On Sat, 2008-08-30 at 11:24 -0500, Scott Wood wrote: > On Fri, Aug 29, 2008 at 08:42:01AM +1000, Benjamin Herrenschmidt wrote: > > For the non-SMP case, I think it should be possible to optimize it. The > > only thing that can happen at interrupt time is hashing of kernel or > > vmalloc/ioremap pages, which shouldn't compete with set_pte on those > > pages, so there would be no access races there, but I may be missing > > something as it's the morning and I about just woke up :-) > > Is that still true with preemptible kernels?
Those shouldn't be an issue as long as we can't preempt while holding a spinlock and we do hold the pte lock on any modification... Of course, -rt is a different matter. Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
