Badari Pulavarty wrote:
> Hi,
>
> Is select(0, ..) is a valid operation ?
>
> I see that there is no check to prevent this or return
> success early, without doing any work. Do we need one ?
>
> slub code is complaining that we are doing kmalloc(0).
>
select(0, ...) is valid, and is functionally equivalent to
select(..., NULL, NULL, NULL, ...); except that any nonzero fdsets get
zeroed on return. As such, the only thing that can interrupt it is the
timeout, or a signal.
-hpa
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