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From: Jeff Moyer <jmoyer@redhat.com>
To: Jens Axboe <jens.axboe@oracle.com>
Cc: Jan Kara <jack@suse.cz>, LKML <linux-kernel@vger.kernel.org>,
	Chris Mason <chris.mason@oracle.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Mike Galbraith <efault@gmx.de>,
	mszeredi@suse.de
Subject: Re: Performance regression in IO scheduler still there
Date: Thu, 12 Nov 2009 16:05:17 -0500	[thread overview]
Message-ID: <x49hbszpi7m.fsf@segfault.boston.devel.redhat.com> (raw)
In-Reply-To: <20091112210000.GO8742@kernel.dk> (Jens Axboe's message of "Thu, 12 Nov 2009 22:00:01 +0100")

Jens Axboe <jens.axboe@oracle.com> writes:

> On Thu, Nov 12 2009, Jeff Moyer wrote:
>> Good question.  ;-)  I grep for NCQ in dmesg output and make sure it's
>> greater than 0/32.  There may be a better way, though.
>
> cat /sys/block/<dev>/device/queue_depth
>
> :-)

OK, your comment about only working for SCSI disks threw me off.
Perhaps you meant only works for devices that use the sd driver?

Cheers,
Jeff

  reply	other threads:[~2009-11-12 21:06 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-10-26 17:20 Jan Kara
2009-10-26 17:26 ` Jeff Moyer
2009-11-05 20:10 ` Jeff Moyer
2009-11-05 23:00   ` Corrado Zoccolo
2009-11-06 14:14     ` Jeff Moyer
2009-11-10 18:37       ` Jan Kara
2009-11-06 18:56   ` Jeff Moyer
2009-11-08 17:01     ` Corrado Zoccolo
2009-11-10 16:47       ` Jeff Moyer
2009-11-10 17:37         ` Corrado Zoccolo
2009-11-11 14:10   ` Jan Kara
2009-11-11 17:43     ` Jeff Moyer
2009-11-12 17:29       ` Jan Kara
2009-11-12 20:44         ` Jeff Moyer
2009-11-12 21:00           ` Jens Axboe
2009-11-12 21:05             ` Jeff Moyer [this message]
2009-11-13  7:45               ` Jens Axboe
2009-11-16 10:47           ` Jan Kara
2009-11-16 16:58             ` Jan Kara
2009-11-16 17:03               ` Jeff Moyer
2009-11-16 18:38                 ` Corrado Zoccolo
2009-11-16 22:17                 ` Jan Kara

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