linux-kernel - Re: [PATCH 7/9] PM: Add suspend blocking work.

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Message-ID: <4BD1576E.5070401@kernel.org>
Date:	Fri, 23 Apr 2010 10:16:46 +0200
From:	Tejun Heo <tj@...nel.org>
To:	Arve Hjønnevåg <arve@...roid.com>
CC:	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dmitri Vorobiev <dmitri.vorobiev@...ial.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Thomas Gleixner <tglx@...utronix.de>,
	Oleg Nesterov <oleg@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 7/9] PM: Add suspend blocking work.

Hello,

On 04/23/2010 03:08 AM, Arve Hjønnevåg wrote:
> Allow work to be queued that will block suspend while it is pending
> or executing. To get the same functionality in the calling code often
> requires a separate suspend_blocker for pending and executing work, or
> additional state and locking.

Hmm... I think this can be implemented as pure wrapper around
workqueue instead of injecting a flag and code into workqueue core.
Adding @fn field to suspend_blocking_work struct and using a custom
work function to call it and then invoke suspend_unblock() should be
enough, right?  Oh, dedicated queue functions will be needed too.  I
don't think it's wise to meddle with workqueue core code for this.

Thanks.

-- 
tejun
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