On Mon, Jun 10, 2002 at 05:47:35PM -0700, Thomas Bushnell, BSG wrote:
> Marcus Brinkmann <[EMAIL PROTECTED]> writes:
>
> > This is not a strict requirement. A server can do any of the following:
> >
> > 1. Allocate a new, large enough buffer.
> > 2. Just return fewer data.
> >
> > and a server can even:
> >
> > 3. Return a new buffer although the old one was large enough.
>
> None of this is really the server's doing; most of it is MiG.
But diskfs/io-read.c does contain a call to mmap(), so is it just some kind of
`sanity check'? If MiG allocates a new buffer, how can we deallocated it: can
we munmap() it assuming that the buffer size is the one returned in the `len'
argument of io_read()? E.g.:
err = io_read (file, (data_t*)&data, len, offset, size);
munmap (data, *len);
Thanks,
Ludovic.
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