Re: [RESEND][mmotm][PATCH v2, 0/5] elf coredump: Add extended numbering support

Andrew Morton
2010-01-08T00:30:38Z

On Mon, 04 Jan 2010 10:06:07 +0900 (JST)
Daisuke HATAYAMA <d.hatayama@jp.fujitsu.com> wrote:

> The current ELF dumper can produce broken corefiles if program headers
> exceed 65535. In particular, the program in 64-bit environment often
> demands more than 65535 mmaps. If you google max_map_count, then you
> can find many users facing this problem.
>
> Solaris has already dealt with this issue, and other OSes have also
> adopted the same method as in Solaris. Currently, Sun's document and
> AMD 64 ABI include the description for the extension, where they call
> the extension Extended Numbering. See Reference for further information.
>
> I believe that linux kernel should adopt the same way as they did, so
> I've written this patch.
>
> I am also preparing for patches of GDB and binutils.

That's a beautifully presented patchset. Thanks for doing all that
work - it helps.

UML maintenance appears to have ceased in recent times, so if we wish
to have these changes runtime tested (we should) then I think it would
be best if you could find someone to do that please.

And no akpm code-review would be complete without: dump_seek() is
waaaay to large to be inlined. Is there some common .c file to where
we could move it?