linux-kernel - Re: [GIT PULL] xen: swiotlb support for Xen dom0

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Date:	Mon, 11 May 2009 09:57:57 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Xen-devel <xen-devel@...ts.xensource.com>
Subject: Re: [GIT PULL] xen: swiotlb support for Xen dom0

Ingo Molnar wrote:
> * Jeremy Fitzhardinge <jeremy@...p.org> wrote:
>
>   
>> Hi Ingo,
>>
>> This branch adds the swiotlb hooks for Xen dom0.  We use swiotlb 
>> to handle various device drivers which assume that multipage DMA 
>> transfers which are contigious in kernel memory are also 
>> contigious in machine memory (mostly lower-performance devices, as 
>> high-performance ones already do a good job of scatter-gather).
>>
>> Following Fujita's suggestion, these changes remove a lot of the 
>> placeholder stubs in arch/x86/kernel/pci-swiotlb.c and moves them 
>> into the Xen-specific arch/x86/xen/pci-swiotlb.c.  (It still 
>> relies on overriding the weak functions defined in lib/swiotlb.c.)
>>
>> The following changes since commit 2af252ab26150b4411889c9eaf1af4c5bf03de78:
>>   Jeremy Fitzhardinge (1):
>>         xen: checkpatch cleanups
>>     
>
> Would be nice to have a pull request for this with Fujita-san's acks 
> embedded in the commits, and with a tree based against tip:x86/xen.
>   

I will regenerate the branch with the acks (and Joerg made some comments 
which I'll address too).

    J
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