On Tue, 2 Oct 2007, Thayne Harbaugh wrote:
> On Tue, 2007-10-02 at 07:15 +0200, Andi Kleen wrote:
>
> > For mmap you can emulate it by passing a low hint != 0 (e.g. getpagesize())
> > in address but without MAP_FIXED and checking if the result is not beyond
> > your range.
>
> Cool. That's a much better solution for multiple reasons - like you
> mention, MAP_32BIT is only 2GB as well as it's only available on x86_64.
>
> > > > Given for mremap() it is not that easy because there is no "hint" argument
> > > > without MREMAP_FIXED; but unless someone really needs it i would prefer
> > > > to not propagate the hack. If it's really needed it's probably better
> > > > to implement a start search hint for mremap()
I think you can do it already, without us complicating mremap further
with such a start search hint.
First call mmap with a low hint address, the new size you'll be wanting
from the mremap, PROT_NONE, MAP_ANONYMOUS, -1, 0. Then call mremap with
old address, old size, new size, MREMAP_MAYMOVE|MREMAP_FIXED, and new
address as returned by the preparatory mmap.
Hugh
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
