From: Ingo Molnar <mingo@elte.hu>
To: Joerg Roedel <joerg.roedel@amd.com>
Cc: mingo@redhat.com, tglx@linutronix.de, hpa@zytor.com,
linux-kernel@vger.kernel.org, fujita.tomonori@lab.ntt.co.jp
Subject: Re: [PATCH 3/3] x86/iommu: use __GFP_ZERO instead of memset for GART
Date: Sat, 27 Sep 2008 20:18:55 +0200 [thread overview]
Message-ID: <20080927181855.GA11147@elte.hu> (raw)
In-Reply-To: <20080927181438.GF1108@elte.hu>
another thing:
How hard would it be to add an CONFIG_IOMMU_DEBUG option that forces as
many DMA requests to go via the IOMMU as possible?
This slows things down of course so it's only for debugging - but it
also makes sure that we utilize the IOMMU code to the maximum - which is
not normally the case.
Would be nice to have it .config driven (default-disabled), so that
-tip's randconfig testing can stumble upon it every now and then. I've
got GART test-systems - this way we could find certain types of IOMMU
breakages sooner.
Ingo
next prev parent reply other threads:[~2008-09-27 18:19 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-25 10:13 [PATCH 0/3] some small GART cleanups Joerg Roedel
2008-09-25 10:13 ` [PATCH 1/3] x86/iommu: make GART driver checkpatch clean Joerg Roedel
2008-09-25 10:13 ` [PATCH 2/3] x86/iommu: convert GART need_flush to bool Joerg Roedel
2008-09-25 10:13 ` [PATCH 3/3] x86/iommu: use __GFP_ZERO instead of memset for GART Joerg Roedel
2008-09-25 10:20 ` Ingo Molnar
2008-09-25 10:42 ` Joerg Roedel
2008-09-27 18:14 ` Ingo Molnar
2008-09-27 18:18 ` Ingo Molnar [this message]
2008-09-28 18:06 ` FUJITA Tomonori
2008-09-28 19:34 ` Joerg Roedel
2008-09-29 8:56 ` Ingo Molnar
2008-09-29 14:11 ` FUJITA Tomonori
2008-09-30 11:03 ` Ingo Molnar
2008-09-30 20:53 ` H. Peter Anvin
2008-09-28 14:48 ` FUJITA Tomonori
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