linux-kernel - Re: [BUG 2.6.20-rc2-mm1] init segfaults when CONFIG_PROFILE

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Date:	Mon, 1 Jan 2007 10:40:29 +0800
From:	Fengguang Wu <fengguang.wu@...il.com>
To:	Daniel Walker <dwalker@...sta.com>
Cc:	Hua Zhong <hzhong@...il.com>, Andrew Morton <akpm@...l.org>,
	LKML <linux-kernel@...r.kernel.org>, mingo@...e.hu,
	johnstul@...ibm.com
Subject: Re: [BUG 2.6.20-rc2-mm1] init segfaults when CONFIG_PROFILE_LIKELY=y

On Sun, Dec 31, 2006 at 11:45:09AM -0800, Daniel Walker wrote:
> On Sun, 2006-12-31 at 23:04 +0800, Fengguang Wu wrote:
> > Hi,
> > 
> > The following messages keeps popping up when CONFIG_PROFILE_LIKELY=y:
> > 
> > init[1]: segfault at ffffffff8118c110 rip ffffffff8118c110 rsp 00007fff9a9d14d8 error 15
> > init[1]: segfault at ffffffff8118c110 rip ffffffff8118c110 rsp 00007fff9a9d14d8 error 15
> > init[1]: segfault at ffffffff8118c110 rip ffffffff8118c110 rsp 00007fff9a9d14d8 error 15
> > init[1]: segfault at ffffffff8118c110 rip ffffffff8118c110 rsp 00007fff9a9d14d8 error 15
> > init[1]: segfault at ffffffff8118c110 rip ffffffff8118c110 rsp 00007fff9a9d14d8 error 15
> > init[1]: segfault at ffffffff8118c110 rip ffffffff8118c110 rsp 00007fff9a9d14d8 error 15
> > init[1]: segfault at ffffffff8118c110 rip ffffffff8118c110 rsp 00007fff9a9d14d8 error 15
> > init[1]: segfault at ffffffff8118c110 rip ffffffff8118c110 rsp 00007fff9a9d14d8 error 15
> > 
> 
> 
> Does this seem like an appropriate solution? This just reconstitutes
> Ingo's patch by removing the unlikely calls that got added recently. 
> 
> Maybe a comment into vsyscall.c that says to stay away from all macro's
> and possible debug code that could be added might be helpful ?
> 
> Signed-Off-By: Daniel Walker <dwalker@...sta.com>

Thanks, it worked!

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