On 08/20/2012 04:56 PM, Richard Davies wrote: > We're running host kernel 3.5.1 and qemu-kvm 1.1.1. > > I hadn't though about it, but I agree this is related to cpu overcommit. The > slow boots are intermittent (and infrequent) with cpu overcommit whereas I > don't think it occurs without cpu overcommit. > > In addition, if there is a slow boot ongoing, and you kill some other VMs to > reduce cpu overcommit then this will sometimes speed it up. > > I guess the question is why even with overcommit most boots are fine, but > some small fraction then go slow?
Could be a bug. The scheduler and the spin-loop handling code fight each other instead of working well. Please provide snapshots of 'perf top' while a slow boot is in progress. -- error compiling committee.c: too many arguments to function
