Re: doubt about VMA struct

["sandeep lahane" <sandeep.lahane@xxxxxxxxx>]

On 3/21/07, Rajat Jain <rajat.noida.india@xxxxxxxxx> wrote:
> >
> > Open and close are called when a region is created and deleted respectively.
> > no_page is used during page faults for locating the pages and
> > allocating it if needed etc.
> >
> > > Does it means accessing a virtual address space for a process is not
> > > allowed if open fails or is not allowed?( suppose i do that
> > > delibarately in my module ).
> >
> > if open fails then it should mean that the region is not created how
> > would you access it then?
> >
>
> IMHO, the region is ALREAY CREATED when open is called, hence open()
> method cannot affect the creation / deletion of the region in any way.
> Also, there cannot be a "failed" open() call, since the return value
> is void. The open is merely called to give the driver a chance to
> initialize the region.

The open() and close() functions are called every time a region is created or
deleted.

Did i misinterpret this? I think I did....I think you are correct. Let
me look up some code.
--

Regards,
Sandeep.

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