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Message-ID: <20251001133037.0ab6952c@kernel.org>
Date: Wed, 1 Oct 2025 13:30:37 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Willem de Bruijn <willemb@...gle.com>
Cc: Kuniyuki Iwashima <kuniyu@...gle.com>, edumazet@...gle.com,
fw@...len.de, netdev@...r.kernel.org, pabeni@...hat.com
Subject: Re: deadlocks on pernet_ops_rwsem
On Wed, 1 Oct 2025 15:33:56 -0400 Willem de Bruijn wrote:
> > > Was there any update on packages (especially qemu?) used by
> > > CI around 2025-09-18 ?
> >
> > No updates according to the logs. First hit was on Thursday so I thought
> > maybe it came from Linus. But looking at the branches we fast forwarded
> > 2025-09-18--21-00 and there were 2 hits earlier that day (2025-09-18--03-00,
> > 2025-09-18--15-00)
>
> Is there a good SHA1 around the time of the earliest report?
>
> There do not seem to be any recent changes to rwsem, let alone
> specifically to pernet_ops_rwsem.
The first time it triggered when net-next was at 152ba35c04ad
and net at 09847108971a, CI branch contents:
https://netdev.bots.linux.dev/static/nipa/branch_deltas/net-next-2025-09-18--03-00.html
The previous one (so the branch before the first time it triggered)
had base commits of 6b957c0a36f5 09847108971a.
If you click on the link above you can go back / forward in the branch
contents.
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