From: Dan Kegel <dank@alumni.caltech.edu>
To: rothwell@holly-springs.nc.us, linux-kernel@vger.kernel.org
Subject: Re: O_NONBLOCK, read(), select(), NFS, Ext2, etc.
Date: Fri, 12 Jan 2001 10:10:59 -0800 [thread overview]
Message-ID: <3A5F48B3.FC398B81@alumni.caltech.edu> (raw)
Michael Rothwell (rothwell@holly-springs.nc.us) wrote:
> How about using fcntl(), O_ASYNC and SIGIO?
Don't think that's supported for disk files yet, at least by the
kernel. glibc does aio emulation with threads, which isn't great.
> Or maybe a broader question:
> what's the preferred/working way to do async file i/o on Linux?
SGI has done lots of work on this, using kernel threads;
they don't have a patch yet for 2.4.0, but they do support
2.2.17 and 2.4.0-test10.
TUX uses async I/O, I think, but it's inside the kernel.
I hear plans are afoot for giving userspace async I/O that
avoids creating threads; that should be more scalable than
SGI's approach, if it ever happens.
See http://www.kegel.com/c10k.html#aio for links and a few notes.
- Dan
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/
next reply other threads:[~2001-01-12 18:55 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-12 18:10 Dan Kegel [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-01-12 15:18 Andries.Brouwer
2001-01-12 2:34 Michael Rothwell
2001-01-12 3:28 ` Chris Wedgwood
2001-01-12 9:40 ` Alan Cox
2001-01-12 14:55 ` Michael Rothwell
2001-01-12 16:34 ` Alexander V. Lukyanov
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=3A5F48B3.FC398B81@alumni.caltech.edu \
--to=dank@alumni.caltech.edu \
--cc=linux-kernel@vger.kernel.org \
--cc=rothwell@holly-springs.nc.us \
/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
all inboxes | Powered by JetHome®