Re: [PATCH/RESEND] scsi.mq: Added use_cmd_list flag in scsi_host to reduce lock contention

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On 08/20/14 15:54, Kashyap.Desai@xxxxxxxxxxxxx wrote:
> Comment provided by Bart Van and Chris H is addressed in this patch.
> 
> Add use_cmd_list flag in scsi_host to indicate scs.mq stack
> to keep track of cmd_list per sdev. 
> 
> Default behaviour is not to keep track of cmd_list per sdev, as this may introduce
> lock contention. (overhead is more on multi-node NUMA.)
> 
> Patch is tested using megaraid_sas driver with "use_cmd_list" value set to 1 and 0.
> Added MAINTAINER of Adaptec to verify changes.
> 
> Signed-off-by: Kashyap Desai <kashyap.desai@xxxxxxxxxxxxx>

Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>

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