On 17.11.2011 14:18, Avi Kivity wrote:
+ copy_from_guest(vcpu,&pfault_token, vcpu->arch.pfault_token,
+ 8);
Missing error check?
Good catch, will fix.
+ init = kzalloc(sizeof(*init), GFP_ATOMIC);
+ if (!init)
+ return;
+
+ done = kzalloc(sizeof(*done), GFP_ATOMIC);
+ if (!done)
+ goto out_init;
+
+ event = kzalloc(sizeof(*event), GFP_ATOMIC);
+ if (!event)
+ goto out_done;
Three allocs? Maybe combine them? Even if their lifetimes are not
exactly the same.
The interrupt stack frees the interrupt info types for done and
init in context of the target vcpu thread when delivering. Thus,
as far as I can see, these cannot be easily converged.
Is this duplicating virt/kvm/async_pf.c?
We intend to be able to backport this to 2.6.32 for RHEL6. async_pf.c
relies on asynchonous work items which is not available on RHEL6. Thus
we decided to go forward with our own implementation first, and move
towards an aproach similar to async_pf.c as soon as we find time for
it. I think in the end both pathes can and should be converged. The
implementation in async_pf.c clearly has advantages over this approach.
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