Messages in this thread | | | Date | Sun, 4 Oct 2009 18:47:31 +0200 | From | Ingo Molnar <> | Subject | Re: [this_cpu_xx V4 02/20] this_cpu: X86 optimized this_cpu operations |
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* Pekka Enberg <penberg@cs.helsinki.fi> wrote:
> Hi, > > Ingo Molnar wrote: >> * cl@linux-foundation.org <cl@linux-foundation.org> wrote: >> >>> Basically the existing percpu ops can be used for this_cpu variants >>> that allow operations also on dynamically allocated percpu data. >>> However, we do not pass a reference to a percpu variable in. Instead >>> a dynamically or statically allocated percpu variable is provided. >>> >>> Preempt, the non preempt and the irqsafe operations generate the same >>> code. It will always be possible to have the requires per cpu >>> atomicness in a single RMW instruction with segment override on x86. >>> >>> 64 bit this_cpu operations are not supported on 32 bit. >>> >>> Signed-off-by: Christoph Lameter <cl@linux-foundation.org> >> >> Acked-by: Ingo Molnar <mingo@elte.hu> > > I haven't looked at the series in detail but AFAICT the SLUB patches > depend on the x86 ones. Any suggestions how to get all this into > linux-next? Should I make a topic branch in slab.git on top of -tip or > something?
I'd suggest to keep these patches together in the right topical tree: Tejun's percpu tree. Any problem with that approach?
Ingo
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