On 27 Nov 2007 at 13:50, [EMAIL PROTECTED] wrote: > Change loops controlled by 'for (i = 0; i < NR_CPUS; i++)' to use > 'for_each_possible_cpu(i)' when there's a _remote possibility_ of > dereferencing a non-allocated per_cpu variable involved.
actually, it's not that remote, it happens every time NR_CPUS > num_possible_cpus(). i ran into this myself on a dual core box with NR_CPUS=4. due to my rewrite of the i386 per-cpu segment handling, i actually got a NULL deref where the vanilla kernel would be accessing the area of [__per_cpu_start, __per_cpu_end] for each non-possible CPU (which doesn't crash per se but is still not correct somehow i think). - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
