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| author | Will Deacon <will@kernel.org> | 2019-07-02 18:16:25 +0200 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2019-08-08 14:31:54 +0200 |
| commit | 587e6c10a7ce89a5924fdbeff2ec524fbd6a124b (patch) | |
| tree | 6cc02601cd05efcfebb712a740a22cea60784e1e /COPYING | |
| parent | iommu/arm-smmu-v3: Operate directly on low-level queue where possible (diff) | |
| download | linux-587e6c10a7ce89a5924fdbeff2ec524fbd6a124b.tar.xz linux-587e6c10a7ce89a5924fdbeff2ec524fbd6a124b.zip | |
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>
Diffstat (limited to 'COPYING')
0 files changed, 0 insertions, 0 deletions