linux-kernel - Re: [ANNOUNCE] v5.14-rc4-rt4

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Date:   Wed, 4 Aug 2021 10:24:18 +0200
From:   Daniel Wagner <wagi@...om.org>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-rt-users@...r.kernel.org,
        Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [ANNOUNCE] v5.14-rc4-rt4

Hi Sebastian,

On Mon, Aug 02, 2021 at 06:27:50PM +0200, Sebastian Andrzej Siewior wrote:
> Dear RT folks!
> 
> I'm pleased to announce the v5.14-rc4-rt4 patch set. 

stress-ng is able to trigger a BUG on my old x86_64 box very
easy. Unfortunately, there is not much in the logs though.

+ ./cyclictest.sh -D 15m -p 98 -i 1000 -t 2 -a 0-1 -h 100 -w 'stress-ng --class io --all 1'
# /dev/cpu_dma_latency set to 0us
[   21.059000] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:35
[   21.059008] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 321, name: iou-wrk-314
[   21.059010] Preemption disabled at:
[   21.059011] [<ffffffffa5223ce7>] schedule+0xa7/0xf0
[   23.076059] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:35
[   23.076064] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 324, name: iou-wrk-314
[   23.076066] Preemption disabled at:
[   23.076067] [<ffffffffa5223ce7>] schedule+0xa7/0xf0
[   37.416490] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:35
[   37.416495] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 369, name: iou-wrk-314
[   37.416498] Preemption disabled at:
[   37.416498] [<ffffffffa5223ce7>] schedule+0xa7/0xf0
[   38.416858] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:35
[   38.416863] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 411, name: iou-wrk-314
[   38.416864] Preemption disabled at:
[   38.416865] [<ffffffffa5223ce7>] schedule+0xa7/0xf0
[   43.486360] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:35
[   43.486366] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 414, name: iou-wrk-314
[   43.486368] Preemption disabled at:
[   43.486369] [<ffffffffa5223ce7>] schedule+0xa7/0xf0

Thanks,
Daniel