linux-kernel - Re: [RFC 00/15] x86_64: Optimize percpu accesses

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Message-ID: <4874F7F2.6050108@sgi.com>
Date:	Wed, 09 Jul 2008 10:40:02 -0700
From:	Mike Travis <travis@....com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Jeremy Fitzhardinge <jeremy@...p.org>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Jack Steiner <steiner@....com>, linux-kernel@...r.kernel.org
Subject: Re: [RFC 00/15] x86_64: Optimize percpu accesses

H. Peter Anvin wrote:
> Hi Mike,
> 
> Did the suspected linker bug issue ever get resolved?
> 
>     -hpa

Hi Peter,

I was not able to figure out how the two versions of the same
kernel compiled by gcc-4.2.0 and gcc-4.2.4 differed.   Currently,
I'm sticking with gcc-4.2.4 as it boots much farther.

There still is a problem where if I bump THREAD_ORDER, the
problem goes away and everything so far that I've tested boots
up fine.

We tried to install a later gcc (4.3.1) that might have the
"GCC_HAS_SP" flag but our sys admin reported:

	The 4.3.1 version gives me errors on the make.  I had to
	pre-install gmp and mpfr, but, I still get errors on the make.

I think that was the latest he found on the GNU/GCC site.

Thanks,
Mike
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