On Tue, Aug 19, 2014 at 9:36 PM, Christoph Hellwig wrote:
> On Tue, Aug 19, 2014 at 03:51:42AM +0530, Kashyap Desai wrote:
>> I read this comment and find that very few drivers are using this
>> cmd_list. I think if we remove this cmd_list, performance will scale as I
>> am seeing major contenti
On Tue, Aug 19, 2014 at 03:51:42AM +0530, Kashyap Desai wrote:
> I read this comment and find that very few drivers are using this
> cmd_list. I think if we remove this cmd_list, performance will scale as I
> am seeing major contention in this lock.
> Just thought to ping you to see if this is kn
On Tue, Aug 19, 2014 at 3:51 AM, Kashyap Desai
wrote:
>
> > -Original Message-
> > From: linux-scsi-ow...@vger.kernel.org [mailto:linux-scsi-
> > ow...@vger.kernel.org] On Behalf Of Christoph Hellwig
> > Sent: Friday, July 18, 2014 3:43 PM
> > To: James Bottomley; linux-scsi@vger.kernel.or
> -Original Message-
> From: linux-scsi-ow...@vger.kernel.org [mailto:linux-scsi-
> ow...@vger.kernel.org] On Behalf Of Christoph Hellwig
> Sent: Friday, July 18, 2014 3:43 PM
> To: James Bottomley; linux-scsi@vger.kernel.org
> Cc: Jens Axboe; Bart Van Assche; Mike Christie; Martin K. Peter
> "Christoph" == Christoph Hellwig writes:
Christoph> This patch adds support for an alternate I/O path in the scsi
Christoph> midlayer which uses the blk-mq infrastructure instead of the
Christoph> legacy request code.
Reviewed-by: Martin K. Petersen
--
Martin K. Petersen Oracle Lin
On Wed, Jul 16, 2014 at 06:13:21AM -0500, Mike Christie wrote:
> I see the request timer is started before calling queue_rq, but I could
> not figure out what the cancel_delayed_work here is for exactly. It
> seems if the request were to time out and the eh started while queue_rq
> was running we c
On 06/25/2014 11:52 AM, Christoph Hellwig wrote:
> +static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx, struct request *req)
> +{
> + struct request_queue *q = req->q;
> + struct scsi_device *sdev = q->queuedata;
> + struct Scsi_Host *shost = sdev->host;
> + struct scsi_cmnd *cmd =
On 06/25/2014 06:52 PM, Christoph Hellwig wrote:
This patch adds support for an alternate I/O path in the scsi midlayer
which uses the blk-mq infrastructure instead of the legacy request code.
Use of blk-mq is fully transparent to drivers, although for now a host
template field is provided to op
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