Re: [tip:perf/urgent] perf symbols: Handle /proc/sys/kernel/kptr_restrict

[Linus Torvalds]

On Fri, May 27, 2011 at 1:35 AM, Ingo Molnar <mingo@xxxxxxx> wrote:
>
> I think the biggest problem is that it is yelling at us even when i'm
> root - and root can access all the pointer values just fine:

Instead of looking at the kptr_restrict file, please just look at the
addresses in the kallsyms file, and if they are all zero, you know
that it's not a usable kallsyms file (and you can pretty much assume
that it's due to kptr_restrict).

So I think the whole symbol__read_kptr_restrict() thing is just
pointless. Don't do it.

                     Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/