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Date: Sat, 1 Aug 2009 15:04:55 -0700 (PDT) From: Linus Torvalds <torvalds@...ux-foundation.org> To: "H. Peter Anvin" <hpa@...or.com> cc: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Tejun Heo <tj@...nel.org> Subject: Re: [GIT PULL] Additional x86 fixes for 2.6.31-rc5 On Sat, 1 Aug 2009, H. Peter Anvin wrote: > > This is clearly better... now the semi-obvious question becomes if there > is any way we can get compiler support to do better and migrate to that > as the compiler allows. Well, even if we had compiler support, we'd have to basically then wait forever to make sure everybody has a supported compiler. So I think we're better off not worrying too much about that - it's not going to happen any time in the near future. I've now tested my patch, and it seems to result in a working kernel too. > In particular, if I remember right the problem with using __thread for > percpu was exactly that the current cpuness can change almost anywhere, > unless preemption is disabled. That shouldn't matter. If it uses '%gs', it should all just work automatically. But if gcc does something different for thread-local, it's basically useless. Linus -- 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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