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Message-ID: <20130501143449.GB17546@oc6784271780.ibm.com> Date: Wed, 1 May 2013 09:34:49 -0500 From: "Philip J. Kelleher" <pjk1939@...ux.vnet.ibm.com> To: Jens Axboe <axboe@...nel.dk> Cc: linux-kernel@...r.kernel.org, klebers@...ux.vnet.ibm.com, brking@...ux.vnet.ibm.com Subject: Re: [PATCH 8/9] rsxx: Fixes CPU usage issues on RHEL 6 Kernels. Again, thanks for the prompt reply. Also, sorry for my poor explaination skills :) The RHEL 6.x version of the driver is using the legacy worqueue create function, 'create_singlethread_workqueue'. This would cause heavy usage of one CPU if data was being thrashed pretty hard. So, in order to fix it, workqueues are now being created with 'create_workqueue' and synchronization with mutexes. Thanks, -Philip Kelleher On Wed, May 01, 2013 at 01:44:20PM +0200, Jens Axboe wrote: > On Tue, Apr 30 2013, Philip J. Kelleher wrote: > > From: Philip J Kelleher <pjk1939@...ux.vnet.ibm.com> > > > > This changes how the driver schedules the work to the > > workqueue threads. > > > > Note: This patch is primarily for the Red Hat 6 Kernels. > > You need to properly explain the problem and how it's fixed in the > changelog. The above really makes the read none the wiser on what the > issue is. > > -- > Jens Axboe > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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