From: Thomas Gleixner <tglx@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: "Jiri Slaby" <jirislaby@kernel.org>,
"Matthieu Baerts" <matttbe@kernel.org>,
"Stefan Hajnoczi" <stefanha@redhat.com>,
"Stefano Garzarella" <sgarzare@redhat.com>,
kvm@vger.kernel.org, virtualization@lists.linux.dev,
Netdev <netdev@vger.kernel.org>,
rcu@vger.kernel.org, "MPTCP Linux" <mptcp@lists.linux.dev>,
"Linux Kernel" <linux-kernel@vger.kernel.org>,
"Shinichiro Kawasaki" <shinichiro.kawasaki@wdc.com>,
"Paul E. McKenney" <paulmck@kernel.org>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
"luto@kernel.org" <luto@kernel.org>,
"Michal Koutný" <MKoutny@suse.com>,
"Waiman Long" <longman@redhat.com>,
"Marco Elver" <elver@google.com>
Subject: Re: Stalls when starting a VSOCK listening socket: soft lockups, RCU stalls, timeout
Date: Sun, 08 Mar 2026 17:58:22 +0100 [thread overview]
Message-ID: <87v7f61cnl.ffs@tglx> (raw)
In-Reply-To: <87eclu3coa.ffs@tglx>
On Sun, Mar 08 2026 at 10:15, Thomas Gleixner wrote:
> On Sat, Mar 07 2026 at 23:29, Thomas Gleixner wrote:
>> I'll look at it more tomorrow in the hope that this rested brain
>> approach works out again.
>
> There is another one of the same category. Combo patch below.
This rested brain thing is clearly a myth. The patch actually solves
nothing because the code ensures that the TRANSIT bit is never set
together with the ONCPU bit.
One of those moments where you just hope that the earth opens up and
swallows you.
So I'm back to square one. I go and do what I should have done in the
first place. Write a debug patch with trace_printks and let the people
who can actually trigger the problem run with it.
next prev parent reply other threads:[~2026-03-08 16:58 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-06 11:54 Stalls when starting a VSOCK listening socket: soft lockups, RCU stalls, timeout Matthieu Baerts
2026-02-06 16:38 ` Stefano Garzarella
2026-02-06 17:13 ` Matthieu Baerts
2026-02-26 10:37 ` Jiri Slaby
2026-03-02 5:28 ` Jiri Slaby
2026-03-02 11:46 ` Peter Zijlstra
2026-03-02 14:30 ` Waiman Long
2026-03-05 7:00 ` Jiri Slaby
2026-03-05 11:53 ` Jiri Slaby
2026-03-05 12:20 ` Jiri Slaby
2026-03-05 16:16 ` Thomas Gleixner
2026-03-05 17:33 ` Jiri Slaby
2026-03-05 19:25 ` Thomas Gleixner
2026-03-06 5:48 ` Jiri Slaby
2026-03-06 9:57 ` Thomas Gleixner
2026-03-06 10:16 ` Jiri Slaby
2026-03-06 16:28 ` Thomas Gleixner
2026-03-06 11:06 ` Matthieu Baerts
2026-03-06 16:57 ` Matthieu Baerts
2026-03-06 18:31 ` Jiri Slaby
2026-03-06 18:44 ` Matthieu Baerts
2026-03-06 21:40 ` Matthieu Baerts
2026-03-06 15:24 ` Peter Zijlstra
2026-03-07 9:01 ` Thomas Gleixner
2026-03-07 22:29 ` Thomas Gleixner
2026-03-08 9:15 ` Thomas Gleixner
2026-03-08 16:55 ` Jiri Slaby
2026-03-08 16:58 ` Thomas Gleixner [this message]
2026-03-08 17:23 ` Matthieu Baerts
2026-03-09 8:43 ` Thomas Gleixner
2026-03-09 12:23 ` Matthieu Baerts
2026-03-10 8:09 ` Thomas Gleixner
2026-03-10 8:20 ` Thomas Gleixner
2026-03-10 8:56 ` Jiri Slaby
2026-03-10 9:00 ` Jiri Slaby
2026-03-10 10:03 ` Thomas Gleixner
2026-03-10 10:06 ` Thomas Gleixner
2026-03-10 11:24 ` Matthieu Baerts
2026-03-10 11:54 ` Peter Zijlstra
2026-03-10 12:28 ` Thomas Gleixner
2026-03-10 13:40 ` Matthieu Baerts
2026-03-10 13:47 ` Thomas Gleixner
2026-03-10 15:51 ` Matthieu Baerts
2026-03-03 13:23 ` Matthieu Baerts
2026-03-05 6:46 ` Jiri Slaby
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