From: Ingo Molnar <mingo@elte.hu>
To: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: yinghai@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH -tip] x86: fix iommu=soft boot option
Date: Wed, 25 Nov 2009 10:10:26 +0100 [thread overview]
Message-ID: <20091125091026.GA11117@elte.hu> (raw)
In-Reply-To: <20091125180517P.fujita.tomonori@lab.ntt.co.jp>
* FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> wrote:
> On Wed, 25 Nov 2009 00:54:34 -0800
> Yinghai Lu <yinghai@kernel.org> wrote:
>
> > only remember that SLES 9 SP3 (?) at some point has problem with AMD
> > 10h ( quad core version) when memory > 4 g (with USB controller ?)
> > because the gart code only check K8 device id, and didn't check 10h
> > device id. so gart iommu is not used. and happenly swiotlb code has
> > problem with that kernel version.
> >
> > thinking we should keep old behavior, until some day we can remove
> > them all.
>
> Why? We are talking about changing 2.6.33 behavior. swiotlb in 2.6.33
> should be the safe option.
If that behavior was relied on for suspected (or real) bugs in the
swiotlb code then i agree that we should do this change. (and fix any
bugs if they still occur.)
Ingo
next prev parent reply other threads:[~2009-11-25 9:10 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-24 23:46 FUJITA Tomonori
2009-11-24 23:55 ` Yinghai Lu
2009-11-25 0:05 ` FUJITA Tomonori
2009-11-25 8:18 ` Ingo Molnar
2009-11-25 8:54 ` Yinghai Lu
2009-11-25 9:05 ` FUJITA Tomonori
2009-11-25 9:10 ` Ingo Molnar [this message]
2009-11-25 9:45 ` Yinghai Lu
2009-11-25 11:03 ` FUJITA Tomonori
2009-11-25 22:33 ` Yinghai Lu
2009-11-27 7:29 ` FUJITA Tomonori
2009-11-27 7:45 ` Yinghai Lu
2009-11-27 8:06 ` FUJITA Tomonori
2009-12-01 7:42 ` Yinghai Lu
2009-12-02 5:44 ` FUJITA Tomonori
2009-12-02 6:57 ` Yinghai Lu
2009-12-02 7:25 ` FUJITA Tomonori
2009-12-02 7:55 ` Yinghai Lu
2009-12-02 8:07 ` FUJITA Tomonori
2009-12-08 0:24 ` FUJITA Tomonori
2009-12-08 0:51 ` Yinghai Lu
2009-11-25 10:17 ` Joerg Roedel
2009-11-25 13:30 ` [tip:core/iommu] x86: Fix " tip-bot for FUJITA Tomonori
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