linux-kernel - Re: [PATCH 1/3] PM / Sleep: Make [un]lock_system

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Message-ID: <20111205173057.GE627@google.com>
Date:	Mon, 5 Dec 2011 09:30:57 -0800
From:	Tejun Heo <tj@...nel.org>
To:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
Cc:	rjw@...k.pl, pavel@....cz, len.brown@...el.com,
	ebiederm@...ssion.com, rdunlap@...otime.net,
	linux-doc@...r.kernel.org, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	Oleg Nesterov <oleg@...hat.com>
Subject: Re: [PATCH 1/3] PM / Sleep: Make [un]lock_system_sleep() generic

(cc'ing Oleg)

On Mon, Dec 05, 2011 at 10:55:51PM +0530, Srivatsa S. Bhat wrote:
> I wanted these APIs to be generic, not restricted to work only for userspace
> processes. Both freezer_do_not_count() and freezer_count() are effective only
> when current->mm is non-NULL (ie., only for userspace ones).
> I think I have documented this in the patch which added these things to the
> 2 APIs. See commit 6a76b7a in linux-pm/linux-next.

I see.  Oleg was curious about the ->mm condition too and IIRC there's
no reason for that restriction.  Maybe removing that in another patch
and using the count functions is better?

Thanks.

-- 
tejun
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