Re: [PATCH 03/13] jump label v9: x86 support

From: H. Peter Anvin
Date: Fri Jun 11 2010 - 02:19:38 EST

On 06/10/2010 05:14 AM, Ingo Molnar wrote:
> * Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
>> On Wed, 2010-06-09 at 17:39 -0400, Jason Baron wrote:
>> That deserves a comment somewhere, it basically makes OPTIMIZE_FOR_SIZE
>> useless...
> Hm, we need more than a comment for that - distros enable CC_OPTIMIZE_FOR_SIZE
> all the time, for the massive kernel image (and hotpath cache footprint)
> savings. Is this fixable?

Actually the current reports from the gcc community is that gcc 4.5.0 +
-Os produces a broken kernel even without asm goto:

H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.

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