From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "Pekka Enberg" <penberg@cs.helsinki.fi>
Cc: "Linus Torvalds" <torvalds@linux-foundation.org>,
"Neil Romig" <neil@romig.demon.co.uk>,
linux-kernel@vger.kernel.org, hyoshiok@miraclelinux.com,
"Andrew Morton" <akpm@linux-foundation.org>
Subject: Re: File corruption when using kernels 2.6.18+
Date: Wed, 3 Oct 2007 21:30:11 +0100 [thread overview]
Message-ID: <20071003213011.0962c5c5@the-village.bc.nu> (raw)
In-Reply-To: <84144f020710031235r29986ceaj3260e8271eee6ddb@mail.gmail.com>
On Wed, 3 Oct 2007 22:35:24 +0300
"Pekka Enberg" <penberg@cs.helsinki.fi> wrote:
> Hi Linus,
>
> On 10/3/07, Linus Torvalds <torvalds@linux-foundation.org> wrote:
> > I would bet that the reason the intel-optimized memcpy triggers this is
> > that the non-temporal stores just means that you go out directly on the
> > bus, and it probably just shows a weakness in the chipset or bus that
> > doesn't show with the normal cacheline accesses.
>
> But that should show up with memtest too, no?
Not neccessarily. The old VIA memory copying bug only showed up with
prefetching and mmx store patterns. That was a hardware flaw that took
extreme memory utilisation to show up - so it does occur but thats not to
say it is the cause
Alan
next prev parent reply other threads:[~2007-10-03 20:25 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-30 15:40 Neil Romig
2007-09-30 16:29 ` Pekka Enberg
2007-10-02 21:05 ` Neil Romig
2007-10-03 5:18 ` Pekka Enberg
2007-10-03 18:42 ` Neil Romig
2007-10-03 18:48 ` Pekka Enberg
2007-10-03 19:22 ` Linus Torvalds
2007-10-03 19:35 ` Pekka Enberg
2007-10-03 19:54 ` Linus Torvalds
2007-10-04 1:11 ` Hiro Yoshioka
2007-10-03 20:30 ` Alan Cox [this message]
2007-10-04 18:34 ` Neil Romig
2007-10-02 22:30 ` Chuck Ebbert
[not found] <fa.VCoGTwbB+qeNlkBJ24MiuXcGSRA@ifi.uio.no>
[not found] ` <fa.R+FhT6IGmV/dDweUt/MdSeA5YbQ@ifi.uio.no>
[not found] ` <fa.7MxTIt/ik0uRFN/lMWUasYV/JyE@ifi.uio.no>
[not found] ` <fa.YJ4uCPzXT5TQElSosyz98cpuMSc@ifi.uio.no>
[not found] ` <fa.Tp9UUX9EYprQyLg0shgH1YG9DDM@ifi.uio.no>
[not found] ` <fa.PzpJEEoLXfC+eOQZjTWjdf9vdnE@ifi.uio.no>
2007-10-04 2:59 ` Robert Hancock
2007-10-04 3:39 ` Linus Torvalds
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