Re: [PATCH 8/9] rsxx: Fixes CPU usage issues on RHEL 6 Kernels.

[Philip J. Kelleher]

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@xxxxxxxxxxxxxxxxxx>
> > 
> > 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
> 

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