On 02/01/2018 11:52 AM, Stefan Hajnoczi wrote:
On Wed, Jan 31, 2018 at 10:56:47AM -0500, JimR wrote:
Host: Fedora 26 with all patches on HP Pavilion 4-core 3.2 GHz
VMM 1.4.3
Guest: RHEL 7.4, server with GUI. (also CentOS 7 server with GUI, but never
running at the same time as rhel)
Guest invariably freezes, sometimes after 5 minutes, sometimes after 45
minutes. It will not accept any keyboard nor mouse input. This happens
when the only application running in guest is the terminal, but it is not
running anything, just waiting for my next command.
VMM shows CPU usage spikes and stays there. Host htop shows qemu is taking
100% of one core.
Please post the output of "mpstat -P ALL 1". mpstat is from the sysstat
package.
If you see 100% %usr then QEMU is spinning.
If you see 100% %guest then the guest is spinning.
The next step would be to drill down on what activity is taking 100%
CPU.
Have you installed the latest updates on the host and inside the guest?
Stefan
I'm not sure if you received my reply yesterday. It had a screen shot
of htop embedded. That seemed to bounce from majordomo.
Here is some additional info from a freeze this morning. This is from
the guest's /var/log/messages. Note that the Call Trace repeated 7
times just before the freeze.
Feb 2 09:39:48 rhcsa kernel: INFO: task systemd:1 blocked for more than
120 seconds.
Feb 2 09:39:48 rhcsa kernel: "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Feb 2 09:39:48 rhcsa kernel: systemd D ffff88003dba0000 0
1 0 0x00000000
Feb 2 09:39:48 rhcsa kernel: Call Trace:
Feb 2 09:39:48 rhcsa kernel: [<ffffffff816ab8a9>] schedule+0x29/0x70
Feb 2 09:39:48 rhcsa kernel: [<ffffffff810625bf>]
kvm_async_pf_task_wait+0x1df/0x230
Feb 2 09:39:48 rhcsa kernel: [<ffffffff810b3690>] ?
wake_up_atomic_t+0x30/0x30
Feb 2 09:39:48 rhcsa kernel: [<ffffffff816afc00>] ? error_swapgs+0x61/0x18d
Feb 2 09:39:48 rhcsa kernel: [<ffffffff816afcef>] ?
error_swapgs+0x150/0x18d
Feb 2 09:39:48 rhcsa kernel: [<ffffffff816b32d6>]
do_async_page_fault+0x96/0xd0
Feb 2 09:39:48 rhcsa kernel: [<ffffffff816af928>]
async_page_fault+0x28/0x30
Feb 2 09:39:48 rhcsa kernel: INFO: task crond:999 blocked for more than
120 seconds.
Feb 2 09:39:48 rhcsa kernel: "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Feb 2 09:39:48 rhcsa kernel: crond D ffff880036421fa0 0
999 1 0x00000080
Thanks,
JimR
