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Date: Tue, 26 Oct 2010 09:34:59 -0700 From: "H. Peter Anvin" <hpa@...or.com> To: Andi Kleen <andi@...stfloor.org> CC: linux-kvm@...r.kernel.org, avi@...hat.com, linux-kernel@...r.kernel.org Subject: Re: fyi: gcc33-hammer crashes when compiling kvm emulate.c On 10/26/2010 05:38 AM, Andi Kleen wrote: > Hi, > > While doing a test run with the minimum supported compiler > I found: > > An old gcc 3.3-hammer segfaults when compiling the current KVM > emulate.c (or rather in x86_emulate_insns) on x86-64. > > The compiler goes into an endless recursion in validate_rtx and then > eventually overflows the stack and dies. > > I minimized a test case, but didn't find a workaround > (minimized test case http://halobates.de/emulate-min.i) > > My guess it's related to some of the inline assembler uses. > > This might be an excuse to bump the minimum compiler version again. > We have said 3.4 minimum for x86 for a long time now, and have an RFC out to bump to 4.1. Unfortunately there isn't a good repo of arch-specific version requirements in the kernel source code; in fact, I just talked to Tony Luck yesterday about the need for that. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- 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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