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From: Peter Osterlund <petero2@telia.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Software suspend testing in 2.6.0-test1
Date: 22 Jul 2003 01:46:01 +0200	[thread overview]
Message-ID: <m2vftv4f5y.fsf@telia.com> (raw)
In-Reply-To: <20030721212828.GE436@elf.ucw.cz>

Hi!

Pavel Machek <pavel@ucw.cz> writes:

> > > But why do you touch PF_FROZEN here? Refrigerator should do that.
> > > And wake_up_process should not be needed...
> > > If it is in refrigerator, it polls PF_FREEZE...
> > 
> > Note that the old code always called wake_up_process(), which is
> > necessary to make the process run one more iteration in refrigerator()
> > and relize that it is time to unfreeze.
> > 
> > The patch changes things so that wake_up_process() is NOT called if
> > the process is stopped at some other place than in refrigerator().
> > This ensures that processes that were stopped before we invoked swsusp
> > are still stopped after resume.
> 
> Yes, but you still print warning for them. I hopefully killed that.
...
> +static inline int interesting_process(struct task_struct *p)
> +{
> +	if (p->flags & PF_IOTHREAD)
> +		return 0;
> +	if (p == current)
> +		return 0;
> +	if ((p->state == TASK_ZOMBIE) || (p->state == TASK_DEAD))
> +		return 0;
> +	if (p->state == TASK_STOPPED)
> +		return 0;
> +
> +
> +	return 1;
> +}

But this doesn't work. We can't skip stopped tasks in the
thaw_processes() function, because frozen tasks are also stopped
tasks. Therefore nothing will be woken up during resume.

It's probably best to just delete the printk("strange,...") line.

-- 
Peter Osterlund - petero2@telia.com
http://w1.894.telia.com/~u89404340

  reply	other threads:[~2003-07-21 23:36 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-17 19:46 Software suspend testing in 2.6.0-test1 Peter Osterlund
2003-07-17 20:00 ` Pavel Machek
2003-07-17 20:09   ` Andrew Morton
2003-07-18  9:59     ` Peter Osterlund
2003-07-18 10:24       ` Andrew Morton
2003-07-18 15:22         ` Pavel Machek
2003-07-18 15:55           ` Peter Osterlund
2003-07-18 16:45             ` Andrew Morton
2003-07-18 17:50               ` Pavel Machek
2003-07-18 18:02                 ` Patrick Mochel
2003-07-18 18:04                   ` Pavel Machek
2003-07-18 21:05                     ` Nigel Cunningham
2003-07-18 19:37                 ` Andrew Morton
2003-07-18 19:58               ` Peter Osterlund
2003-07-18 20:15                 ` Andrew Morton
2003-07-18 22:13                   ` Pavel Machek
2003-07-20  0:22                   ` Peter Osterlund
2003-07-20  1:01                     ` Andrew Morton
2003-07-20  7:45                       ` Peter Osterlund
2003-07-18 21:05               ` Nigel Cunningham
2003-07-21 10:00   ` Peter Osterlund
2003-07-21 12:58     ` Pavel Machek
2003-07-21 14:36       ` Peter Osterlund
2003-07-21 21:28         ` Pavel Machek
2003-07-21 23:46           ` Peter Osterlund [this message]
2003-07-22 11:04             ` Pavel Machek

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