linux-kernel - Re: [RFC PATCH 1/3] timer: fix comments of try_to_del_timer

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Message-ID: <20100824124958.GA3070@zhy>
Date:	Tue, 24 Aug 2010 20:49:58 +0800
From:	Yong Zhang <yong.zhang0@...il.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	linux-kernel@...r.kernel.org, tglx@...utronix.de,
	akpm@...ux-foundation.org, mingo@...e.hu, peterz@...radead.org
Subject: Re: [RFC PATCH 1/3] timer: fix comments of try_to_del_timer_sync()

On Tue, Aug 24, 2010 at 02:11:09PM +0200, Oleg Nesterov wrote:
> On 08/24, Yong Zhang wrote:
> >
> > From: Yong Zhang <yong.zhang@...driver.com>
> >
> > In commit fd450b7318b75343fd76b3d95416853e34e72c95, it was saying
> > try_to_del_timer_sync() can be used in interrupt context.
> 
> Yes, but not in UP case.

Yeah, but in UP case there is no try_to_del_timer_sync(), it's redefined
to del_timer().

> 
> Please remove "#ifdef CONFIG_SMP" from set_running_timer(), then iirc
> it can be used from irq.

I have noticed your comments in the commit log, but I think it's about
introducing the same semantic of try_to_del_timer_sync() on UP as well
as SMP. But this patch is focusing on the current code(SMP special).
Not about realizing try_to_del_timer_sync() on UP case. Do we need
to do that?

Thanks,
Yong
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