[pve-devel] cpu 100% when get vmstaus

[lulin]

Hi
I don't know if it is a bug, sometimes when you shudown a VM,  pvedaemon will have 100% cpu usage.
bellow is 'top' output:
------------------------------
Tasks: 761 total,   3 running, 758 sleeping,   0 stopped,   0 zombie
Cpu(s): 14.0%us,  2.8%sy,  0.0%ni, 83.2%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:  49378500k total, 45560112k used,  3818388k free,    17408k buffers
Swap: 24764408k total,  4106172k used, 20658236k free,  2291944k cached


  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                        
31347 root      20   0  209m  41m 3664 R 99.6  0.1  44:36.22 pvedaemon 
-----------------------------
I print some logs to trace it, and find it is deadloop in QMPclient.pm:


240     for (;;) {
241
242         $running = &$check_queue($self);
243
244         last if !$running;
245
246         $self->{mux}->loop;
247     }


it seems if a vm is shutdown, the QMP socket can't have a close notify, and use 'netstat' command you can find a connection always stay in CLOSE_WAIT:
[root at OVPMAIN ~]# netstat -antop |grep pvedaemon
tcp        0      0 127.0.0.1:85                0.0.0.0:*                   LISTEN      1018/pvedaemon work off (0.00/0/0)
tcp        1      0 127.0.0.1:85                127.0.0.1:49246             CLOSE_WAIT  31347/pvedaemon wor off (0.00/0/0)


I tried to change the tcp_keepalive_* param in /proc, but not work since keepalive is disabled by default...


Any one have some idea?




Regards


Lenny


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