linux-kernel - Re: [GIT PULL] AMD IOMMU updates for 2.6.28

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Message-Id: <20080919195042S.fujita.tomonori@lab.ntt.co.jp>
Date:	Fri, 19 Sep 2008 19:51:11 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	joerg.roedel@....com
Cc:	fujita.tomonori@....ntt.co.jp, mingo@...e.hu,
	linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] AMD IOMMU updates for 2.6.28

On Fri, 19 Sep 2008 12:39:23 +0200
Joerg Roedel <joerg.roedel@....com> wrote:

> On Fri, Sep 19, 2008 at 07:28:13PM +0900, FUJITA Tomonori wrote:
> > On Fri, 19 Sep 2008 12:07:11 +0200
> > Joerg Roedel <joerg.roedel@....com> wrote:
> > 
> > > Hi Ingo,
> > > 
> > > please pull the updates for the AMD IOMMU driver for the 2.6.28 merge
> > > window. Most of the patches had been sent to LKML for review and got
> > > comments. One patch touches the GART driver and was added after an
> > > objection with a patch previously in this series. Please pull.
> > > 
> > > The following changes since commit 74546a8cd9a4e2c26a15a534f0be2f9cc08ae675:
> > >   Ingo Molnar (1):
> > >         Revert "fix warning in: "x86: HPET_MSI Initialise per-cpu HPET timers""
> > > 
> > > are available in the git repository at:
> > > 
> > >   git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu.git iommu-updates-2.6.28
> > > 
> > > FUJITA Tomonori (1):
> > >       AMD IOMMU: avoid unnecessary low zone allocation in alloc_coherent
> > > 
> > > Joerg Roedel (24):
> > >       AMD IOMMU: check for invalid device pointers
> > >       AMD IOMMU: move TLB flushing to the map/unmap helper functions
> > >       x86: move GART TLB flushing options to generic code
> > 
> > As I wrote, I don't think that this GART patch is the right approach.
> 
> I don't thinks its clean to leave nofullflush in GART code and move
> fullflush to generic code only.

It's not clean for GART but clean for other IOMMUs.


> If we move something then both. But feel
> free to submit a patch that removes the nofullflush option. I would not
> disagree with that.

I'm not sure we can remove an option that we added. If we can, please
remove it now. There is no point to make the meaningless option
generic.

If you don't like it, please add 'nofullflush' option as AMD IOMMU
option for now. As long as AMD IOMMU uses the same option name, we can
clean up them later if necessary.
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