Messages in this thread | | | Date | Wed, 22 Sep 2010 11:41:44 -0700 | From | "Paul E. McKenney" <> | Subject | Re: memory barrier question |
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On Tue, Sep 21, 2010 at 07:59:10AM -0700, Paul E. McKenney wrote: > On Mon, Sep 20, 2010 at 01:40:55PM -0700, Paul E. McKenney wrote: > > On Tue, Sep 21, 2010 at 08:26:14AM +1200, Michael Cree wrote: > > > On 21/09/10 06:25, Paul E. McKenney wrote: > > > >But do we really care about Alpha anymore? (I can see it now... The > > > >Alpha portion of the kernel tree moves to staging...) > > > > > > I do. > > > > > > Sent from my Compaq Alpha XP1000 :-) > > > > In that case, an smp_read_barrier_depends() or rcu_dereference() is > > also required... > > Wait a minute... I finally got a chance to look up the system. This > system has only a single Alpha CPU, right? > > If so, just build a UP kernel and be happy. No need to worry about > any of these SMP issues. > > So, an alternative proposal -- support only UP kernels on Alpha. ;-)
And there do seem to be some SMP Alpha systems still in use:
http://www.alphalinux.org/wiki/index.php/User:Armin76/HW_list
Thanx, Paul
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