Commits
Will Deacon committed 587e6c10a7c
iommu/arm-smmu-v3: Reduce contention during command-queue insertion The SMMU command queue is a bottleneck in large systems, thanks to the spin_lock which serialises accesses from all CPUs to the single queue supported by the hardware. Attempt to improve this situation by moving to a new algorithm for inserting commands into the queue, which is lock-free on the fast-path. Tested-by: Ganapatrao Kulkarni <gkulkarni@marvell.com> Signed-off-by: Will Deacon <will@kernel.org>