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From: Tejun Heo <tj@kernel.org>
To: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Cc: rjw@sisk.pl, pavel@ucw.cz, len.brown@intel.com, oleg@redhat.com,
	linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org
Subject: Re: [PATCH 1/2] PM / Freezer: Remove the "userspace only" constraint from freezer[_do_not]_count()
Date: Tue, 6 Dec 2011 08:35:10 -0800	[thread overview]
Message-ID: <20111206163510.GA11747@google.com> (raw)
In-Reply-To: <20111206160251.16729.62719.stgit@srivatsabhat.in.ibm.com>

On Tue, Dec 06, 2011 at 09:33:44PM +0530, Srivatsa S. Bhat wrote:
> At present, the functions freezer_count() and freezer_do_not_count()
> impose the restriction that they are effective only for userspace processes.
> However, now, these functions have found more utility than originally
> intended by the commit which introduced it: ba96a0c8 (freezer:
> fix vfork problem). And moreover, even the vfork issue does not need
> the above restriction in these functions, since they are anyway called by
> userspace processes.
> 
> So, modify these functions to make them work even for kernel threads, so
> that they can be used at other places in the kernel, where the userspace
> restriction doesn't apply.
> 
> Suggested-by: Oleg Nesterov <oleg@redhat.com>
> Suggested-by: Tejun Heo <tj@kernel.org>
> Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>

Acked-by: Tejun Heo <tj@kernel.org>

Thanks.

-- 
tejun

  parent reply	other threads:[~2011-12-06 16:35 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-06 16:03 [PATCH 1/2] PM / Freezer: Remove the "userspace only" constraint from freezer[_do_not]_count() Srivatsa S. Bhat
2011-12-06 16:04 ` [PATCH 2/2] PM: Use the freezer_count() functions in [un]lock_system_sleep() APIs Srivatsa S. Bhat
2011-12-06 16:35   ` Tejun Heo
2011-12-06 16:35 ` Tejun Heo [this message]
2011-12-06 17:20 ` [PATCH 1/2] PM / Freezer: Remove the "userspace only" constraint from freezer[_do_not]_count() Oleg Nesterov
2011-12-06 18:11   ` Srivatsa S. Bhat
2011-12-06 22:36     ` Rafael J. Wysocki

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