Hi,
> On a ppc64 platform running 2.6.13-1, the virtual to physical mapping
> established by mmap'ing a hugetlbfs file does not seem to match the
> mapping described by get_user_pages().
I just tried a simple test - I created a program that allocated a
hugetlb page and wrote some stuff in it. I then attached with gdb and
dumped memory at that address and things came out OK.
That should have exercised the ptrace -> access_process_vm -> get_user_pages
path. So at least for this case get_user_pages seems to be working :)
It would be useful to simplify your problem a bit and take DMA out of
the picture. Moving this over to [email protected] would also
make sense.
Anton
-
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]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
| |
 |