Messages in this thread | | | Date | Sat, 28 Sep 2013 09:54:09 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH] checkpatch: Make the memory barrier test noisier |
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On Sat, Sep 28, 2013 at 01:40:27AM +0200, Oliver Neukum wrote: > On Fri, 2013-09-27 at 16:50 +0200, Peter Zijlstra wrote: > > On Fri, Sep 27, 2013 at 07:34:55AM -0700, Joe Perches wrote: > > > That would make it seem as if all barriers are SMP no? > > > > I would think any memory barrier is ordering against someone else; if > > not smp then a device/hardware -- like for instance the hardware page > > table walker. > > > > Barriers are fundamentally about order; and order only makes sense if > > there's more than 1 party to the game. > > But not necessarily more than 1 kind of parties. It is perfectly > possible to have a barrier against other threads running the same > function.
Then that makes a good comment ;-)
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