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From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Tue, 12 Mar 2024 14:44:14 -0700
Message-ID: <CAHk-=wgP=9JxdOJ5oYtVO5yM6pFi5+3FPxfCQa4ezpagJuXq3g@mail.gmail.com>
Subject: Re: Unexplained long boot delays [Was Re: [GIT PULL] RCU changes for v6.9]
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: Boqun Feng <boqun.feng@gmail.com>, linux-kernel@vger.kernel.org, 
	kernel-team@meta.com, paulmck@kernel.org, mingo@kernel.org, 
	tglx@linutronix.de, rcu@vger.kernel.org, joel@joelfernandes.org, 
	neeraj.upadhyay@amd.com, urezki@gmail.com, qiang.zhang1211@gmail.com, 
	frederic@kernel.org, bigeasy@linutronix.de, anna-maria@linutronix.de, 
	chenzhongjin@huawei.com, yangjihong1@huawei.com, rostedt@goodmis.org
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On Tue, 12 Mar 2024 at 14:34, Florian Fainelli <f.fainelli@gmail.com> wrote:
>
> and here is a log where this fails:
>
> https://gist.github.com/ffainelli/ed08a2b3e853f59343786ebd20364fc8

You could try the 'initcall_debug' kernel command line.

It will make the above *much* noisier, but it might - thanks to all
the new noise - show exactly *what* is being crazy slow to initialize.

Because right now it's just radio silence in between those

  [    1.926435] bcmgenet f0480000.ethernet: GENET 5.0 EPHY: 0x0000
  [  162.148135] unimac-mdio unimac-mdio.0: Broadcom UniMAC MDIO bus

things, and that's presumably because some random initcall there just
takes forever to time out.

             Linus