suse.cz, linux-xfs@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
catherine.hoang@oracle.com, martin.petersen@oracle.com
Subject: Re: [PATCH v2 00/13] forcealign for xfs
Date: Sat, 6 Jul 2024 09:53:53 +0200 [thread overview]
Message-ID: <20240706075353.GA15212@lst.de> (raw)
In-Reply-To: <20240705162450.3481169-1-john.g.garry@oracle.com>
On Fri, Jul 05, 2024 at 04:24:37PM +0000, John Garry wrote:
> The actual forcealign patches are the same in this series, modulo an
> attempt for a fix in xfs_bunmapi_align().
>
> Why forcealign?
> In some scenarios to may be required to guarantee extent alignment and
> granularity.
>
> For example, for atomic writes, the maximum atomic write unit size would
> be limited at the extent alignment and granularity, guaranteeing that an
> atomic write would not span data present in multiple extents.
>
> forcealign may be useful as a performance tuning optimization in other
> scenarios.
From previous side discussion I know Dave disagrees, but given how
much pain the larger than FSB rtextents have caused I'm very skeptical
if taking this on is the right tradeoff.
next prev parent reply other threads:[~2024-07-06 7:53 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-05 16:24 [PATCH v2 00/13] forcealign for xfs John Garry
2024-07-05 16:24 ` [PATCH v2 01/13] xfs: only allow minlen allocations when near ENOSPC John Garry
2024-07-05 16:24 ` [PATCH v2 02/13] xfs: always tail align maxlen allocations John Garry
2024-07-05 16:24 ` [PATCH v2 03/13] xfs: simplify extent allocation alignment John Garry
2024-07-05 16:24 ` [PATCH v2 04/13] xfs: make EOF allocation simpler John Garry
2024-08-06 18:58 ` Darrick J. Wong
2024-07-05 16:24 ` [PATCH v2 05/13] xfs: introduce forced allocation alignment John Garry
2024-07-05 16:24 ` [PATCH v2 06/13] xfs: align args->minlen for " John Garry
2024-07-05 16:24 ` [PATCH v2 07/13] xfs: Introduce FORCEALIGN inode flag John Garry
2024-07-11 2:59 ` Darrick J. Wong
2024-07-11 3:59 ` Christoph Hellwig
2024-07-11 7:17 ` John Garry
2024-07-11 23:33 ` Dave Chinner
2024-07-11 23:20 ` Dave Chinner
2024-07-12 4:56 ` Christoph Hellwig
2024-07-18 8:53 ` John Garry
2024-07-23 10:11 ` John Garry
2024-07-23 14:42 ` Christoph Hellwig
2024-07-23 15:01 ` John Garry
2024-07-23 22:26 ` Darrick J. Wong
2024-07-26 14:14 ` John Garry
2024-07-23 23:38 ` Dave Chinner
2024-07-24 0:04 ` Darrick J. Wong
2024-07-24 18:50 ` John Garry
2024-07-24 7:39 ` John Garry
2024-07-05 16:24 ` [PATCH v2 08/13] xfs: Do not free EOF blocks for forcealign John Garry
2024-07-06 7:56 ` Christoph Hellwig
2024-07-08 1:44 ` Dave Chinner
2024-07-08 7:36 ` John Garry
2024-07-08 11:12 ` Dave Chinner
2024-07-08 14:41 ` John Garry
2024-07-09 7:41 ` Christoph Hellwig
2024-07-05 16:24 ` [PATCH v2 09/13] xfs: Update xfs_inode_alloc_unitsize() " John Garry
2024-07-05 16:24 ` [PATCH v2 10/13] xfs: Unmap blocks according to forcealign John Garry
2024-07-06 7:58 ` Christoph Hellwig
2024-07-08 14:48 ` John Garry
2024-07-09 7:46 ` Christoph Hellwig
2024-07-17 15:24 ` John Garry
2024-07-17 16:42 ` Christoph Hellwig
2024-07-09 9:57 ` Dave Chinner
2024-07-09 11:19 ` Christoph Hellwig
2024-07-05 16:24 ` [PATCH v2 11/13] xfs: Only free full extents for forcealign John Garry
2024-07-06 7:59 ` Christoph Hellwig
2024-07-05 16:24 ` [PATCH v2 12/13] xfs: Don't revert allocated offset " John Garry
2024-07-05 16:24 ` [PATCH v2 13/13] xfs: Enable file data forcealign feature John Garry
2024-07-06 7:53 ` Christoph Hellwig [this message]
2024-07-08 7:48 ` [PATCH v2 00/13] forcealign for xfs John Garry
2024-07-09 7:48 ` Christoph Hellwig
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