Re: [rfc][patch 3/3] x86: optimise barriers

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From: Jarek Poplawski <jarkao2@...>

To: Nick Piggin <npiggin@...>

Cc: Linux Kernel Mailing List <linux-kernel@...>, Linus Torvalds <torvalds@...>, Andi Kleen <ak@...>

Subject: Re: [rfc][patch 3/3] x86: optimise barriers

Date: Friday, October 12, 2007 - 8:10 am

On Fri, Oct 12, 2007 at 01:55:10PM +0200, Jarek Poplawski wrote:
quoted text> On Fri, Oct 12, 2007 at 12:42:38PM +0200, Nick Piggin wrote:
...
quoted text> > [...] If you can actually come up with a test
> > case that triggers load/load or store/store reordering, I'm sure
> > Intel / AMD would like to see it ;)
> 
> It seems, after testing only (plus no official spec against this idea),

(...plus of course proper smp_rmb & smp_wmb vs. smp_mb interpretation
probably available from Paul McKenney or Davide Libenzi before this
Intel spec, as well...)

Jarek P.
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Messages in current thread:

[rfc][patch 1/3] x86_64: fence nontemproal stores, Nick Piggin, (Thu Oct 4, 1:21 am)

[rfc][patch 3/3] x86: optimise barriers, Nick Piggin, (Thu Oct 4, 1:23 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Jarek Poplawski, (Fri Oct 12, 4:25 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Linus Torvalds, (Fri Oct 12, 11:13 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Jarek Poplawski, (Mon Oct 15, 3:44 am)

RE: [rfc][patch 3/3] x86: optimise barriers, David Schwartz, (Mon Oct 15, 10:38 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Nick Piggin, (Mon Oct 15, 4:09 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Jarek Poplawski, (Mon Oct 15, 5:10 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Nick Piggin, (Mon Oct 15, 8:50 pm)

Re: [rfc][patch 3/3] x86: optimise barriers, Jarek Poplawski, (Tue Oct 16, 5:00 am)

Re: [rfc][patch 3/3] x86: optimise barriers, , (Tue Oct 16, 5:14 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Jarek Poplawski, (Tue Oct 16, 8:49 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Jarek Poplawski, (Mon Oct 15, 5:24 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Nick Piggin, (Fri Oct 12, 4:57 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Jarek Poplawski, (Fri Oct 12, 5:55 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Nick Piggin, (Fri Oct 12, 6:42 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Jarek Poplawski, (Fri Oct 12, 7:55 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Jarek Poplawski, (Fri Oct 12, 8:10 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Helge Hafting, (Fri Oct 12, 4:42 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Jarek Poplawski, (Fri Oct 12, 5:12 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Helge Hafting, (Fri Oct 12, 8:44 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Jarek Poplawski, (Fri Oct 12, 9:29 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Helge Hafting, (Mon Oct 15, 6:17 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Jarek Poplawski, (Mon Oct 15, 7:53 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Nick Piggin, (Fri Oct 12, 5:44 am)

Re: [rfc][patch 3/3] x86: optimise barriers, Jarek Poplawski, (Fri Oct 12, 6:04 am)

[rfc][patch 2/3] x86: fix IO write barriers, Nick Piggin, (Thu Oct 4, 1:22 am)

Re: [rfc][patch 2/3] x86: fix IO write barriers, Dave Jones, (Thu Oct 4, 1:32 pm)

Re: [rfc][patch 2/3] x86: fix IO write barriers, Andi Kleen, (Thu Oct 4, 1:53 pm)

Re: [rfc][patch 2/3] x86: fix IO write barriers, Dave Jones, (Thu Oct 4, 2:10 pm)

Re: [rfc][patch 2/3] x86: fix IO write barriers, Andi Kleen, (Thu Oct 4, 2:21 pm)

Re: [rfc][patch 2/3] x86: fix IO write barriers, Dave Jones, (Thu Oct 4, 2:41 pm)

Re: [rfc][patch 2/3] x86: fix IO write barriers, Andi Kleen, (Thu Oct 4, 2:58 pm)

Re: [rfc][patch 2/3] x86: fix IO write barriers, Dave Jones, (Thu Oct 4, 3:08 pm)

Re: [rfc][patch 2/3] x86: fix IO write barriers, Alan Cox, (Thu Oct 4, 4:52 pm)

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