Re: [Xen-devel] [PATCH V2] common/vm_event: Prevent guest locking with large max_vcpus

[Tamas K Lengyel <tamas@xxxxxxxxxxxxx>]

> @@ -316,8 +302,9 @@ void vm_event_put_request(struct domain *d,
>       * See the comments above wake_blocked() for more information
>       * on how this mechanism works to avoid waiting. */
>      avail_req = vm_event_ring_available(ved);
> -    if( current->domain == d && avail_req < d->max_vcpus )
> -        vm_event_mark_and_pause(current, ved);
> +    if( curr->domain == d && avail_req < d->max_vcpus /* &&
> +        !atomic_read(&curr->vm_event_pause_count) */ )

Seems like you left the atomic_read in a comment block here (I assume
while testing if the waking code now works as expected).

Tamas

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