From: Oleg Nesterov <oleg@redhat.com>
To: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Cc: len.brown@intel.com, linux-doc@vger.kernel.org,
linux-pm@vger.kernel.org, kexec@lists.infradead.org,
linux-kernel@vger.kernel.org, rjw@sisk.pl, rdunlap@xenotime.net,
ebiederm@xmission.com, pavel@ucw.cz, Tejun Heo <tj@kernel.org>
Subject: Re: [PATCH 1/3] PM / Sleep: Make [un]lock_system_sleep() generic
Date: Mon, 5 Dec 2011 19:35:02 +0100 [thread overview]
Message-ID: <20111205183502.GA30482@redhat.com> (raw)
In-Reply-To: <4EDD0D35.1020907@linux.vnet.ibm.com>
On 12/05, Srivatsa S. Bhat wrote:
>
> I looked up in git and found that commit ba96a0c by Rafael introduced the
> count functions, to handle the vfork case. But now, we seem to have more
> uses than that. So I think we can remove that userspace restriction in the
> count functions,
Agreed.
> and in kernel/fork.c, do something like:
>
> if (current->mm)
> freezer_do_not_count();
> ...
> if (current->mm)
> freezer_count();
see http://marc.info/?l=linux-kernel&m=132033335507261
I think this is not needed, we can just remove the ->mm check.
CLONE_VFORK is not used by a freezable kthread.
Oleg.
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next prev parent reply other threads:[~2011-12-05 19:03 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-04 20:02 [PATCH 1/3] PM / Sleep: Make [un]lock_system_sleep() generic Srivatsa S. Bhat
2011-12-04 20:03 ` [PATCH 2/3] PM / Sleep: Replace mutex_[un]lock(&pm_mutex) with [un]lock_system_sleep() Srivatsa S. Bhat
2011-12-04 20:03 ` [PATCH 3/3] PM / Docs: Recommend the use of [un]lock_system_sleep() over mutex_[un]lock(&pm_mutex) Srivatsa S. Bhat
2011-12-05 17:15 ` Tejun Heo
2011-12-05 17:38 ` Srivatsa S. Bhat
2011-12-05 17:43 ` Tejun Heo
2011-12-05 17:56 ` Srivatsa S. Bhat
2011-12-05 17:59 ` Tejun Heo
2011-12-05 17:14 ` [PATCH 1/3] PM / Sleep: Make [un]lock_system_sleep() generic Tejun Heo
2011-12-05 17:25 ` Srivatsa S. Bhat
2011-12-05 17:30 ` Tejun Heo
2011-12-05 17:41 ` Srivatsa S. Bhat
2011-12-05 18:28 ` Srivatsa S. Bhat
2011-12-05 18:35 ` Oleg Nesterov [this message]
2011-12-05 19:18 ` Srivatsa S. Bhat
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