linux-kernel - Re: Unexplained long boot delays [Was Re: [GIT PULL] RCU changes for v6.9]

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Date: Thu, 14 Mar 2024 10:11:37 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: Florian Fainelli <f.fainelli@...il.com>, Frederic Weisbecker
 <frederic@...nel.org>
Cc: "Russell King (Oracle)" <linux@...linux.org.uk>, Joel Fernandes
 <joel@...lfernandes.org>, Boqun Feng <boqun.feng@...il.com>, Anna-Maria
 Behnsen <anna-maria@...utronix.de>, Linus Torvalds
 <torvalds@...ux-foundation.org>, linux-kernel@...r.kernel.org,
 kernel-team@...a.com, paulmck@...nel.org, mingo@...nel.org,
 rcu@...r.kernel.org, neeraj.upadhyay@....com, urezki@...il.com,
 qiang.zhang1211@...il.com, bigeasy@...utronix.de, chenzhongjin@...wei.com,
 yangjihong1@...wei.com, rostedt@...dmis.org, Justin Chen
 <justin.chen@...adcom.com>
Subject: Re: Unexplained long boot delays [Was Re: [GIT PULL] RCU changes
 for v6.9]

On Wed, Mar 13 2024 at 20:44, Florian Fainelli wrote:
> On 3/13/2024 3:52 PM, Frederic Weisbecker wrote:
>> Can you please boot with:
>> 
>>      trace_event=timer_migration,timer_start,timer_expire_entry,timer_cancel
>> 
>> And add the following and give us the resulting output in dmesg?
>
> Here are two logs from two different systems that exposed the problem on 
> boot:
>
> https://gist.github.com/ffainelli/f0834c52ef6320c9216d879ca29a4b81
> https://gist.github.com/ffainelli/dc838883edb925a77d8eb34c0fe95be0

[    0.003042] Failed to enable trace event: timer_migration

The event option should be:

      trace_event=timer_migration:*,timer_start,timer_expire_entry,timer_cancel

Thanks,

        tglx