From: Daniel McNeil <daniel@osdl.org>
To: RaTao <ratao@toxyn.org>
Cc: Andrew Morton <akpm@osdl.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: linux-2.6.0-test2-mm4 O_DIRECT
Date: 06 Aug 2003 15:36:54 -0700 [thread overview]
Message-ID: <1060209414.1903.7.camel@ibm-c.pdx.osdl.net> (raw)
In-Reply-To: <3F3173D5.8000705@toxyn.org>
O_DIRECT also works for me on ext3 using regular write and async i/o
using 512-byte i/o.
Is your buffer alignment correct?
O_DIRECT requires a 512-byte aligned buffer.
Daniel
On Wed, 2003-08-06 at 14:32, RaTao wrote:
> Hi!
>
> I've correct my (don't know how) misspelled subject :)
>
> Andrew Morton wrote:
>
> [..snip..]
> >
> >
> > It works OK here.
> >
> >
> >>- vmstat doesn't show bi/bo for O_DIRECT's disk access.
> >
> >
> > It does here.
> >
>
> Maybe goofed somewhere. I can't test it again today, I'll do it tomorrow.
>
>
> >
> > I'd be suspecting your test app: is it checking the return value of all
> > syscalls?
>
> I'll double check.
> Thanks,
>
> Ratao
>
>
>
> -
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next prev parent reply other threads:[~2003-08-06 22:37 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-06 9:52 linux-2.6.0-linux-kernel@vger.kernel.orgtest2-mm4 O_DIRECT RaTao
2003-08-06 19:17 ` Andrew Morton
2003-08-06 21:32 ` linux-2.6.0-test2-mm4 O_DIRECT RaTao
2003-08-06 22:36 ` Daniel McNeil [this message]
2003-08-07 1:55 ` RaTao
2003-08-07 2:18 ` 2.6.0-test2, compact flash, IDE, and kobject errors J.C. Wren
2003-08-07 2:38 ` Bartlomiej Zolnierkiewicz
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