From: Chris Mason <mason@suse.com>
To: Andrew Morton <akpm@osdl.org>
Cc: arjanv@redhat.com, axboe@suse.de, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ext3 barrier bits
Date: Sat, 22 May 2004 15:15:32 -0400 [thread overview]
Message-ID: <1085253331.9467.4982.camel@watt.suse.com> (raw)
In-Reply-To: <20040522013313.6cb15a4b.akpm@osdl.org>
On Sat, 2004-05-22 at 04:33, Andrew Morton wrote:
> Arjan van de Ven <arjanv@redhat.com> wrote:
> >
> >
> > > - Does the kernel tell you if your disk doesn't supoprt barriers? ie:
> > > how does the user know if it's working or not?
> >
> > ... and how do you know your disk isn't lying and ignoring the barriers?
> >
>
> If some benchmark slows down when barriers are enabled then that's a pretty
> good indicator. I don't know what benchmark that might be though.
synctest -t 20 -n 1 -f dir, should show a performance hit when barriers
are on.
-chris
next prev parent reply other threads:[~2004-05-22 19:15 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20040521093207.GA1952@suse.de>
[not found] ` <20040521023807.0de63c7a.akpm@osdl.org>
[not found] ` <20040521100234.GK1952@suse.de>
[not found] ` <20040521235044.6160cccb.akpm@osdl.org>
[not found] ` <20040522073540.GO1952@suse.de>
2004-05-22 8:11 ` [PATCH] ext3 barrier bits Andrew Morton
2004-05-22 8:24 ` Arjan van de Ven
2004-05-22 8:33 ` Andrew Morton
2004-05-22 19:15 ` Chris Mason [this message]
2004-05-22 8:43 ` Jens Axboe
2004-05-22 8:42 ` Jens Axboe
2004-05-22 19:31 ` Chris Mason
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