Bug#1052257: diffoscope crashes(?) comparing some i386 debs (and others)

[Vagrant Cascadian]

On 2023-09-27, Holger Levsen wrote:
> On Wed, Sep 20, 2023 at 12:25:36PM +0000, Holger Levsen wrote:
>> so I've powercycled the machine and also disabled the armhf workers now.
>> (under the (weak) assumption that this bug is mostly trigged when running
>> diffoscope on 32bit .debs...)

Most frustrating!


> so on Sep 23rd I made diffoscope run under ionice -n6, and so far the machine
> has gone down on its knees yet. 
>
> and on Sep 25th I said this on #debian-reproducible:
>
> when i made diffoscope run under ionice i was wondering if there were changes in the linux 
> scheduler causing the probs we saw... now not seeing the machine go down to its knees 
> within 60h uptime i'm saying this to "provoke" the problem coming back
> however, looking at 
> jenkins.debian.net/munin/static/dynazoom.html?cgiurl_graph=/munin-cgi/munin-cgi-graph&plugin_name=debian.net/jenkins.debian.net/uptime&size_x=800&size_y=400&start_epoch=1661108749&stop_epoch=1695668749
> I can that the highest uptime was 15 days..
> (since upgrading to bookworm which is when the probs started)
> it could also be kernel related, with switching to bookworm
> we switched from 5.10.0 to 6.1.0...
> so my next stabs c/would be: 
> a.) increase swap 
> b.) upgrade to kernel 6.4.0 from bpo
> c.) something else

Maybe try using a bullseye 5.10.x kernel for a while? Obviously better
if the issue is fixed in a newer kernel version ... but if 5.10.x
consistently works with bookworm userspace that ever so slightly narrows
down the issue?


live well,
  vagrant
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