t; > linux-kernel@vger.kernel.org
> > Subject: RE: [Xen-devel] [PATCH] xen/swiotlb: Exchange to contiguous memory
> > for map_sg hook
> >
> > >>> On 20.12.12 at 02:23, "Xu, Dongxiao" wrote:
> > > Sorry, maybe I am still not describing
>>> "Xu, Dongxiao" 01/07/13 8:17 AM >>>
> From: Jan Beulich [mailto:jbeul...@suse.com]
> >>> On 20.12.12 at 02:23, "Xu, Dongxiao" wrote:
>> > Take the libata case as an example, the static DMA buffer locates
>> > (dev->link->ap->sector_buf , here we use Data Structure B in the graph) in
>> > the
> -Original Message-
> From: Jan Beulich [mailto:jbeul...@suse.com]
> Sent: Thursday, December 20, 2012 4:56 PM
> To: Xu, Dongxiao
> Cc: xen-de...@lists.xen.org; Konrad Rzeszutek Wilk;
> linux-kernel@vger.kernel.org
> Subject: RE: [Xen-devel] [PATCH] xen/swiotlb: E
>>> On 20.12.12 at 02:23, "Xu, Dongxiao" wrote:
> Sorry, maybe I am still not describing this issue clearly.
No, at least I understood you the way you re-describe below.
> Take the libata case as an example, the static DMA buffer locates
> (dev->link->ap->sector_buf , here we use Data Structure
> -Original Message-
> From: Konrad Rzeszutek Wilk [mailto:konrad.w...@oracle.com]
> Sent: Thursday, December 20, 2012 4:09 AM
> To: Jan Beulich
> Cc: Xu, Dongxiao; xen-de...@lists.xen.org; linux-kernel@vger.kernel.org
> Subject: Re: [Xen-devel] [PATCH] xen/swiotlb: Exch
On Wed, Dec 12, 2012 at 09:38:23AM +, Jan Beulich wrote:
> >>> On 12.12.12 at 02:03, "Xu, Dongxiao" wrote:
> >> From: Konrad Rzeszutek Wilk [mailto:konrad.w...@oracle.com]
> >> On Tue, Dec 11, 2012 at 06:39:35AM +, Xu, Dongxiao wrote:
> >> > > From: Konrad Rzeszutek Wilk [mailto:konrad.w..
>>> On 12.12.12 at 02:03, "Xu, Dongxiao" wrote:
>> From: Konrad Rzeszutek Wilk [mailto:konrad.w...@oracle.com]
>> On Tue, Dec 11, 2012 at 06:39:35AM +, Xu, Dongxiao wrote:
>> > > From: Konrad Rzeszutek Wilk [mailto:konrad.w...@oracle.com]
>> > > What if this check was done in the routines that
> -Original Message-
> From: Jan Beulich [mailto:jbeul...@suse.com]
> Sent: Thursday, December 06, 2012 9:38 PM
> To: Xu, Dongxiao
> Cc: xen-de...@lists.xen.org; konrad.w...@oracle.com;
> linux-kernel@vger.kernel.org
> Subject: Re: [Xen-devel] [PATCH] xen/swiotlb: E
On Thu, Dec 06, 2012 at 01:37:41PM +, Jan Beulich wrote:
> >>> On 06.12.12 at 14:08, Dongxiao Xu wrote:
> > While mapping sg buffers, checking to cross page DMA buffer is
> > also needed. If the guest DMA buffer crosses page boundary, Xen
> > should exchange contiguous memory for it.
> >
> >
>>> On 06.12.12 at 14:08, Dongxiao Xu wrote:
> While mapping sg buffers, checking to cross page DMA buffer is
> also needed. If the guest DMA buffer crosses page boundary, Xen
> should exchange contiguous memory for it.
>
> Besides, it is needed to backup the original page contents
> and copy it
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