On 12/08/13 14:47, Josh Zhao wrote:
> Hi Andrew,
> What's the Watchdog used for in Xen?
>
> Josh

Xen can set up a hardware watchdog on each pcpu, to help ensure that it
doesn't get stuck in loops.  It is extra defence against bugs in Xen.

~Andrew

>
>
> 2013/8/12 Andrew Cooper <andrew.cooper3@citrix.com
> <mailto:andrew.cooper3@citrix.com>>
>
>     This series offers some improvements to Xen watchdogs.
>
>     Patch 1 moves the concept of a watchdog from x86 specific code to
>     common.
>     Patch 2 tweaks the x86 implementation, given the common
>     implementation.
>     Patch 3 is a bugfix for certain cases where the watchdog code
>     interacts badly with
>     console_force_unlock().
>
>     Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com
>     <mailto:andrew.cooper3@citrix.com>>
>     CC: Keir Fraser <keir@xen.org <mailto:keir@xen.org>>
>     CC: Jan Beulich <JBeulich@suse.com <mailto:JBeulich@suse.com>>
>     CC: Tim Deegan <tim@xen.org <mailto:tim@xen.org>>
>
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>
>