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f55a9b59e8
Running a PREEMPT_RT kernel based on v5.19-rc3-rt4 on an Ampere Altra
triggers:
[ 22.616229] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:46
[ 22.616239] in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 1884, name: kworker/80:1
[ 22.616243] preempt_count: 3, expected: 0
[ 22.616244] RCU nest depth: 0, expected: 0
[...]
[ 22.616250] hardirqs last enabled at (33): _raw_spin_unlock_irq (/home/piegon01/linux/./arch/arm64/include/asm/irqflags.h:35)
[ 22.616273] hardirqs last disabled at (34): __schedule (/home/piegon01/linux/kernel/sched/core.c:6432 (discriminator 1))
[ 22.616283] softirqs last enabled at (0): copy_process (/home/piegon01/linux/./include/linux/lockdep.h:191)
[ 22.616297] softirqs last disabled at (0): 0x0
[ 22.616305] Preemption disabled at:
[ 22.616307] __setup_irq (/home/piegon01/linux/kernel/irq/manage.c:1612)
[ 22.616322] CPU: 80 PID: 1884 Comm: kworker/80:1 Tainted: G W [...]
[ 22.616328] Hardware name: WIWYNN Mt.Jade Server System B81.03001.0005/Mt.Jade Motherboard, BIOS 1.08.20220218 (SCP: 1.08.20220218) 2022/02/18
[ 22.616333] Workqueue: events work_for_cpu_fn
[ 22.616344] Call trace:
[...]
[ 22.616403] alloc_cpumask_var_node (/home/piegon01/linux/lib/cpumask.c:115)
[ 22.616414] alloc_cpumask_var (/home/piegon01/linux/lib/cpumask.c:147)
[ 22.616417] its_select_cpu (/home/piegon01/linux/drivers/irqchip/irq-gic-v3-its.c:1580)
[ 22.616428] its_set_affinity (/home/piegon01/linux/drivers/irqchip/irq-gic-v3-its.c:1659)
[ 22.616431] msi_domain_set_affinity (/home/piegon01/linux/kernel/irq/msi.c:501)
[ 22.616440] irq_do_set_affinity (/home/piegon01/linux/kernel/irq/manage.c:276)
[ 22.616443] irq_setup_affinity (/home/piegon01/linux/kernel/irq/manage.c:633)
[ 22.616447] irq_startup (/home/piegon01/linux/kernel/irq/chip.c:280)
[ 22.616453] __setup_irq (/home/piegon01/linux/kernel/irq/manage.c:1777)
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.