From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-xfs@vger.kernel.org, linux-block@vger.kernel.org, hch@lst.de
Subject: Re: [PATCHSET 0/2] sync discard
Date: Wed, 2 May 2018 14:45:08 +0200 [thread overview]
Message-ID: <20180502124508.GD22857@lst.de> (raw)
In-Reply-To: <1525102372-8430-1-git-send-email-axboe@kernel.dk>
On Mon, Apr 30, 2018 at 09:32:50AM -0600, Jens Axboe wrote:
> We recently had a pretty severe perf regression with the XFS async
> discard. This small series add a SYNC issue discard flag, and also
> limits the chain size for sync discards. Patch 2 adds support for
> reverting XFS back to doign sync discards.
Please explain the hardware and workload that you see this with.
Also given that it is a hardware limitation a quirk limiting the
size of discard requests and/or number of outstanding discards
would be more useful than falling back to a broken mode of issueing
block commands.
next prev parent reply other threads:[~2018-05-02 12:42 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-30 15:32 [PATCHSET 0/2] sync discard Jens Axboe
2018-04-30 15:32 ` [PATCH 1/2] block: add BLKDEV_DISCARD_SYNC flag Jens Axboe
2018-04-30 15:32 ` [PATCH 2/2] xfs: add 'discard_sync' mount flag Jens Axboe
2018-04-30 17:19 ` Brian Foster
2018-04-30 18:07 ` Jens Axboe
2018-04-30 18:25 ` Luis R. Rodriguez
2018-04-30 18:31 ` Jens Axboe
2018-04-30 19:19 ` Eric Sandeen
2018-04-30 19:21 ` Jens Axboe
2018-04-30 19:57 ` Eric Sandeen
2018-04-30 19:58 ` Jens Axboe
2018-04-30 22:59 ` Eric Sandeen
2018-04-30 23:02 ` Jens Axboe
2018-04-30 19:18 ` Brian Foster
2018-04-30 21:31 ` Dave Chinner
2018-04-30 21:42 ` Jens Axboe
2018-04-30 22:28 ` Dave Chinner
2018-04-30 22:40 ` Jens Axboe
2018-04-30 23:00 ` Jens Axboe
2018-04-30 23:23 ` Dave Chinner
2018-05-01 11:11 ` Brian Foster
2018-05-01 15:23 ` Jens Axboe
2018-05-02 2:54 ` Martin K. Petersen
2018-05-02 14:20 ` Jens Axboe
2018-04-30 23:01 ` Darrick J. Wong
2018-05-02 12:45 ` Christoph Hellwig [this message]
2018-05-02 14:19 ` [PATCHSET 0/2] sync discard Jens Axboe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180502124508.GD22857@lst.de \
--to=hch@lst.de \
--cc=axboe@kernel.dk \
--cc=linux-block@vger.kernel.org \
--cc=linux-xfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).