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[Bug 1807073] Re: qemu-guest-agent stop work when fsfreeze

From: Thomas Huth
Subject: [Bug 1807073] Re: qemu-guest-agent stop work when fsfreeze
Date: Tue, 20 Apr 2021 06:50:04 -0000

The QEMU project is currently considering to move its bug tracking to another 
system. For this we need to know which bugs are still valid and which could be 
closed already. Thus we are setting older bugs to "Incomplete" now.
If you still think this bug report here is valid, then please switch the state 
back to "New" within the next 60 days, otherwise this report will be marked as 
"Expired". Or mark it as "Fix Released" if the problem has been solved with a 
newer version of QEMU already. Thank you and sorry for the inconvenience.

** Changed in: qemu
       Status: New => Incomplete

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  qemu-guest-agent stop work when fsfreeze

Status in QEMU:

Bug description:
  Create a live snapshot, we should first to fsfreeze the file system. We do 
have only one disk mounted to /:
  Filesystem      Size  Used Avail Use% Mounted on
  udev             48G     0   48G   0% /dev
  tmpfs           9.5G  8.7M  9.5G   1% /run
  /dev/vda1       485G  1.5G  484G   1% /
  tmpfs            48G     0   48G   0% /dev/shm
  tmpfs           5.0M     0  5.0M   0% /run/lock
  tmpfs            48G     0   48G   0% /sys/fs/cgroup
  tmpfs           9.5G     0  9.5G   0% /run/user/0

  snapshot action is OK, when we restore the snapshot, the file system became 
read-only, and syslog seems stop writing until we fsck /dev/vda1 and mount -o 
rw,remount /:
  Dec  5 00:39:16 systemd[1]: Started Session 180 of user root.
  Dec  5 00:45:05 qemu-ga: info: guest-fsfreeze called
  Dec  5 07:00:45 kernel: [  114.623823] EXT4-fs (vda1): re-mounted. Opts: 

  So after snapshoting, wo do fsthaw the file system,  maybe the qga
  dose not respond or stop work, this action dose not execute
  successfully and there is no log to show the status of qemu-guest-

  libvirt 1.2.17
  qemu 2.3.0
  qemu-guest-agent 2.5

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