On 09/04/2009 09:01 AM, Jeremy Fitzhardinge wrote: >>> >> It's correct that it doesn't make any difference for access, only for load. >> > > Well, to be completely precise, restore. When returning to usermode, > the "pop %seg" is slightly faster if you're restoring a null selector, > which is typically the case for %fs as 32-bit usermode doesn't use it. > That's a segment load... -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-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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