Re: [libvirt] Found mem leak in livirt, need help to debug

Hi. There is a mem leak in libvirt, when doing external snapshot (for backup purposes). My KVM domain uses raw storage images via libgfapi. I'm using latest 1.2.21 libvirt (although previous versions act the same). My bash script for snapshot backup uses series of shell commands (virsh connect to a remote libvirt host): * virsh domblklist KVM * qemu-img create -f qcow2 -o backing_file=gluster(...) - precreate backing file * virsh snapshot-create KVM SNAP.xml (...) - create snapshot from precreated XML snapshot file * cp main img file * virsh blockcommit KVM disk (...) Backup script works fine, however libvirtd process gets bigger and bigger each time I run this script. Some proof of memleak: 32017 - libvirtd pid When libvirt started: # ps p 32017 o vsz,rss VSZ RSS 585736 15220 When I start KVM via virsh start KVM # ps p 32017 o vsz,rss VSZ RSS 1327968 125956 When i start backup script, after snapshot is created (lots of mem allocated) # ps p 32017 o vsz,rss VSZ RSS 3264544 537632 After backup script finished # ps p 32017 o vsz,rss VSZ RSS 3715920 644940 When i start backup script for a second time, after snapshot is created # ps p 32017 o vsz,rss VSZ RSS 5521424 1056352 And so on, until libvirt spills 'Out of memory' when connecting, ane being really huge process. Now, I would like to diagnose it further, to provide detailed information about memleak. I tried to use valgrind, but unfortunatelly I'm on Opteron 6380 platform, and valgrind doesn't support XOP quitting witch SIGILL. If someone could provide me with detailed information on how to get some usefull debug info about this memleak, i'll be more than happy to do it, and share results here.