Bugs item #2989366, was opened at 2010-04-19 16:47
Message generated for change (Comment added) made by avik
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Category: None
Group: None
>Status: Pending
>Resolution: Fixed
Priority: 5
Private: No
Submitted By: tgr (tgr1)
Assigned to: Nobody/Anonymous (nobody)
Summary: huge memory leak (qemu-kvm 0.12.3)
Initial Comment:
CPU: Xeon E5450
KVM: qemu-kvm 0.12.3
Host: Debian Squeeze amd64, kernel 2.6.32
Guest: Debian Lenny amd64, kernel 2.6.26
qemu command line below (no helpers like libvirt used)
whether the problem goes away if using the -no-kvm-irqchip or -no-kvm-pit
switch: seems unrelated
whether the problem also appears with the -no-kvm switch: load profile of the
guest makes running without KVM infeasible
The problem: after 4 days, the kvm process of a guest run with -mem 3072 takes
12 GB VSZ / 9 GB RSS - grows until OOM ("kvm invoked oom-killer" in dmesg).
At that point the guest shows more than 2 GB of free memory.
qemu command line:
kvm -smp 4 -m 3072 -net nic,vlan=0,model=virtio,name=eth0,macaddr=x:x:x:x:x:x
-net tap,vlan=0,ifname=tap6 -net
nic,vlan=1,model=virtio,name=eth1,macaddr=x:x:x:x:x:x -net
tap,vlan=1,ifname=tap7 -drive if=virtio,file=/dev/x/x-rootfs,index=0 -drive
if=virtio,file=/dev/x/x-swap,index=1 -name x -nographic -kernel
/boot/vmlinuz-2.6.26-2-amd64 -initrd /boot/initrd.img-2.6.26-2-amd64 -append
root=/dev/vda console=ttyS0 -echr 2 -serial
mon:telnet:localhost:12344,server,nowait -monitor
unix:/var/run/kvm-x,server,nowait -daemonize -watchdog i6300esb
-watchdog-action reset
(the monitor on both telnet and unix socket is intentional, the one on the
socket is only used for sending system_reset and system_powerdown qemu
commands).
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>Comment By: Avi Kivity (avik)
Date: 2010-05-18 20:44
Message:
Should be fixed in qemu-kvm-0.12.4.
----------------------------------------------------------------------
Comment By: trevoro (trevoro)
Date: 2010-05-18 20:25
Message:
I am experiencing an identical issue on an AMD Sempron with qemu-kvm
0.12.3.
We have a few virtual machines running on this host. After a few days this
is what the memory utilization looks like for the KVM processes.
be95ae3e-5f79-11df-b0c0-540001bf0689 1024M: vsz=1241M rss=706M
3bd6f690-5c65-11df-9fb1-5400013f4a54 512M: vsz=675M rss=466M
c103e4e4-5e00-11df-94fe-540001fccc62 256M: vsz=1470M rss=301M
0c068dba-5df8-11df-938c-5400015669e3 256M: vsz=7646M rss=2560M
----------------------------------------------------------------------
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