[Xen-devel] Re: [PATCH] clean up CFLAGS

["Charles Coffing" <ccoffing@xxxxxxxxxx>]

-O2 actually tends to be my preference too for the same reason, but I
was just rearranging the existing options.

I've certainly seen cases (prior to Xen, though) where -O3 was slower
than -O2, probably due to cache effects.


>>> On Fri, Mar 10, 2006 at  7:50 AM, in message
<p73slpquzfr.fsf@xxxxxxxxxxxxx>,
Andi Kleen <ak@xxxxxxx> wrote: 
> "Charles Coffing" <ccoffing@xxxxxxxxxx> writes:
> 
>> This patch cleans up the usage of CFLAGS.  This is nice for
packagers,
>> who would like to control the base compilation flags from a central
>> place.
>> 
>> I've put some default CFLAGS (- Wall - O3) 
> 
> Are you sure - O3 is a good idea? In my experience it just bloats 
> .text for most projects because of its aggressive inlining. I would
> use - O2.
> 
> - Andi



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