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Message-ID: <20080627175247.GH10197@8bytes.org> Date: Fri, 27 Jun 2008 19:52:47 +0200 From: Joerg Roedel <joro@...tes.org> To: Muli Ben-Yehuda <muli@...ibm.com> Cc: Andi Kleen <andi@...stfloor.org>, Adrian Bunk <bunk@...nel.org>, Joerg Roedel <joerg.roedel@....com>, tglx@...utronix.de, mingo@...hat.com, linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org, bhavna.sarathy@....com, Sebastian.Biemueller@....com, robert.richter@....com, Ben-Ami Yassour1 <BENAMI@...ibm.com> Subject: Re: [PATCH 01/34] AMD IOMMU: add Kconfig entry On Fri, Jun 27, 2008 at 01:44:15PM -0400, Muli Ben-Yehuda wrote: > On Fri, Jun 27, 2008 at 07:40:35PM +0200, Joerg Roedel wrote: > > > Yes. As I said, this is for the non-isolating case. For the > > isolation case (which is needed for protection) it is harder to > > optimize. But there I think about some sort of lazy IOMMU TLB > > flushing. The flushing and 'wait for the flush to finish' is the > > most expensive part in the mapping and unmapping code path. But this > > needs some experiments. > > Agreed. The paper I just posted to the iommu mailing list has some > ideas and experimental data. Cool. I wasn't aware if that paper. I will read it next week. Thanks for the pointer to it. Joerg -- 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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