Messages in this thread | | | From | Will Deacon <> | Subject | Re: [PATCH] iommu/arm-smmu-v3: Stop pre-zeroing batch commands | Date | Fri, 13 Aug 2021 15:33:47 +0100 |
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On Wed, 11 Aug 2021 23:49:26 +0800, John Garry wrote: > Pre-zeroing the batched commands structure is inefficient, as individual > commands are zeroed later in arm_smmu_cmdq_build_cmd(). The size is quite > large and commonly most commands won't even be used: > > struct arm_smmu_cmdq_batch cmds = {}; > 345c: 52800001 mov w1, #0x0 // #0 > 3460: d2808102 mov x2, #0x408 // #1032 > 3464: 910143a0 add x0, x29, #0x50 > 3468: 94000000 bl 0 <memset> > > [...]
Applied to will (for-joerg/arm-smmu/updates), thanks!
[1/1] iommu/arm-smmu-v3: Stop pre-zeroing batch commands https://git.kernel.org/will/c/fac956710ab0
Cheers, -- Will
https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev
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