Re: [Xen-devel] Clock Interrupt not occurring. hypervisor_callback not being called.

[Dave Winchell <dwinchell@xxxxxxxxxxxxxxx>]

Have you tried making evtchn_pending and evtchn_mask volatile in
shared_info_t?

-Dave Winchell

Ivan Kelly wrote:

> Im having a strange problem with a hypervisor_callback that I have 
> written.
> Im setting up VIRQ_TIMER and have added a handler for it. The 
> evtchn_mask bit, evtchn_pending bit, evtchn_upcall_mask, 
> evtchn_upcall_pending and evtchn_pending_sel>>5 bit are all zeroed.
> I have a loop running, outputting text to the console in the main 
> thread of execution. When I run my kernel, this thread will run 
> continuous, and never be interrupted by the evtchn handler. Im 
> printing out the values of all the relevant fields(masks and pending 
> etc) and they all seem to be set correctly, but nothing happens.
> Curiously, when I add a print statement to the do_hypervisor_callback 
> function, the callback seems to work correctly. Does anyone have any 
> idea why this could be happening?
> Best regards
> Ivan Kelly
>
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