In the last two weeks we have commited a few things which significantly speed up disk and network io. i will mention two things.
some of you can start cranking the kern.bufcachepercent sysctl to 90. try it out. be impressed, but don't report deadlocks or lockups; however real crashes are worth knowing about. the lockup situations are largely understood and will be slowly worked out, which is why this is not close to being the default. the other change is that interrupt servicing times have gone down substantially. there are some broken drivers we will need to find and fix, so please watch your vmstat -i numbers carefully, and for this circumstance, if you get machine lockups at boot please report those very carefully in a PR (with an old working dmesg). thanks.
