Messages in this thread |  | | | Date | Thu, 7 Oct 2010 16:11:42 +0200 | | Subject | Re: [RFC 0/3] Basic support for LWP | | From | Stephane Eranian <> |
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On Thu, Oct 7, 2010 at 3:59 PM, H. Peter Anvin <hpa@zytor.com> wrote: > On 10/07/2010 03:46 AM, Stephane Eranian wrote: >> >> As for the patch itself, I am not an expert at xsave/xrstor, but it seems to >> me you could decouple LWP from FPU. I think Brian had the same comment. >> I suspect this can be done and it will certainly look cleaner. >> > > Well, once you're using XSAVE you're not decoupled from the FPU. Worse, > if you're using XSAVE and not honoring CR0.TS you have a major design flaw. > Is that to say, that if you use LWP you will have to save/restore FPU state even though you're not actually using it?
> Nothing that can't be dealt with, but still... > > -- > 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@vger.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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