From: "Stephen C. Tweedie" <sct@redhat.com>
To: Dan Maas <dmaas@dcine.com>
Cc: linux-kernel@vger.kernel.org, cj@cjcj.com, bart@jukie.net,
Stephen Tweedie <sct@redhat.com>
Subject: Re: Asynchronous IO
Date: Thu, 19 Apr 2001 19:19:04 +0100 [thread overview]
Message-ID: <20010419191904.A1444@redhat.com> (raw)
In-Reply-To: <009801c0c3f6$69d45c70$0701a8c0@morph>
In-Reply-To: <009801c0c3f6$69d45c70$0701a8c0@morph>; from dmaas@dcine.com on Fri, Apr 13, 2001 at 04:45:07AM -0400
Hi,
On Fri, Apr 13, 2001 at 04:45:07AM -0400, Dan Maas wrote:
> IIRC the problem with implementing asynchronous *disk* I/O in Linux today is
> that the filesystem code assumes synchronous I/O operations that block the
> whole process/thread. So implementing "real" asynch I/O (without the
> overhead of creating a process context for each operation) would require
> re-writing the filesystems as non-blocking state machines. Last I heard this
> was a long-term goal, but nobody's done the work yet
SGI and Ben LaHaise both have kernel async IO functionality working,
and Ingo Molnar's Tux code has support for doing certain filesystem
lookup operations asynchronously too.
--Stephen
next prev parent reply other threads:[~2001-04-20 11:18 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-13 8:45 Asynchronous IO Dan Maas
2001-04-14 2:00 ` Christopher Smith
2001-04-19 18:19 ` Stephen C. Tweedie [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-04-12 15:40 Asynchronous io CJ
2001-04-12 16:22 ` Bart Trojanowski
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