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Date: Tue, 28 Nov 2017 00:26:58 -0600
From: (Eric W. Biederman)
To: Linus Torvalds <>
Cc: "Tobin C. Harding" <>,  "Jason A. Donenfeld"
 <>,  "Theodore Ts'o" <>,  Kees Cook
 <>,  Paolo Bonzini <>,  Tycho
 Andersen <>,  "Roberts\, William C"
 <>,  Tejun Heo <>,  Jordan Glover
 <>,  Greg KH <>,
  Petr Mladek <>,  Joe Perches <>,  Ian
 Campbell <>,  Sergey Senozhatsky
 <>,  Catalin Marinas
 <>,  Will Deacon <>,  Steven
 Rostedt <>,  Chris Fries <>,  Dave
 Weinstein <>,  Daniel Micay <>,
  Djalal Harouni <>,  Radim Krčmář
 <>,  Linux Kernel Mailing List
 <>,  KVM list <>,
Subject: Re: [PATCH 0/5] add printk specifier %px, unique identifier

Linus Torvalds <> writes:

> On Mon, Nov 27, 2017 at 4:03 PM, Linus Torvalds
> <> wrote:
>> So the big remaining ones for me are the /proc/<pid>/stack (stack
>> pointers) and the /proc/net/* ones.
>> I'm a bit disappointed that those haven't been fixed already and
>> aren't even in this series..
> Oh well, I just did /proc/<pid>/stack by making it just print 0
> unconditionally rather than the hex number.


I know I have used /proc/<pid>/stack manually many times when looking
at a system where something is hung/weird and I needed to see what is
going on.  The backtrace inside the kernel can be invaluable.

At the same time I don't know if we actually need the hex address.
But please don't break that interface it is very useful.


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