Messages in this thread | ![/](/images/icornerl.gif) | | Date | Wed, 27 Aug 2003 20:34:28 +0200 | From | Herbert Pötzl <> | Subject | Re: UP optimizations .. |
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On Wed, Aug 27, 2003 at 08:17:38PM +0200, Mikael Pettersson wrote: > Herbert =?iso-8859-1?Q?P=F6tzl?= writes: > > > > Hi Mikael! > > Hi Marcelo! > > > > stumbled repeatedly over the patches (or what remained of them) > > from Mikael?, replacing task->processor and friends by inline > > functions task_cpu(task), to eliminate them on UP systems ... > > > > my questions: > > - is there an up to date patchset? > > Yes, I've kept it up to date. In fact I've been using it in > every single 2.4 kernel I've built for the last 18+ months. > Lately also on ppc32 and x86-64. > > Below is the current UP micro-optimisation patch set for 2.4.22. > It changes p->processor, p->cpus_allowed, and p->cpus_runnable > accesses (reads and writes) to use inline functions. In UP kernels > these reduce to doing nothing or returning a constant. > > To keep the patch small, it doesn't change accesses in SMP-only code. > (This is also the reason why p->cpus_runnable only has a wrapper for > updates, since all reads are in SMP-only code.)
good to know ... will use it in my patchset (now with reference ;) let me know if you add/fix something ...
thanks for the patch, Herbert
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