On 2018/8/30 19:18, John Garry wrote:
> On 19/08/2018 08:51, Zhen Lei wrote:
>> spin_unlock_irqrestore(>cmdq.lock, flags);
>
> I find something like this adds support for combining CMD_SYNC commands for
> regular polling mode:
>
> @@ -569,6 +569,7 @@ struct arm_smmu_device {
>
On 19/08/2018 08:51, Zhen Lei wrote:
More than two CMD_SYNCs maybe adjacent in the command queue, and the first
one has done what others want to do. Drop the redundant CMD_SYNCs can
improve IO performance especially under the pressure scene.
I did the statistics in my test environment, the
More than two CMD_SYNCs maybe adjacent in the command queue, and the first
one has done what others want to do. Drop the redundant CMD_SYNCs can
improve IO performance especially under the pressure scene.
I did the statistics in my test environment, the number of CMD_SYNCs can
be reduced about
