From: will.deacon@arm.com (Will Deacon) Date: Fri, 13 Oct 2017 20:05:22 +0100 Subject: [PATCH v2 0/4] SMMUv3 CMD_SYNC optimisation In-Reply-To: References: Message-ID: <20171013190521.GD30572@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Robin, 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 at lists.linux-foundation.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. Cheers, Will