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Message-ID: <4CC803DD.2010508@redhat.com> Date: Wed, 27 Oct 2010 12:50:05 +0200 From: Avi Kivity <avi@...hat.com> To: "H. Peter Anvin" <hpa@...or.com> CC: Andi Kleen <andi@...stfloor.org>, kvm@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: fyi: gcc33-hammer crashes when compiling kvm emulate.c On 10/26/2010 10:37 PM, H. Peter Anvin wrote: > On 10/26/2010 01:27 PM, Andi Kleen wrote: > >> That is an issue too, as 3.x does a lot fewer optimizations than 4.x. > > > > Well to be fair the default -Os build disables most of the fancy stuff > > (and the resulting code is often terrible) > > > > I guess it doesn't matter too much, at least not with the > > CONFIG_CC_OPTIMIZE_SIZE default. > > > > Yes, it would be nice to have a setting which is "optimize but don't > bloat excessively." > Would be good to have __fastpath and __slowpath function attributes. __fastpath would always be optimized for speed, __slowpath always for size, and everything else would use the default (determined by CONFIG_CC_OPTIMIZE_FOR_SIZE). Looks like gcc has support for this, with __attribute__((hot)), __attribute__((cold)), and __attribute__((optimize)). -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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