Re: [Xen-devel] printk() incomplete

[Juergen Gross <jgross@xxxxxxxx>]

On 25/11/16 04:11, Yuming Wu wrote:
> Hi,
> 
> I'm debugging some xen code during hypervisor initialization. Before it
> reset stack and jump to cpu loop, I triggered a bug (may be change a
> readonly page). Usually, system will panic and give me stack info and
> backtrace. But before printk finish printing initialization message it
> just crash leaving an incomplete log. 
> 
> How can I make it flush log buffer more frequently or how can I get a
> full log/backtrace before system crash? 
> 
> I'm using serial ttyS2 to debug xen. dom0 earlyprink is xen.

Add "sync_console" to your hypervisor boot parameters.


Juergen

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