Le jeudi 17 mars 2011 Ã 12:46 -0500, Christoph Lameter a Ãcrit : > On Thu, 17 Mar 2011, Eric Dumazet wrote: > > > When we know we run from BH context, we can use __this_cpu_inc(), but if > > we dont know or run from user/process context, we would need irqsafe_inc > > variant. > > If the BH context is the only one where we care about performance then its > ok I would think. Hmm... yes. By the way, I noticed : DECLARE_PER_CPU(u64, xt_u64); __this_cpu_add(xt_u64, 2) translates to following x86_32 code : mov $xt_u64,%eax add %fs:0x0,%eax addl $0x2,(%eax) adcl $0x0,0x4(%eax) I wonder why we dont use : addl $0x2,%fs:xt_u64 addcl $0x0,%fs:xt_u64+4 -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
