On 07/15/2013 04:14 PM, Josh Boyer wrote: > On Mon, Jul 15, 2013 at 1:21 PM, Prarit Bhargava <prarit@xxxxxxxxxx> wrote: >> I've done some testing across various systems (both "large" and "small"). >> Increasing NR_CPUS seems to have a negligible effect. I see about a 1.1M >> increase in memory usage when switching between 128 cpus and 5120 cpus. Since >> most systems ship with 4G or more these days, I cannot see an issue with >> consuming a small amount of memory like this. > > 1.1M isn't small. We recently declined to build btrfs into the kernel > because it increased the overall memory usage by a similar amount. > Also, we regularly see users and bug reports still in the 2G range. OOC what was the objection to 1M? Is there some lower limit I should be concerned about? > While it's not an apples to apples comparison, far more Fedora users > are going to be using btrfs than > 128 CPUs. I'm not saying no > immediately, but I'm kinda dubious as to the benefits for Fedora. > We're already exceeding 128 cpus on a regular basis (or at least I am). Getting testing in the upper range only improves Fedora ... IMO. P. > josh _______________________________________________ kernel mailing list kernel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/kernel
