From: Stephen Berman <stephen.berman@gmx.net>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org
Subject: Re: power-off delay/hang due to commit 6d25be57 (mainline)
Date: Tue, 16 Jun 2020 10:13:27 +0200 [thread overview]
Message-ID: <87o8pjh1i0.fsf@gmx.net> (raw)
In-Reply-To: <20200616073827.vysntufld3ves666@linutronix.de> (Sebastian Andrzej Siewior's message of "Tue, 16 Jun 2020 09:38:27 +0200")
[-- Attachment #1: Type: text/plain, Size: 1296 bytes --]
On Tue, 16 Jun 2020 09:38:27 +0200 Sebastian Andrzej Siewior <bigeasy@linutronix.de> wrote:
> On 2020-06-16 09:14:37 [+0200], Stephen Berman wrote:
>>
>> I set CONFIG_ACPI_DEBUG=y, applied the patch and rebuilt 5.6.4, but:
>>
>> $ cat /sys/kernel/debug/tracing/trace > trace.txt
>> cat: /sys/kernel/debug/tracing/trace: No such file or directory
>>
>> Here are all the 5.6.4 config options with "TRACING" or "TRACE"; do I
>> need to set any that aren't set?
>
> I see that "Kernel hacking ---> Tracers" is enabled. You should have
> one tracer enabled for that trace_printk() to work. You have context
> switch tracer so it should be enough.
>
> You might need CONFIG_DEBUG_FS (but it is set in your 5.1 config) or it
> is just not mounted. So I have here:
>
> | debugfs on /sys/kernel/debug type debugfs (rw,nosuid,nodev,noexec,relatime)
> | tracefs on /sys/kernel/debug/tracing type tracefs (rw,nosuid,nodev,noexec,relatime)
>
> Does it work for you if you mount it?
# mount -t debugfs debugfs /sys/kernel/debug
# mount -t tracefs tracefs /sys/kernel/debug/tracing
# mount
...
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
tracefs on /sys/kernel/debug/tracing type tracefs (rw,relatime)
Yes, thanks, that did it. Trace attached.
Steve Berman
[-- Attachment #2: trace.txt.gz --]
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next prev parent reply other threads:[~2020-06-16 8:13 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <87v9l65d2y.fsf@gmx.net>
[not found] ` <20200513220428.4nksinis2qs5dtmh@linutronix.de>
[not found] ` <87mu6aurfn.fsf@gmx.net>
[not found] ` <20200522164012.ynyvrjompv42jtmx@linutronix.de>
[not found] ` <87y2owwo2o.fsf@rub.de>
[not found] ` <20200609202339.cgy57twm2zdtjhje@linutronix.de>
[not found] ` <87tuzjcovq.fsf@gmx.net>
[not found] ` <20200610102514.4vdzu5u7d6vnpicn@linutronix.de>
[not found] ` <87imfyh6yx.fsf@gmx.net>
[not found] ` <87wo4dligz.fsf@gmx.net>
2020-06-12 11:01 ` power-off delay/hang due to commit 6d25be57 (mainline) Sebastian Andrzej Siewior
2020-06-14 12:12 ` Stephen Berman
2020-06-14 17:10 ` Sebastian Andrzej Siewior
2020-06-15 7:58 ` Stephen Berman
2020-06-15 14:51 ` Sebastian Andrzej Siewior
2020-06-15 15:41 ` Stephen Berman
2020-06-15 15:58 ` Sebastian Andrzej Siewior
2020-06-15 16:19 ` Stephen Berman
2020-06-15 16:32 ` Sebastian Andrzej Siewior
2020-06-16 7:14 ` Stephen Berman
2020-06-16 7:38 ` Sebastian Andrzej Siewior
2020-06-16 8:13 ` Stephen Berman [this message]
2020-06-16 15:55 ` Sebastian Andrzej Siewior
2020-06-16 20:28 ` Stephen Berman
2020-06-17 14:27 ` Sebastian Andrzej Siewior
2020-06-17 21:09 ` Stephen Berman
2020-06-24 20:11 ` Sebastian Andrzej Siewior
2020-06-24 21:49 ` Stephen Berman
2020-07-14 13:44 ` Sebastian Andrzej Siewior
2020-07-14 13:54 ` Rafael J. Wysocki
2020-07-14 14:11 ` Sebastian Andrzej Siewior
2020-07-14 15:53 ` Rafael J. Wysocki
2020-07-14 16:10 ` Sebastian Andrzej Siewior
2020-08-11 10:27 ` Sebastian Andrzej Siewior
2020-08-11 14:02 ` Rafael J. Wysocki
2020-07-19 10:07 ` Stephen Berman
2020-08-11 11:58 ` Stephen Berman
2020-08-11 13:29 ` Sebastian Andrzej Siewior
2020-08-11 14:34 ` Rafael J. Wysocki
2020-08-11 15:25 ` Sebastian Andrzej Siewior
[not found] ` <87ft8tayic.fsf@gmx.net>
2020-08-11 18:49 ` Sebastian Andrzej Siewior
2020-10-06 21:49 ` Sebastian Andrzej Siewior
2020-10-07 16:18 ` Rafael J. Wysocki
2020-10-26 17:20 ` Sebastian Andrzej Siewior
2020-12-02 18:03 ` Sebastian Andrzej Siewior
2020-12-02 18:31 ` Rafael J. Wysocki
2020-12-02 19:13 ` Rafael J. Wysocki
2020-12-31 20:46 ` Rafael J. Wysocki
2021-01-02 11:03 ` Rafael J. Wysocki
2021-01-04 15:38 ` Stephen Berman
2021-01-24 13:49 ` Stephen Berman
2021-01-25 16:25 ` Rafael J. Wysocki
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