Message-ID: <488A0375.4050605@sgi.com>
Date: Fri, 25 Jul 2008 09:46:45 -0700
From: Mike Travis <travis@sgi.com>
User-Agent: Thunderbird 2.0.0.6 (X11/20070801)
MIME-Version: 1.0
To: Jeremy Fitzhardinge <jeremy@goop.org>
CC: "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@elte.hu>,
       Andrew Morton <akpm@linux-foundation.org>,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       Christoph Lameter <cl@linux-foundation.org>,
       Jack Steiner <steiner@sgi.com>, linux-kernel@vger.kernel.org,
       Hugh Dickins <hugh@veritas.com>
Subject: Re: [RFC 00/15] x86_64: Optimize percpu accesses
References: <20080709165129.292635000@polaris-admin.engr.sgi.com> <4874F30C.8020800@zytor.com> <4874F909.7060503@goop.org> <4889F5FA.1050908@sgi.com> <4889FA96.1000701@goop.org>
In-Reply-To: <4889FA96.1000701@goop.org>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1259
Lines: 33

Jeremy Fitzhardinge wrote:
> Mike Travis wrote:
>> FYI, I think it was a combination of errors that was causing my problems.
>> In any case, I've successfully compiled and booted Ingo's pesky config
>> config-Tue_Jul__1_16_48_45_CEST_2008.bad with gcc's 4.2.0, 4.2.3 and
>> 4.2.4
>> on both Intel and AMD boxes.  (As well as a variety of other configs.)
>>   
> 
> Good.  What compilers have you tested?  Will it work over the complete
> supported range?

The oldest gcc I have available is 3.4.3 (and I just tried that one and
it worked.)  So that one and the ones listed above I've verified using
Ingo's test config.  (All other testing I'm using 4.2.3.)

> 
>> I think Hugh's change adding "text" to the BUILD_IRQ macro might also
>> have
>> helped, since interrupts seemed to have always been involved in the
>> panics.
>> That might explain the variable-ness of the gcc version's.
> 
> Yes, indeed.  That was a nasty one, and will be very sensitive to the
> exact order gcc decided to emit things.
> 
>    J

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/