From: Keith Busch <kbusch@kernel.org>
To: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Theodore Ts'o <tytso@mit.edu>,
lsf-pc@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org, linux-block@vger.kernel.org
Subject: Re: [LSF/MM/BPF TOPIC] Cloud storage optimizations
Date: Thu, 2 Mar 2023 20:29:38 -0700 [thread overview]
Message-ID: <ZAFpokeFjyalHK7Q@kbusch-mbp.dhcp.thefacebook.com> (raw)
In-Reply-To: <yq1356mh925.fsf@ca-mkp.ca.oracle.com>
On Thu, Mar 02, 2023 at 09:54:59PM -0500, Martin K. Petersen wrote:
> > For example, most cloud storage devices are doing read-ahead to try to
> > anticipate read requests from the VM. This can interfere with the
> > read-ahead being done by the guest kernel. So being able to tell
> > cloud storage device whether a particular read request is stemming
> > from a read-ahead or not.
>
> Indeed. In our experience the hints that work best are the ones which
> convey to the storage device why the I/O is being performed.
This may be a pretty far-out-there idea, but I think SSD BPF injection has
potentially higher payoff than mere hints. The below paper does it in kernel,
but imagine doing it on the device!
https://dl.acm.org/doi/pdf/10.1145/3458336.3465290
next prev parent reply other threads:[~2023-03-03 3:29 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-01 3:52 [LSF/MM/BPF TOPIC] Cloud storage optimizations Theodore Ts'o
2023-03-01 4:18 ` Gao Xiang
2023-03-01 4:40 ` Matthew Wilcox
2023-03-01 4:59 ` Gao Xiang
2023-03-01 4:35 ` Matthew Wilcox
2023-03-01 4:49 ` Gao Xiang
2023-03-01 5:01 ` Matthew Wilcox
2023-03-01 5:09 ` Gao Xiang
2023-03-01 5:19 ` Gao Xiang
2023-03-01 5:42 ` Matthew Wilcox
2023-03-01 5:51 ` Gao Xiang
2023-03-01 6:00 ` Gao Xiang
2023-03-02 3:13 ` Chaitanya Kulkarni
2023-03-02 3:50 ` Darrick J. Wong
2023-03-03 3:03 ` Martin K. Petersen
2023-03-02 20:30 ` Bart Van Assche
2023-03-03 3:05 ` Martin K. Petersen
2023-03-03 1:58 ` Keith Busch
2023-03-03 3:49 ` Matthew Wilcox
2023-03-03 11:32 ` Hannes Reinecke
2023-03-03 13:11 ` James Bottomley
2023-03-04 7:34 ` Matthew Wilcox
2023-03-04 13:41 ` James Bottomley
2023-03-04 16:39 ` Matthew Wilcox
2023-03-05 4:15 ` Luis Chamberlain
2023-03-05 5:02 ` Matthew Wilcox
2023-03-08 6:11 ` Luis Chamberlain
2023-03-08 7:59 ` Dave Chinner
2023-03-06 12:04 ` Hannes Reinecke
2023-03-06 3:50 ` James Bottomley
2023-03-04 19:04 ` Luis Chamberlain
2023-03-03 21:45 ` Luis Chamberlain
2023-03-03 22:07 ` Keith Busch
2023-03-03 22:14 ` Luis Chamberlain
2023-03-03 22:32 ` Keith Busch
2023-03-03 23:09 ` Luis Chamberlain
2023-03-16 15:29 ` Pankaj Raghav
2023-03-16 15:41 ` Pankaj Raghav
2023-03-03 23:51 ` Bart Van Assche
2023-03-04 11:08 ` Hannes Reinecke
2023-03-04 13:24 ` Javier González
2023-03-04 16:47 ` Matthew Wilcox
2023-03-04 17:17 ` Hannes Reinecke
2023-03-04 17:54 ` Matthew Wilcox
2023-03-04 18:53 ` Luis Chamberlain
2023-03-05 3:06 ` Damien Le Moal
2023-03-05 11:22 ` Hannes Reinecke
2023-03-06 8:23 ` Matthew Wilcox
2023-03-06 10:05 ` Hannes Reinecke
2023-03-06 16:12 ` Theodore Ts'o
2023-03-08 17:53 ` Matthew Wilcox
2023-03-08 18:13 ` James Bottomley
2023-03-09 8:04 ` Javier González
2023-03-09 13:11 ` James Bottomley
2023-03-09 14:05 ` Keith Busch
2023-03-09 15:23 ` Martin K. Petersen
2023-03-09 20:49 ` James Bottomley
2023-03-09 21:13 ` Luis Chamberlain
2023-03-09 21:28 ` Martin K. Petersen
2023-03-10 1:16 ` Dan Helmick
2023-03-10 7:59 ` Javier González
2023-03-08 19:35 ` Luis Chamberlain
2023-03-08 19:55 ` Bart Van Assche
2023-03-03 2:54 ` Martin K. Petersen
2023-03-03 3:29 ` Keith Busch [this message]
2023-03-03 4:20 ` Theodore Ts'o
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