[libvirt] [PATCH] vl: allow "cont" from panicked state

Paolo Bonzini pbonzini at redhat.com
Wed Aug 21 12:43:11 UTC 2013

Il 21/08/2013 14:42, Laszlo Ersek ha scritto:
> (*) Hm I think I understand why. main_loop_should_exit(), when a reset
> was requested *and* runstate_needs_reset() evaluated to true, used to
> set the runstate to PAUSED -- I guess temporarily.

Yes, this is the code that does the PANICKED -> PAUSED transition:

        if (runstate_needs_reset()) {

This is to move the system out of a runstate that needs_reset(), and
make the subsequent "cont" work instead of hitting this:

    if (runstate_needs_reset()) {
        error_set(errp, QERR_RESET_REQUIRED);


> Since PANICKED was included in runstate_needs_reset(), this generic code
> could request a transition from PANICKED to PAUSED (**). As PANICKED is
> being removed from runstate_needs_reset(), the PANICKED->PAUSED
> transition is not required any longer.
> (**) I don't know why the generic code moves to PAUSED temporarily (from
> INTERNAL_ERROR and SHUTDOWN), but I'll just accept that as status quo.

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