qemu-kvm process hangs in RHEL 5.9 hypervisor.

Issue

• libvirtd is segfaulting and a qemu-kvm process is showing task blocked messages.

libvirtd[15827]: segfault at 0000000000000008 rip 00002b4900047f02 rsp 00002b4903e11570 error 4
snmpd[15527] general protection rip:2b73157d2f02 rsp:7fffcb9ee2a0 error:0
INFO: task qemu-kvm:16375 blocked for more than 300 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
qemu-kvm      D ffff8112550e9aa0     0 16375      1         16378 16184 (NOTLB)
 ffff81125534fd28 0000000000000082 ffff81183e537268 ffff81183fb743b8
 ffff81183fb743b8 0000000000000009 ffff81183e537080 ffff81183ff897f0
 00019788330c0a8c 000000000001877f ffff81183e537268 00000003800a5d0e
Call Trace:
 [<ffffffff80063c63>] __mutex_lock_slowpath+0x60/0x9b
 [<ffffffff80063cad>] .text.lock.mutex+0xf/0x14
 [<ffffffff800d67c9>] swap_info_get+0x6a/0xa3
 [<ffffffff883c98c9>] :kvm:vcpu_load+0x13/0x34
 [<ffffffff883d0d8e>] :kvm:kvm_arch_vcpu_ioctl+0x16e/0x676
 [<ffffffff883cb2cc>] :kvm:kvm_vcpu_ioctl+0x3e9/0x448
 [<ffffffff800227e8>] __up_read+0x19/0x7f
 [<ffffffff800671cf>] do_page_fault+0x4cc/0x842
 [<ffffffff800424e0>] do_ioctl+0x21/0x6b
 [<ffffffff800304df>] vfs_ioctl+0x457/0x4b9
 [<ffffffff800bafe9>] audit_syscall_entry+0x1a8/0x1d3
 [<ffffffff8004c8e4>] sys_ioctl+0x59/0x78
 [<ffffffff8005d29e>] tracesys+0xd5/0xdf