linux-kernel - Re: 2.6.25-rc2-mm1

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Message-ID: <20080228193233.GA26735@elte.hu>
Date:	Thu, 28 Feb 2008 20:32:33 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	kosaki.motohiro@...fujitsu.com, srostedt@...hat.com,
	Lee.Schermerhorn@...com, linux-ia64@...r.kernel.org,
	linux-kernel@...r.kernel.org, tony.luck@...el.com,
	mingo@...hat.com, bob.picco@...com, eric.whitney@...com
Subject: Re: 2.6.25-rc2-mm1 - boot hangs on ia64


* Andrew Morton <akpm@...ux-foundation.org> wrote:

> > > I don't think we shoudl have added that hack in the first place.  
> > > It solves a problem which about three developers hit four times in 
> > > five years but it has made kernel logging less reliable for 
> > > everyone.
> > 
> > well, the problem was ia64, not a problem on x86 or other platforms.
> 
> I am referring to the original change which made klogd wakeups 
> unreliable.

oh, indeed - agreed - i missed the fact that is_locked check is sporadic 
and can cause other CPUs to prevent the wakeup of klogd. I've zapped the 
change.

	Ingo
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