From: Tejun Heo <tj@kernel.org>
To: Oleg Nesterov <oleg@redhat.com>
Cc: matthltc@us.ibm.com, rjw@sisk.pl, paul@paulmenage.org,
containers@lists.linux-foundation.org,
linux-pm@lists.linux-foundation.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 6/6] freezer: kill unused set_freezable_with_signal()
Date: Wed, 7 Sep 2011 00:53:32 +0900 [thread overview]
Message-ID: <20110906155332.GF18425@mtj.dyndns.org> (raw)
In-Reply-To: <20110906152539.GA16899@redhat.com>
Hello,
On Tue, Sep 06, 2011 at 05:25:39PM +0200, Oleg Nesterov wrote:
> On 09/06, Oleg Nesterov wrote:
> >
> > Yes, agreed. In this case I think it should be
> >
> > #define wait_event_freezable(wq, condition) \
> > ({ \
> > int __retval; \
> > for (;;) { \
> > __retval = wait_event_interruptible(wq, \
> > (condition) || freezing(current)); \
> > if (__retval || (condition)) \
> > break; \
> > try_to_freeze(); \
> > } \
> > __retval; \
> > })
> >
> > __retval/ERESTARTSYS is only needed for kthreads which play with allow_signal(),
> > probably nobody should do this.
>
> I meant, unless the caller plays with allow_signal(), it has all rights to do
>
> if (wait_event_freezable(...))
> BUG();
>
> This becomes correct with the code above.
Yeap, sure, w/ freezable_with_signal gone, the above should work fine.
Care to create a patch?
Thanks.
--
tejun
next prev parent reply other threads:[~2011-09-06 15:53 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-02 18:27 [PATCHSET pm-freezer] freezer: fixes & simplifications Tejun Heo
2011-09-02 18:27 ` [PATCH 1/6] cgroup_freezer: fix freezer->state setting bug in freezer_change_state() Tejun Heo
2011-09-04 18:02 ` Oleg Nesterov
2011-09-04 18:11 ` Tejun Heo
2011-09-04 18:20 ` Oleg Nesterov
2011-09-02 18:27 ` [PATCH 2/6] freezer: set PF_NOFREEZE on a dying task right before TASK_DEAD " Tejun Heo
2011-09-02 18:27 ` [PATCH 3/6] freezer: restructure __refrigerator() Tejun Heo
2011-09-02 18:27 ` [PATCH 4/6] freezer: use lock_task_sighand() in fake_signal_wake_up() Tejun Heo
2011-09-02 18:27 ` [PATCH 5/6] freezer: remove unused @sig_only from freeze_task() Tejun Heo
2011-09-02 18:27 ` [PATCH 6/6] freezer: kill unused set_freezable_with_signal() Tejun Heo
2011-09-04 18:46 ` Oleg Nesterov
2011-09-05 2:33 ` Tejun Heo
2011-09-05 2:35 ` Tejun Heo
2011-09-05 16:21 ` Oleg Nesterov
2011-09-05 16:20 ` Oleg Nesterov
2011-09-06 3:28 ` Tejun Heo
2011-09-06 15:18 ` Oleg Nesterov
2011-09-06 15:25 ` Oleg Nesterov
2011-09-06 15:53 ` Tejun Heo [this message]
2011-09-07 18:21 ` [PATCH 0/1] freezer: fix wait_event_freezable/__thaw_task races Oleg Nesterov
2011-09-07 18:22 ` [PATCH 1/1] " Oleg Nesterov
2011-09-08 1:05 ` Tejun Heo
2011-09-08 17:59 ` Oleg Nesterov
2011-09-11 1:54 ` Tejun Heo
2011-09-11 18:29 ` Oleg Nesterov
2011-09-11 18:41 ` Oleg Nesterov
2011-09-08 18:01 ` [PATCH 6/6] freezer: kill unused set_freezable_with_signal() Matt Helsley
2011-09-11 1:37 ` Tejun Heo
2011-09-04 18:48 ` [PATCHSET pm-freezer] freezer: fixes & simplifications Oleg Nesterov
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