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Date: Fri, 19 Sep 2008 19:21:09 +0900 From: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> To: joro@...tes.org Cc: fujita.tomonori@....ntt.co.jp, joerg.roedel@....com, iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org, mingo@...e.hu Subject: Re: [PATCH 03/23] AMD IOMMU: implement lazy IO/TLB flushing On Fri, 19 Sep 2008 08:29:46 +0200 Joerg Roedel <joro@...tes.org> wrote: > > > diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt > > > index c2e00ee..569527e 100644 > > > --- a/Documentation/kernel-parameters.txt > > > +++ b/Documentation/kernel-parameters.txt > > > @@ -888,6 +888,10 @@ and is between 256 and 4096 characters. It is defined in the file > > > nomerge > > > forcesac > > > soft > > > + fullflush > > > + Flush IO/TLB at every deallocation > > > + nofullflush > > > + Flush IO/TLB only when addresses are reused (default) > > > > I'm not sure about making 'nofullflush' a generic option. Enabling > > nofullflush option doesn't change anything. So what's the point of the > > option? > > Backwards compatability with the GART code. These two options are > basically just moved from the GART code to pci-dma.c. But otherwise its > pointless, I can remove it if everybody else agrees. The compatibility with the GART code doesn't mean that we need to have this pointless option as a common option. You can make 'fullflush' a common option and the meaningless 'nofullflush' can live in GART. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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