On Tue, 2006-02-28 at 09:34, Andrew Morton wrote:
> "Zhang, Yanmin" <yanmin_zhang@linux.intel.com> wrote:
> >
> > > > > > 2.6.16-rc3 uses hugetlb on-demand paging, but it doesn_t support hugetlb
> >  > > > > mprotect. My patch against 2.6.16-rc3 enables this capability.
> > 
> >  Based on David's comments, I worked out a new patch against 2.6.16-rc4.
> >  Thank David.
> > 
> 
> Please always send an updated changelog when sending an updated patch. 
> Otherwise I have to go trolling back through the email thread to find it,
> then work out what needs to be changed.
Thanks for your kind reminder. I would do so next time.

> 
> > 
> >  I tested it on i386/x86_64/ia64. Who could help test it on other
> >  platforms, such like PPC64?
> 
> I can do that - please send me your test app?
I attach a test case. It will create directory /mnt/hugepages and delete it
after testing automatically.

To run it by user root:
#gcc -o mprotect_testcase mprotect_testcase.c
#echo "5">/proc/sys/vm/nr_hugepages
#./mprotect_testcase

You could use gdb to step it to see the changing of the process vma maps.

Thanks.