From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 54071] New: kvm guests stuck (not in io) and cannot be killed
using -9
Date: Tue, 19 Feb 2013 07:40:16 +0000 (UTC)
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https://bugzilla.kernel.org/show_bug.cgi?id=54071
Summary: kvm guests stuck (not in io) and cannot be killed
using -9
Product: Virtualization
Version: unspecified
Kernel Version: 3.5.0-23.35
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: kvm
AssignedTo: virtualization_kvm@kernel-bugs.osdl.org
ReportedBy: info@corinlangosch.com
Regression: No
I have two stuck kvm guests hanging in state R (for several hours now) on two
different hosts. Actually they are not consuming any CPU and cannot be killed
with kill -9. They are not responding to anything. Both systems are Ubuntu
12.10 Quantal running on a AMD II X4 965 Processor with 16GB RAM.
Stack trace of the first stuck guest:
cat /proc/2647/stack
[] retint_careful+0x14/0x32
[] 0xffffffffffffffff
Stack trace of the second stuck guest:
cat /proc/11932/stack
[] __cond_resched+0x2a/0x40
[] try_to_unmap_file+0x3a/0x6d0
[] try_to_unmap+0x31/0x70
[] migrate_pages+0x318/0x500
[] compact_zone+0x1e4/0x350
[] try_to_compact_pages+0x16f/0x1d0
[] __alloc_pages_direct_compact+0xaa/0x191
[] __alloc_pages_nodemask+0x473/0x920
[] alloc_pages_current+0xb0/0x120
[] new_slab+0x22d/0x2c0
[] __slab_alloc+0x314/0x46e
[] __kmalloc_node_track_caller+0xa1/0x1b0
[] __alloc_skb+0x79/0x230
[] sock_alloc_send_pskb+0x1d1/0x320
[] tun_get_user+0x131/0x4a0
[] tun_chr_aio_write+0x69/0x90
[] do_sync_readv_writev+0xda/0x120
[] do_readv_writev+0xd4/0x1e0
[] vfs_writev+0x35/0x60
[] sys_writev+0x4a/0xb0
[] system_call_fastpath+0x16/0x1b
[] 0xffffffffffffffff
Packages:
Kernel: 3.5.0-23-generic #35-Ubuntu SMP Thu Jan 24 13:15:40 UTC 2013 x86_64
x86_64 x86_64 GNU/Linux
KVM: 1.2.0+noroms-0ubuntu2.12.10.2
Command line:
kvm -name vm-16762 -machine pc-1.2 -enable-kvm -cpu kvm64 -smp
sockets=1,cores=2 -m 1024 -vga cirrus -drive
id=drive1245,if=none,cache=writeback,aio=native,format=raw,media=disk,file=rbd:kvm1/vm-16762-disk-1
-device virtio-blk-pci,id=hdrive1245,addr=0x12,drive=drive1245 -netdev
tap,id=netdev1243,ifname=tap1243,script=,downscript= -device
virtio-net-pci,id=nic1243,addr=0x03,mac=02:48:6e:2b:4e:55,netdev=netdev1243
-chardev socket,id=qmp,path=/var/run/kvm/vm-16762/qmp,server,nowait -mon
chardev=qmp,mode=control -monitor unix:/var/run/kvm/vm-16762/mon,server,nowait
-vnc 10.0.0.60:21,password -usbdevice tablet -nodefaults -pidfile
/var/run/kvm/vm-16762/pid -boot menu=on -k de -chroot /var/run/kvm/vm-16762
-runas kvm -daemonize
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