Re: [Xen-devel] MEM_SHARING_DEBUG

[sepanta s <sapanta992@xxxxxxxxx>]

On Mon, Jun 13, 2016 at 12:59 PM, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:

On Sun, Jun 12, 2016 at 02:37:29PM +0430, sepanta s wrote:
> Hi,
>
> how to does MEM_SHARING_DEBUG works in xen ?
> This function is located at and its internal structure is
> xen/arch/x86/mm/mem_sharing.c
> <https://github.com/mirage/xen/blob/a6f2cdb633bf519244a16674031b8034b581ba7f/xen/arch/x86/mm/mem_sharing.c>
> debugtrace_printk("*mem_sharing_debug*: %s(): " _f, __func__, ##_a)
> , so where the logs are being saved?

From reading the code it can be configured to go to the hypervisor
console. You then can use xl dmesg to view it.

Should I change the mem_debug_share to printk you mean?

dmesg buffer is limited and I miss some debugging info.
 

Note that you need to have a debug hypervisor to have debugtrace
support. Then you can use xl debug-keys T to toggle whether the output
goes to console directly or goes to internal buffer.

 I have enabled debugging in xen as I changed debug:= y in Config.mk.

But after compilation and reboot, when I select booting from xen hypervisor in the grub menu, my ubuntu goes beyond the initialzing ram and then it reboots.

Am I missing something?

Wei.

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