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Date: Thu, 4 Sep 2008 10:31:24 +0200 From: Andi Kleen <andi@...stfloor.org> To: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> Cc: andi@...stfloor.org, joerg.roedel@....com, mingo@...hat.com, tglx@...utronix.de, hpa@...or.com, linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org, kamezawa.hiroyu@...fujitsu.com, tony.luck@...el.com Subject: Re: [PATCH] swiotlb: fix dma_alloc_coherent allocation failures with swiotlb > Even if it's tree, only each IOMMU knows what's the best. That's the > point of these changes to remove the tricks in arch/x86/pci-dma.c and > let IOMMUs do what they want. Duplicating all the code. Sounds great. > > Also there's usually the problem that not all busses are translated, > > e.g. Calgary used to do that so for e.g. dev == NULL allocations you had > > to use these fallback algorithms anyways. > > dev == NULL isn't a minor thing. It's just using the fallback > device. You still have to handle it fully. -Andi -- 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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