From: Andrew Morton <akpm@osdl.org>
To: Badari Pulavarty <pbadari@us.ibm.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: 2.6.12-rc6-mm1 & 2K lun testing
Date: Fri, 17 Jun 2005 14:13:31 -0700 [thread overview]
Message-ID: <20050617141331.078e5f8f.akpm@osdl.org> (raw)
In-Reply-To: <42B2E7D2.9080705@us.ibm.com>
Badari Pulavarty <pbadari@us.ibm.com> wrote:
>
> > It shouldn't be necessary to do both. Either the patch or the tuning
> > should fix it. Please confirm.
> >
> > Also please determine whether the deep CFQ queue depth is a problem when
> > the VFS tuning/patching is in place.
> >
> > IOW: let's work out which of these three areas needs to be addressed.
> >
>
> Andrew,
>
> Sorry for not getting back earlier. I am running into weird problems.
> When running "dd" write tests to 2048 ext3 filesystems, just with your
> patch (no dirty ratio or CFS queue depth tuning), I see "buff"
> increasing instead of "cache" and I see "bi" instead of "bo".
> Whats going on here ?
Beats me. Are you sure you're not running a broken vmstat?
`buff' would increase if you were accidentally writing to /dev/sda1 rather
than /dev/sda1/some-filename, but I don't know why vmstat would be getting
confused over the direction of the I/O.
>
> procs -----------memory---------- ---swap-- -----io---- --system--
> ----cpu----
> r b swpd free buff cache si so bi bo in cs us
> sy id wa
> ..
> 2 0 4 6339920 42712 24884 0 0 0 19 413 1237 46
> 6 48 0
You're wordwrapping...
next prev parent reply other threads:[~2005-06-17 21:12 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-15 17:36 2.6.12-rc6-mm1 & 2K lun testing Badari Pulavarty
2005-06-15 18:30 ` Nick Piggin
2005-06-15 18:30 ` Badari Pulavarty
2005-06-15 19:02 ` Nick Piggin
2005-06-15 20:56 ` Badari Pulavarty
2005-06-16 1:48 ` Nick Piggin
2005-06-15 23:23 ` Dave Chinner
2005-06-15 21:39 ` Chen, Kenneth W
2005-06-15 22:35 ` Badari Pulavarty
2005-06-16 7:24 ` Andrew Morton
2005-06-16 19:50 ` Badari Pulavarty
2005-06-16 20:37 ` Andrew Morton
2005-06-16 23:43 ` Badari Pulavarty
2005-06-17 0:51 ` Andrew Morton
2005-06-17 15:10 ` Badari Pulavarty
2005-06-17 21:13 ` Andrew Morton [this message]
2005-06-22 0:34 ` 2.6.12-mm1 & 2K lun testing (JFS problem ?) Badari Pulavarty
2005-06-22 1:41 ` William Lee Irwin III
2005-06-22 16:23 ` Badari Pulavarty
2005-06-22 13:50 ` Dave Kleikamp
2005-06-22 16:56 ` Badari Pulavarty
2005-06-22 21:02 ` Badari Pulavarty
2005-06-16 22:42 ` 2.6.12-rc6-mm1 & 2K lun testing William Lee Irwin III
2005-06-16 22:25 ` Badari Pulavarty
2005-06-16 22:58 ` William Lee Irwin III
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