Обсуждение: Re: [HACKERS] mmap and MAP_ANON

ocie@paracel.com wrote:
>
> Bruce Momjian wrote:
> >
> > Would people tell me what platforms do NOT support the MAP_ANON flag to
> > the mmap() system call?  You should find it in the mmap() manual page.
>
> Doesn't seem to appear in Linux (2.0.30 kernel).  As another poster
> commented, /dev/zero can be mapped for anonymous memory.

although 'man mmap' does not say it, it is present in sys/mman.h on
linux (at least 2.0.33)

it is NOT present in Solaris x86 v.2.6

it is NOT present in SINIX v5.42 (UNIX(r) System V Release 4.1)

--------------
Hannu Krosing

Hannu Krosing wrote:
>
> ocie@paracel.com wrote:
> >
> > Bruce Momjian wrote:
> > >
> > > Would people tell me what platforms do NOT support the MAP_ANON flag to
> > > the mmap() system call?  You should find it in the mmap() manual page.
> >
> > Doesn't seem to appear in Linux (2.0.30 kernel).  As another poster
> > commented, /dev/zero can be mapped for anonymous memory.
>
> although 'man mmap' does not say it, it is present in sys/mman.h on
> linux (at least 2.0.33)

It appears there, but using it causes mmap to return EINVAL.

Ocie