From: Andi Kleen <ak@suse.de>
To: Jens Axboe <axboe@suse.de>
Cc: David Chinner <dgc@sgi.com>, Neil Brown <neilb@suse.de>,
linux-kernel@vger.kernel.org, akpm@osdl.org
Subject: Re: RFC - how to balance Dirty+Writeback in the face of slow writeback.
Date: 18 Aug 2006 20:57:31 +0200 [thread overview]
Message-ID: <p73hd0998is.fsf@verdi.suse.de> (raw)
In-Reply-To: <20060818070314.GE798@suse.de>
Jens Axboe <axboe@suse.de> writes:
> On Thu, Aug 17 2006, Andrew Morton wrote:
> > It seems that the many-writers-to-different-disks workloads don't happen
> > very often. We know this because
> >
> > a) The 2.4 performance is utterly awful, and I never saw anybody
> > complain and
>
> Talk to some of the people that used DVD-RAM devices (or other
> excruciatingly slow writers) on their system, and they would disagree
> violently :-)
I hit this recently while doing backups to a slow external USB disk.
The system was quite unusable (some commands blocked for over a minute)
-Andi
next prev parent reply other threads:[~2006-08-18 18:57 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-14 23:40 RFC - how to balance Dirty+Writeback in the face of slow writeback Neil Brown
2006-08-15 8:06 ` Andrew Morton
2006-08-15 23:00 ` David Chinner
2006-08-17 4:08 ` Neil Brown
2006-08-17 6:14 ` Andrew Morton
2006-08-17 12:36 ` Trond Myklebust
2006-08-17 15:14 ` Andrew Morton
2006-08-17 16:22 ` Trond Myklebust
2006-08-18 5:49 ` Andrew Morton
2006-08-18 10:43 ` Nikita Danilov
2006-08-18 0:11 ` David Chinner
2006-08-18 6:29 ` Andrew Morton
2006-08-18 7:03 ` Jens Axboe
2006-08-18 7:11 ` Andrew Morton
2006-08-18 18:57 ` Andi Kleen [this message]
2006-08-21 0:35 ` Neil Brown
2006-08-21 3:15 ` David Chinner
2006-08-21 7:24 ` Neil Brown
2006-08-21 13:51 ` Jens Axboe
2006-08-25 4:36 ` Neil Brown
2006-08-25 6:37 ` Jens Axboe
2006-08-28 1:28 ` David Chinner
2006-08-25 13:16 ` Trond Myklebust
2006-08-27 8:21 ` Neil Brown
2006-08-21 14:28 ` David Chinner
2006-08-25 5:24 ` Neil Brown
2006-08-28 1:55 ` David Chinner
2006-08-21 7:47 ` Andi Kleen
2006-08-18 7:07 ` Neil Brown
2006-08-17 22:17 ` David Chinner
2006-08-17 3:59 ` Neil Brown
2006-08-17 6:22 ` Andrew Morton
2006-08-17 8:36 ` Jens Axboe
2006-08-17 13:21 ` Trond Myklebust
2006-08-17 15:30 ` Andrew Morton
2006-08-17 16:18 ` Trond Myklebust
2006-08-18 5:34 ` Andrew Morton
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