On Saturday 12 May 2007 18:14, Paul Jackson wrote: > > Ummm this is what I've been saying for over a year now but noone has been > > listening. > > Well ... if there is a problem using prefetch and cpusets together, > it doesn't look like the two of us are going to find it. > > I should probably look at your patch to answer this next question, > but being a lazy retard, I'll just ask. Is there a way, on a running > system that has your prefetch patch configured in, to disable prefetch > -- perhaps writing to some magic /proc file or something?
Indeed: /proc/sys/vm/swap_prefetch > If so, then how about you just remove the lines in the patch that > disable prefetch on kernels configured with CPUSETS, and we charge > ahead allowing both at the same time? Ok so change the default value for swap_prefetch to 0 when CPUSETS is enabled? Sure, I can do that. > If some day in the future I find something about prefetch that harms > the HPC NUMA loads I care about, then I can just dynamically disable > prefetch. > > If someone ever uncovers a real problem with prefetch and cpusets, > then we will deal with it then. > > As to whether your patch is otherwise (other than cpusets) worthy > of further acceptance, that I will have to leave up to those who are > competent to make such judgements. Thank you very much for your comments! -- -ck - 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/
