Re: [PATCH 0/5] add printk specifier %px, unique identifier

Linus Torvalds
2017-11-28T17:33:19Z

On Mon, Nov 27, 2017 at 10:26 PM, Eric W. Biederman
<ebiederm@xmission.com> wrote:
>>
>> Oh well, I just did /proc/<pid>/stack by making it just print 0
>> unconditionally rather than the hex number.
>
> Patch?

Oh, apparently I never pushed out yesterday.

The patch literally just affects the (useless) hex number. So:

cat /proc/self/stack

now prints out

[<0>] proc_pid_stack+0xaa/0x100
[<0>] proc_single_show+0x48/0x80
[<0>] seq_read+0xd2/0x410
...

instead of putting some randomized kernel address there.

I considered getting rid of the whole "[<>]" thing, but that's where
"maybe there are tools that parse this" came in.

I doubt there are any, though. If proc-ps doesn't look at this, I
don't know what could. But the format change might as well be a
separate thing if somebody cares deeply.

Linus