Re: [PATCH v2 0/4] SMMUv3 CMD_SYNC optimisation

[Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>]

On Fri, Oct 13, 2017 at 08:05:21PM +0100, Will Deacon wrote:
> On Thu, Aug 31, 2017 at 02:44:24PM +0100, Robin Murphy wrote:
> > Since Nate reported a reasonable performance boost from the out-of-line
> > MSI polling in v1 [1], I've now implemented the equivalent for cons
> > polling as well - that has been boot-tested on D05 with some trivial I/O
> > and at least doesn't seem to lock up or explode. There's also a little
> > cosmetic tweaking to make the patches a bit cleaner as a series.
> > 
> > Robin.
> > 
> > [1] https://www.mail-archive.com/iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org/msg19657.html
> > 
> > Robin Murphy (5):
> >   iommu/arm-smmu-v3: Specialise CMD_SYNC handling
> >   iommu/arm-smmu-v3: Forget about cmdq-sync interrupt
> >   iommu/arm-smmu-v3: Use CMD_SYNC completion interrupt
> >   iommu/arm-smmu-v3: Poll for CMD_SYNC outside cmdq lock
> >   iommu/arm-smmu-v3: Use burst-polling for sync completion
> 
> What's this final mythical patch about? I don't see it in the series.
> 
> Anyway, the first two patches look fine to me, but this doesn't apply
> on top of my iommu/devel branch so they will need rebasing.

No idea what I was doing wrong on Friday, but the first two patches apply
cleanly now, so I'll push them out in a bit.

Sorry for the noise,

Will