Re: [PATCH 3/4] Watchdog exit handling support

[Scott Wood <scottwood@freescale.com>]

On 07/05/2012 08:16 PM, Bhushan Bharat-R65777 wrote:
> 
> 
>> -----Original Message-----
>> From: Wood Scott-B07421
>> Sent: Friday, July 06, 2012 6:30 AM
>> To: Bhushan Bharat-R65777
>> Cc: Wood Scott-B07421; qemu-ppc@nongnu.org; kvm-ppc@vger.kernel.org;
>> agraf@suse.de
>> Subject: Re: [PATCH 3/4] Watchdog exit handling support
>>
>> On 07/05/2012 07:43 PM, Bhushan Bharat-R65777 wrote:
>>> Your initial comment was "We should probably call this function before
>>> returning to KVM". Which suggest that ioctls calls made by QEMU to
>>> enter KVM. I am a bit confused, now you want to avoid long delays in
>>> QEMU? This suggest whenever we exit to qemu, right?
>>
>> Whenever we exit to QEMU is one possibility, though it's probably too aggressive
>> (if the guest gets stuck in a loop that contains a QEMU exit, the watchdog won't
>> catch it).  Another option is to reset the state machine only when the guest
>> resumes from a debug halt.
> 
> Ok.
>
> Resetting the state machine does not disable watchdog, it will just
> ensure the longest time for debug halt etc. Is that ok ?

I'm talking about TSR, not TCR.  It's not about disabling the watchdog
or changing the period, but clearing any event that has happened when
leaving debug halt.

-Scott