From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: Rampant ext3/4 corruption on 2.6.34-rc7 with VIVT ARM (Marvell 88f5182)
Date: Fri, 14 May 2010 18:59:27 +0100 [thread overview]
Message-ID: <20100514175927.GA18107@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <20100514174153.GB10133@shareable.org>
On Fri, May 14, 2010 at 06:41:53PM +0100, Jamie Lokier wrote:
> Russell King - ARM Linux wrote:
> > On Thu, May 13, 2010 at 08:47:11AM +1000, Benjamin Herrenschmidt wrote:
> > > Now, in the case at hand, which is my ARM based NAS, I believe this
> > > is non cache-coherent and thus uses cache flush ops. I don't know ARM
> > > well enough but I would expect these to be implicit barriers. Russell ?
> > > Nico ?
> >
> > ARMv5 doesn't have a weak memory ordering model, and doesn't have any
> > memory barrier instructions.
>
> It does have buffered writes, doesn't it? Are they always flushed by
> the cache flush ops?
Surprisingly, for DMA it's something we've always done. Odd that.
next prev parent reply other threads:[~2010-05-14 17:59 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-11 9:23 Rampant ext3/4 corruption on 2.6.34-rc7 with VIVT ARM (Marvell 88f5182) Benjamin Herrenschmidt
2010-05-11 10:16 ` Jamie Lokier
2010-05-11 10:47 ` Benjamin Herrenschmidt
2010-05-11 10:57 ` Benjamin Herrenschmidt
2010-05-11 11:14 ` Shilimkar, Santosh
2010-05-12 22:21 ` Jamie Lokier
2010-05-12 22:47 ` Benjamin Herrenschmidt
2010-05-12 23:08 ` Russell King - ARM Linux
2010-05-14 17:41 ` Jamie Lokier
2010-05-14 17:59 ` Russell King - ARM Linux [this message]
2010-05-12 23:41 ` James Bottomley
2010-05-13 0:18 ` Benjamin Herrenschmidt
2010-05-13 15:39 ` James Bottomley
2010-05-13 23:53 ` Benjamin Herrenschmidt
2010-05-13 3:12 ` FUJITA Tomonori
2010-05-13 4:42 ` Benjamin Herrenschmidt
2010-05-12 15:00 ` Jan Kara
2010-05-12 22:13 ` Benjamin Herrenschmidt
2010-05-13 0:15 ` Benjamin Herrenschmidt
2010-05-13 15:12 ` Jan Kara
2010-05-13 21:33 ` Benjamin Herrenschmidt
2010-05-13 23:51 ` Benjamin Herrenschmidt
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