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Message-ID: <20250730141643.RD-uucXa@linutronix.de>
Date: Wed, 30 Jul 2025 16:16:43 +0200
From: Nam Cao <namcao@...utronix.de>
To: Gabriele Monaco <gmonaco@...hat.com>
Cc: linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
linux-trace-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
Ingo Molnar <mingo@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Tomas Glozar <tglozar@...hat.com>, Juri Lelli <jlelli@...hat.com>,
Clark Williams <williams@...hat.com>,
John Kacur <jkacur@...hat.com>
Subject: Re: [PATCH v5 7/9] rv: Replace tss and sncid monitors with more
complete sts
On Wed, Jul 30, 2025 at 02:52:25PM +0200, Nam Cao wrote:
> I do not have trace-cmd in the riscv image, but I do have perf. I will give
> it a try.
Instead, I replaced with tracepoints with trace_printk() and managed to
captured the log moments before disaster below.
I'm not sure what I'm seeing, just dumping this here, maybe you have an
idea.
Quite interesting that the last "normal" line for cpu1 is:
test-762 [001] dn... 112.407548: da_event_sts: cant_sched x irq_enable -> can_sched (final)
But in the next error line, it mentions the "enable_to_exit". Where did
this state come from??
<...>-1621 [001] d.... 119.919846: da_event_sts: rv: monitor sts does not allow event sched_switch on state enable_to_exit
Something very strange is going on here..
Nam
test-1198 [000] d.... 112.407332: da_event_sts: cant_sched x irq_enable -> can_sched (final)
test-762 [001] d.... 112.407338: da_event_sts: can_sched x irq_disable -> cant_sched
test-762 [001] d.... 112.407347: da_event_sts: cant_sched x irq_enable -> can_sched (final)
test-1198 [000] d.... 112.407351: da_event_sts: can_sched x irq_disable -> cant_sched
test-762 [001] d.... 112.407363: da_event_sts: can_sched x irq_disable -> cant_sched
test-1198 [000] d.h.. 112.407370: da_event_sts: cant_sched x irq_entry -> cant_sched
test-762 [001] d.h.. 112.407383: da_event_sts: cant_sched x irq_entry -> cant_sched
test-637 [002] dn... 112.407413: da_event_sts: cant_sched x irq_enable -> can_sched (final)
illegal-1091 [003] dns.. 112.407418: da_event_sts: in_irq x irq_enable -> scheduling
test-637 [002] .n... 112.407424: da_event_sts: can_sched x schedule_entry -> scheduling
illegal-1091 [003] dns.. 112.407431: da_event_sts: scheduling x irq_disable -> disable_to_switch
test-637 [002] dn... 112.407433: da_event_sts: scheduling x irq_disable -> disable_to_switch
illegal-1091 [003] dns.. 112.407438: da_event_sts: disable_to_switch x irq_enable -> enable_to_exit
illegal-1091 [003] dns.. 112.407448: da_event_sts: enable_to_exit x irq_disable -> enable_to_exit
test-1198 [000] dns.. 112.407459: da_event_sts: cant_sched x irq_enable -> can_sched (final)
illegal-1091 [003] dns.. 112.407460: da_event_sts: enable_to_exit x irq_enable -> enable_to_exit
test-637 [002] d.... 112.407468: da_event_sts: disable_to_switch x sched_switch -> switching
test-1198 [000] dns.. 112.407472: da_event_sts: can_sched x irq_disable -> cant_sched
illegal-1091 [003] dns.. 112.407472: da_event_sts: enable_to_exit x irq_disable -> enable_to_exit
illegal-1091 [003] dn... 112.407481: da_event_sts: enable_to_exit x irq_enable -> enable_to_exit
test-1198 [000] dns.. 112.407483: da_event_sts: cant_sched x irq_enable -> can_sched (final)
test-762 [001] dns.. 112.407488: da_event_sts: cant_sched x irq_enable -> can_sched (final)
illegal-1091 [003] dn... 112.407492: da_event_sts: enable_to_exit x irq_disable -> enable_to_exit
test-1198 [000] dns.. 112.407493: da_event_sts: can_sched x irq_disable -> cant_sched
test-762 [001] dns.. 112.407501: da_event_sts: can_sched x irq_disable -> cant_sched
test-1198 [000] dns.. 112.407501: da_event_sts: cant_sched x irq_enable -> can_sched (final)
test-762 [001] dns.. 112.407508: da_event_sts: cant_sched x irq_enable -> can_sched (final)
test-1198 [000] dns.. 112.407513: da_event_sts: can_sched x irq_disable -> cant_sched
test-649 [002] d.... 112.407517: da_event_sts: switching x irq_enable -> enable_to_exit
test-762 [001] dns.. 112.407518: da_event_sts: can_sched x irq_disable -> cant_sched
test-1198 [000] dns.. 112.407521: da_event_sts: cant_sched x irq_enable -> can_sched (final)
test-762 [001] dns.. 112.407529: da_event_sts: cant_sched x irq_enable -> can_sched (final)
test-649 [002] ..... 112.407530: da_event_sts: enable_to_exit x schedule_exit -> can_sched (final)
test-1198 [000] dns.. 112.407541: da_event_sts: can_sched x irq_disable -> cant_sched
test-762 [001] dns.. 112.407541: da_event_sts: can_sched x irq_disable -> cant_sched
test-1198 [000] dns.. 112.407548: da_event_sts: cant_sched x irq_enable -> can_sched (final)
test-762 [001] dn... 112.407548: da_event_sts: cant_sched x irq_enable -> can_sched (final)
test-1198 [000] dns.. 112.407560: da_event_sts: can_sched x irq_disable -> cant_sched
test-1198 [000] dns.. 112.407567: da_event_sts: cant_sched x irq_enable -> can_sched (final)
test-1198 [000] dns.. 112.407578: da_event_sts: can_sched x irq_disable -> cant_sched
test-1198 [000] dns.. 112.407585: da_event_sts: cant_sched x irq_enable -> can_sched (final)
test-649 [002] d.... 112.407596: da_event_sts: can_sched x irq_disable -> cant_sched
illegal-1091 [003] d.... 112.410126: da_event_sts: rv: monitor sts does not allow event sched_switch on state enable_to_exit
<...>-1621 [001] d.... 119.919846: da_event_sts: rv: monitor sts does not allow event sched_switch on state enable_to_exit
test-642 [001] d.... 121.459650: da_event_sts: rv: monitor sts does not allow event sched_switch on state enable_to_exit
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