Quoth Richard B. Johnson:
> On Tue, 8 Jul 2003, Jamie Lokier wrote:
>
> > Richard B. Johnson wrote:
> > > mmap2(0xb8000, 8192, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, 3, 0xb8000) = 0xb8000
> >
> > You meant to write:
> >
> > mmap2(0xb8000, 8192, PROT_READ|PROT_WRITE,
> > MAP_SHARED|MAP_FIXED, 3, 0xb8000 >> 12);
> >
> > The offset argument to mmap2 is divided by PAGE_SIZE.
> > That is the whole point of mmap2 :)
> >
> > -- Jamie
>
> Okay. Do you know where that's documented? Nothing in linux/Documentation,
> and nothing in any headers. Do you have to read the code to find out?
>
> So, the address is now the offset in PAGES, not bytes. Seems logical,
> but there is no clue in any documentation.
With the possible exception of the man mmap2 ;-)
DESCRIPTION
The function mmap2 operates in exactly the same way as
mmap(2), except that the final argument specifies the off
set into the file in units of the system page size
(instead of bytes). This enables applications that use a
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