Messages in this thread | | | Date | Thu, 14 May 2009 16:33:12 +0200 | From | Andi Kleen <> | Subject | Re: [PATCH] x86: Extend test_and_set_bit() test_and_clean_bit() to 64 bits in X86_64 |
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On Thu, May 14, 2009 at 07:25:22AM -0700, H. Peter Anvin wrote: > Andi Kleen wrote: > > > > Pretty much all the bit ops and a few other operations currently have > > 2/4GB limits on x86-64. I don't think that's going to change. > > > > In the kernel nothing is ever that big continuously anyways. > > > > Uhm, that *is* the problem at hand... specifically the bootmem map on > multi-terabyte systems.
Well they have to fix a lot of more stuff then, when I did all the inline assembler >2GB objects were a explicit non goal. It also wouldn't surprise me if that wasn't true on other architectures too.
It would be better to just use open coded C for that case and avoid inline assembler.
-Andi -- ak@linux.intel.com -- Speaking for myself only.
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