On 3/4/21 10:08 PM, Like Xu wrote:
Hi John,
Thanks for your comment.
On 2021/3/5 7:53, John Snow wrote:
On 2/28/21 9:39 PM, Like Xu wrote:
Hi Genius,
I am a user of QEMU v4.2.0 and stuck in an interesting bug, which may
still exist in the mainline.
Thanks in advance to heroes who can take a look and share understanding.
Do you have a test case that reproduces on 5.2? It'd be nice to know
if it was still a problem in the latest source tree or not.
We narrowed down the source of the bug, which basically came from
the following qmp usage:
{'execute': 'human-monitor-command', 'arguments':{ 'command-line':
'drive_del replication0' } }
One of the test cases is the COLO usage (docs/colo-proxy.txt).
This issue is sporadic,the probability may be 1/15 for a io-heavy guest.
I believe it's reproducible on 5.2 and the latest tree.
Can you please test and confirm that this is the case, and then file a
bug report on the LP: https://launchpad.net/qemu and include:
- The exact commit you used (current origin/master debug build would be
the most ideal.)
- Which QEMU binary you are using (qemu-system-x86_64?)
- The shortest command line you are aware of that reproduces the problem
- The host OS and kernel version
- An updated call trace
- Any relevant commands issued prior to the one that caused the hang; or
detailed reproduction steps if possible.
Thanks,
--js
