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xen-devel
[Xen-devel] Re: [PATCH RFC V4 09/10] x86/jump_label: use GENERIC_NOP5_AT
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To: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
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Subject: |
[Xen-devel] Re: [PATCH RFC V4 09/10] x86/jump_label: use GENERIC_NOP5_ATOMIC instead of jmp5 +0 |
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From: |
"H. Peter Anvin" <hpa@xxxxxxxxx> |
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Date: |
Thu, 13 Oct 2011 08:40:42 -0700 |
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Cc: |
the arch/x86 maintainers <x86@xxxxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, Jan Glauber <jang@xxxxxxxxxxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Jason Baron <jbaron@xxxxxxxxxx>, David Daney <david.daney@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, Michael Ellerman <michael@xxxxxxxxxxxxxx>, Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx> |
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Thu, 13 Oct 2011 08:43:17 -0700 |
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On 10/12/2011 05:08 PM, Jeremy Fitzhardinge wrote:
> From: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
>
> GENERIC_NOP5_ATOMIC should make a better nop.
>
On 32 bits, yes. On 64 bits you should use P6_NOP5_ATOMIC.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
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