Re: Low limit for memory mapping
Gilles Chanteperdrix <[email protected]>
| Newsgroups | gmane.linux.ports.arm.general |
|---|---|
| Organization | Xenomai |
| Message-ID | <[email protected]> |
Frédéric Point wrote:
> Hi all,
>
> I tried to mmap with the MAP_FIXED flags set to some addresses
> starting at 0x1000 and mmap always return EPERM.
>
> However when I can read from this document
> (http://www.arm.linux.org.uk/developer/memory.txt):
>
> 00001000 TASK_SIZE-1 User space mappings
> Per-thread mappings are placed here via
> the mmap() system call.
>
> But I can only map memory above 0x9000 just after where the _text is
> mapped. Could someone point me out why I can't use the addresses
> between 0X1000 and 0x8000 ?
Maybe you need to tweak /proc/sys/vm/mmap_min_addr ?
--
Gilles.
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