Messages in this thread | | | Date | Mon, 13 Apr 2015 11:49:44 +0200 | From | Christoph Hellwig <> | Subject | Re: [PATCH 4/6] mpt2sas: store scsi io tracker data in the scsi request |
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On Tue, Apr 07, 2015 at 11:18:38AM -0600, Jens Axboe wrote: > Instead of storing the IO tracker structure in a separate list > that we need to pop/push to on every submit and complete (and > lock), store it in the pdu associated with a request. This is > possible on scsi-mq only, and further cuts the spinlock associated > time for higher IOPS IO workloads. At 100K IOPS, this effectively > cuts the locking time in half.
As mentioned before please call scsi_init_shared_tag_map and use your new code path for the !mq case as well.
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