Re: [Xen-devel] [PATCH 4/5] x86: use switch() in _put_page_type()

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 04.12.17 at 16:40, <andrew.cooper3@xxxxxxxxxx> wrote:
> On 04/12/17 10:46, Jan Beulich wrote:
>> Use this to cheaply add another assertion.
>>
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>> ---
>> TBD: Would it perhaps be better to return after the assertion?
> 
> Yes, otherwise we risk falling into an infinite continue loop.

I've used -EILSEQ, but no, there's no infinite loop potential here, as
there's a preemption check past the switch() statement (and there
was "break" rather than "continue" after the assertion). This and
the lack of reasonably suitable error code to return here was why
I didn't use "return" in the first version. Or did you mean "infinite
continuation loop" (affecting just the guest)?

> With a suitable return value, Reviewed-by: Andrew Cooper
> <andrew.cooper3@xxxxxxxxxx>

Thanks.

Jan


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