[pkg-lxc-devel] Bug#1036818: Bug#1036818: linux on armel/armhf: Perl library unable to access get CPU info from /proc/cpu or kstat

[Pierre-Elliott Bécue]

De : Mathias Gibbens <gibmat at debian.org>
À : Paul Gevers <elbrus at debian.org>; 1036818 at bugs.debian.org
Cc : Pierre-Elliott Bécue <peb at debian.org>; Evgeni Golov <evgeni at debian.org>; Jochen Sprickerhof <jspricke at debian.org>
Date : 1 juin 2023 13:33:33
Objet : Re: [pkg-lxc-devel] Bug#1036818: linux on armel/armhf: Perl library unable to access get CPU info from /proc/cpu or kstat

> On Mon, 2023-05-29 at 20:03 +0200, Paul Gevers wrote:
>> We have three layers here. The bare metal is arm64. It hosts several
>> arm* QEMU VM. Inside the VM we run the lxc. I put the output of all
>> three at the bottom. *Maybe* it's relevant that the bare metal still
>> runs bullseye while the VM's run bookworm. I'll also share the
>> content for an arm64 host (which is a VM where I don't have access to
>> the bare metal.)
> 
> [snip]
> 
>> # generating the container and showing inside
>> debian at ci-worker-armhf-01:~$ sudo lxc-copy -N elbrus
>> autopkgtest-unstable-armhf && sudo lxc-start elbrus && sudo lxc-
>> attach elbrus
>> root at elbrus:/# cat /proc/cpuinfo
>> root at elbrus:/# ls -al /proc/cpuinfo
>> -r--r--r-- 1 root root 3878 May 29 17:48 /proc/cpuinfo
> 
>   Yeah, that's definitely not right! I don't currently have an
> armel/armhf system to test on, but did try using the abel.d.o
> porterbox. lxcfs requires elevated permissions to start, which I don't
> have on that box.
> 
>   Some other things we can look at -- are there any errors/warnings in
> the lxcfs service journal and/or the system's dmesg that is running
> lxcfs? It might also be useful to start lxcfs with debugging (`-d`) if
> there's nothing being logged about populating /proc/cpuinfo.
> 
>   I should have time this weekend when I can spin up a qemu vm to test
> in, if we're not able to get a root cause identified before then.
> 
> Mathias
I can probably grant you privileges on abel as soon as I get an ack from my fellow DSA mates.

-- 
Pierre-Elliott Bécue