linux-kernel - Re: [PATCH 10/14] scsi: only maintain target_blocked if the driver has a target queue limit

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Message-ID: <yq1oawdgsq4.fsf@sermon.lab.mkp.net>
Date:	Fri, 25 Jul 2014 15:10:11 -0400
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Christoph Hellwig <hch@....de>
Cc:	James Bottomley <James.Bottomley@...senPartnership.com>,
	linux-scsi@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
	Bart Van Assche <bvanassche@...ionio.com>,
	Mike Christie <michaelc@...wisc.edu>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Robert Elliott <Elliott@...com>, Webb Scales <webbnh@...com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 10/14] scsi: only maintain target_blocked if the driver has a target queue limit

>>>>> "Christoph" == Christoph Hellwig <hch@....de> writes:

Christoph> This saves us an atomic operation for each I/O submission and
Christoph> completion for the usual case where the driver doesn't set a
Christoph> per-target can_queue value.  Only a few iscsi hardware
Christoph> offload drivers set the per-target can_queue value at the
Christoph> moment.

Reviewed-by: Martin K. Petersen <martin.petersen@...cle.com>

-- 
Martin K. Petersen	Oracle Linux Engineering
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