On Thu, Jun 1, 2017 at 1:56 PM, Andrey Korolyov <and...@xdel.ru> wrote:
> On Thu, Jun 1, 2017 at 1:38 PM, Vladyslav Drok <vd...@mirantis.com> wrote: > > Hello qemu community! > > > > I come from openstack world, and one of our customers complains about an > > issue with huge pages on compute nodes. From the "virsh frepages --all" > and > > "cat /proc/meminfo", they see that 4 huge pages are consumed: > > > > http://paste.openstack.org/show/611186/ > > > > In total there are 239 1G pages, 120 in numa node 0, and 119 in numa node > > 1. There are no VMs running at this point. > > > > When trying to find out what consumes the 4 1G huge pages from node 0, I > > was suggesting "grep 1048576 /proc/*/numa_maps" to find out which > processes > > are using 1G pages, but in this particular case it shows no processes. > > While when some VM is running, I can see the qemu process that's > consuming > > huge pages, numa_maps reports the correct amount of pages, corresponding > to > > what has been requested for the VM's RAM. > > > > Are there any recommended ways for trying to track what consumes these 4 > > "lost" pages? (I might be a bit slow providing more info, as I don't have > > access to this environment :( ) > > > > Thanks, > > Vlad > > Could you please try to walk against /proc/[0-9]/smaps to check that > these pages are not claimed by any process? > Thanks for the suggestion! Will provide the results as soon as I have it.
