Re: [Xen-users] task xenwatch blocked for more than 120 seconds.

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Jan 20, 2017 at 12:59:46PM +0000, 席康杰 wrote:
> Hello,
> 
>     My server ran about 4days, the kernel crash.
> 
> /var/log/message：
> 
> Jan 20 08:05:38 es13 kernel: INFO: task xenwatch:129 blocked for more than 
> 120 seconds.
> Jan 20 08:05:38 es13 kernel: "echo 0 > 
> /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> Jan 20 08:05:38 es13 kernel: xenwatch        D ffff8808fea943c0     0   129   
>    2 0x00000000
> Jan 20 08:05:38 es13 kernel: ffff8808a6909d18 0000000000000246 
> ffff8808a6909fd8 00000000000143c0
> Jan 20 08:05:38 es13 kernel: ffff8808a6908010 00000000000143c0 
> 00000000000143c0 00000000000143c0
> Jan 20 08:05:38 es13 kernel: ffff8808a6909fd8 00000000000143c0 
> ffff8808a6907540 ffff8808a7720ac0
> Jan 20 08:05:38 es13 kernel: Call Trace:
> Jan 20 08:05:38 es13 kernel: [<ffffffff815f4339>] schedule+0x29/0x70
> Jan 20 08:05:38 es13 kernel: [<ffffffffa04675c5>] xenvif_disconnect+0x85/0xe0 
> [xen_netback]

Something is holding resources indefinitely.

> 
> Xen version is 4.8.0, Linux kernel version is 3.10.20-11, does I need to 
> upgrade linux kernel?
> 

Yeah, upgrading to the latest stable Linux kernel would be a good start.
3.10 is really too old.

Wei.

> - xikangjie

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