Re: [PATCH] iommu/vt-d: Fix scatterlist offset handling

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On Thu, 16 Nov 2017 13:09:33 -0800
"Raj, Ashok" <ashok.raj@xxxxxxxxx> wrote:

> Hi Alex
> 
> On Thu, Nov 16, 2017 at 02:32:44PM -0700, Alex Williamson wrote:
> > On Wed, 15 Nov 2017 15:54:56 -0800
> > Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx> wrote:
> >   
> > > Hi Alex and all,
> > > 
> > > Just wondering if you could merge Robin's patch for the next rc. From
> > > all our testing, this seems to be a solid fix and should be included in
> > > the stable releases as well.  
> > 
> > Hi Jacob,
> > 
> > Sorry, this wasn't on my radar, I only scanned for patches back through
> > about when Joerg refreshed his next branch (others on the list speak up
> > if I didn't pickup your patches for the v4.15 merge window).
> > 
> > This patch makes sense to me and I'm glad you were able to work through
> > the anomaly Harsh saw in testing as an unrelated issue, but...
> > 
> > 
> > What do we do about this?  I certainly can't rip out large page support
> > and put a stable tag on the patch.  I'm not really spotting what's
> > wrong with large page support here, other than the comment about it
> > being a mess.  Suggestions?  Thanks,
> >   
> 
> Largepage seems to work and i don't think we need to rip it out. When
> Harsh tested it at one point we thought disabling super-page seemed to make
> the problem go away. Jacob tested and we still saw the need for Robin's patch.
> 
> Yes, the function looks humongous but i don't think we should wait for that 
> before this merge.

Ok.  Who wants to toss in review and testing sign-offs?  Clearly
there's been a lot more eyes and effort on this patch than reflected in
the original posting.  I'll add a stable cc.  Thanks,

Alex



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