From: Joel Becker <Joel.Becker@oracle.com>
To: Matthew Wilcox <matthew@wil.cx>
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Filesystem hints to storage
Date: Thu, 22 Jul 2010 12:15:41 -0700 [thread overview]
Message-ID: <20100722191541.GA12376@mail.oracle.com> (raw)
In-Reply-To: <20100722180854.GB22009@parisc-linux.org>
On Thu, Jul 22, 2010 at 12:08:54PM -0600, Matthew Wilcox wrote:
> For Enterprise NVMHCI, the working group is looking at refining these
> hints. Are there any hints that people would like to see added or
> removed from the list in NVMHCI 1.0?
>
> I think there are some hints that are hard for the filesystem to know
> itself, never mind pass down, so it'd be good to remove them to reduce
> the complexity. Contrariwise, there are some hints I think the filesystem
> could pass down that aren't in the spec today, such as the flags from
> madvise (random access vs sequential access) and whether the access is
> for fs metadata or application data.
If we're looking at the filesystem interface to all of this, I
would think these hints could be used by non-SSD storage as well.
Not only would a storage array benefit from knowing about random vs
sequential access, but expected redundancy hints would be huge in
managing utilization.
Joel
--
Life's Little Instruction Book #396
"Never give anyone a fruitcake."
Joel Becker
Consulting Software Developer
Oracle
E-mail: joel.becker@oracle.com
Phone: (650) 506-8127
next prev parent reply other threads:[~2010-07-22 19:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-22 18:08 Filesystem hints to storage Matthew Wilcox
2010-07-22 19:15 ` Joel Becker [this message]
2010-07-22 19:45 ` Alan Cox
2010-07-26 15:40 ` James Bottomley
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=20100722191541.GA12376@mail.oracle.com \
--to=joel.becker@oracle.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=matthew@wil.cx \
/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).