linux-kernel - Re: Is it a workqueue related issue in 2.6.37 (Was: Re: [libvirt] blkio cgroup [solved])

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Message-ID: <20110225160903.GR24828@htj.dyndns.org>
Date:	Fri, 25 Feb 2011 17:09:03 +0100
From:	Tejun Heo <tj@...nel.org>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	Dominik Klein <dk@...telegence.net>,
	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	libvir-list@...hat.com
Subject: Re: Is it a workqueue related issue in 2.6.37 (Was: Re: [libvirt]
 blkio cgroup [solved])

Hello,

On Fri, Feb 25, 2011 at 11:03:53AM -0500, Vivek Goyal wrote:
> +int kthrotld_schedule_delayed_work(struct throtl_data *td,
> +			struct delayed_work *dwork, unsigned long delay)
> +{
> +	return queue_delayed_work(kthrotld_workqueue, dwork, delay);
> +}
> +

I don't think wrapping is necessary.  Defining and using a workqueue
directly should be enough.

> @@ -1113,6 +1120,11 @@ void blk_throtl_exit(struct request_queu
>  
>  static int __init throtl_init(void)
>  {
> +	kthrotld_workqueue = alloc_workqueue("kthrotld",
> +				WQ_MEM_RECLAIM | WQ_HIGHPRI, 0);

And I don't think kthrotld needs to be HIGHPRI.

Thanks.

-- 
tejun
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