On Tue, Apr 24, 2007 at 10:47:45AM -0700, Christoph Lameter wrote: > On Tue, 24 Apr 2007, Siddha, Suresh B wrote: > > Anyhow, this is a straight forward optimization and needs to be done. Do you > > have any specific concerns? > > Yes there should not be contention on per cpu data in principle. The > point of per cpu data is for the cpu to have access to contention free > cachelines. > > If the data is contented then it should be moved out of per cpu data and > properly > placed to minimize contention. Otherwise we will get into cacheline > aliases (__read_mostly in per cpu??) etc etc in the per cpu areas.
yes, we were planning to move this to a different percpu section, where all the elements in this new section will be cacheline aligned(both at the start, aswell as end) thanks, suresh - 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/
