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From: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Ralph Campbell <ralph.campbell-h88ZbnxC6KDQT0dZR+AlfA@public.gmane.org>
Cc: Roland Dreier <rolandd-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>,
	Sean Hefty <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Hal Rosenstock
	<hal.rosenstock-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	"linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	lkml <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH v2.6.36-rc7] infiniband: update workqueue usage
Date: Wed, 20 Oct 2010 10:37:03 +0200	[thread overview]
Message-ID: <4CBEAA2F.6000009@kernel.org> (raw)
In-Reply-To: <1287508926.27343.299.camel-/vjeY7uYZjrPXfVEPVhPGq6RkeBMCJyt@public.gmane.org>

Hello,

On 10/19/2010 07:22 PM, Ralph Campbell wrote:
> On Tue, 2010-10-19 at 08:24 -0700, Tejun Heo wrote:
> 
>> * qib_cq_wq is a separate singlethread workqueue.  Does the queue
>>   require strict single thread execution ordering?  IOW, does each
>>   work have to be executed in the exact queued order and no two works
>>   should execute in parallel?  Or was the singlethreadedness chosen
>>   just to reduce the number of workers?
> 
> The work functions need to be called in-order and single threaded
> or memory will be freed multiple times and other "bad things".

I see, so they'll need to be converted to alloc_ordered_workqueue()
once -rc1 merge window opens up.  I'll follow up with the conversion.

Thanks.

-- 
tejun
--
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  parent reply	other threads:[~2010-10-20  8:37 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-10-19 15:24 [PATCH v2.6.36-rc7] infiniband: update workqueue usage Tejun Heo
     [not found] ` <4CBDB834.2050905-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2010-10-19 17:22   ` Ralph Campbell
     [not found]     ` <1287508926.27343.299.camel-/vjeY7uYZjrPXfVEPVhPGq6RkeBMCJyt@public.gmane.org>
2010-10-20  8:37       ` Tejun Heo [this message]
2010-10-19 18:40   ` Bart Van Assche
2010-10-20  8:38     ` Tejun Heo
     [not found]       ` <4CBEAA6E.2060000-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2010-10-20 10:21         ` Bart Van Assche
2010-10-20 11:03           ` Tejun Heo

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