On Sun, 2010-09-19 at 08:38 +0200, Gleb Natapov wrote: > On Sat, Sep 18, 2010 at 08:27:54PM +0200, Conrad Wood wrote: > > On Sat, 2010-09-18 at 10:32 -0400, Kevin O'Connor wrote: > > > On Fri, Sep 17, 2010 at 11:39:36PM +0200, Conrad Wood wrote: > > > > Hi everyone, > > > > > > > > I'm currently looking into hotplugging CPUs. > > > > This exclusively with linux-guests and linux-host. > > > > I have found some (conflicting) information about this on the net. > > > > [...] Well, I got a bit further - thanks so far for your help. Given 1. kvm-72 2. linux-guest-kernel 2.6.35.4 3. kernel cmdline "maxcpus=32 possible_cpus=32" I can set "cpu_set 5 online" in the monitor and get indeed a new cpu appearing in /sys/devices..., which I can then set online in the guest by doing echo 1 >/sys/devices/.../online. /proc/cpuinfo in the guest then reports the new cpu. But... why does the command "info cpus" in the monitor report all cpus apart from CPU0 as (halted) ? echo 1 >/sys/devices.../online makes no difference to what "info cpus" reports, even though the guests /proc/cpuinfo shows expected behaviour. Sorry to bother everyone, just trying to understand this. How, if at all, are the guests' cpus mapped to physical cpus or cores on the host? Conrad -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
