Bug#711592: Current x86 linux kernel is misconfigured.

From	Diederik de Haas <didi.debian@cknow.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#711592: Current x86 linux kernel is misconfigured.
Date	2022-06-14 14:30 +0200
Message-ID	<EydQe-4KTm-25@gated-at.bofh.it> (permalink)
References	<limQN-1li-1@gated-at.bofh.it> <Ey0zD-4CVd-1@gated-at.bofh.it> <limQN-1li-1@gated-at.bofh.it> <Ey0zD-4CVd-1@gated-at.bofh.it>
Organization	Connecting Knowledge

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> > On 8 Jun 2013 09:32:48 +0100 Robert de Bath <robert$@debath.co.uk> wrote:
> > > Package: linux-image-686-pae
> > > 
> > > On current Debian kernels the the WCHAN column for procps is NOT
> > > working.
> > > Run this command:
> > > # cat /proc/*/wchan
> > > 
> > > For current Debian kernels you get all zeros
> > 
> > # cat /proc/*/wchan
> > do_epoll_waitdo_selectdo_sys_polldo_sys_polldo_epoll_waitdo_epoll_waitdo_s
> > elect
> > 
> > [IOW: working for me on an amd64 5.18.2-1 kernel]
> 
> I was able to narrow this down a bit with snapshots of each release:
> 
> - broken in squeeze, wheezy, and jessie
> - partly fixed in stretch and buster (wchan shows function names for
>   most sleeping threads, subject to privilege check)
> - broken again in bullseye
> - fully fixed in 5.16.14-1 (wchan shows function names for all sleeping
>   threads, subject to privilege check)
> 
> Given that, I think this can be closed with version 5.16.14-1.

Robert: can you confirm that the issue is fixed for you with a 5.16.14-1 kernel 
or later?
Currently, Stable Backports has version 5.16.12-1~bpo11+1, which should still 
have the issue, but IIUC a new Stable Backports kernel is in the works.

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Bug#711592: Current x86 linux kernel is misconfigured. Diederik de Haas <didi.debian@cknow.org> - 2022-06-11 01:50 +0200
  Bug#711592: Current x86 linux kernel is misconfigured. Ben Hutchings <ben@decadent.org.uk> - 2022-06-14 00:20 +0200
    Bug#711592: Current x86 linux kernel is misconfigured. Diederik de Haas <didi.debian@cknow.org> - 2022-06-14 14:30 +0200

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