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

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Message-ID: <20130501193501.GL7800@kernel.dk>
Date:	Wed, 1 May 2013 21:35:01 +0200
From:	Jens Axboe <axboe@...nel.dk>
To:	"Philip J. Kelleher" <pjk1939@...ux.vnet.ibm.com>
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.

On Wed, May 01 2013, Philip J. Kelleher wrote:
> 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.

See, that is what should have been in the changelog!

-- 
Jens Axboe

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