linux-kernel - Re: [REGRESSION] Long boot times due to USB enumeration

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Message-ID: <CAMpRfLOmXBFatrp-tuYF=XeruyDLUE=Dk=yxx7N_nHP7NsQ5jA@mail.gmail.com>
Date: Sat, 8 Mar 2025 17:06:29 +0800
From: Seïfane Idouchach <seifane53@...il.com>
To: Greg KH <gregkh@...uxfoundation.org>
Cc: dirk.behme@...bosch.com, rafael@...nel.org, dakr@...nel.org, 
	linux-kernel@...r.kernel.org, regressions@...ts.linux.dev, 
	stable@...r.kernel.org
Subject: Re: [REGRESSION] Long boot times due to USB enumeration

Some development here,

I noticed today that while applying Dan's patch and reverting the
"bad" commit resolves the issue, it only does so on a reboot. The boot
is still slow on a cold boot.
As you said this might very well be a mix of different issues. It is
my own fault for not reporting this regression earlier thinking it
would be fixed.

As a sanity check I retested old LTS releases. I find that v6.1 does
not have the issue on cold boot while v6.6 does. The USB error
messages are there regardless, they just don't impede on the boot
process time.
I am almost 90% positive that those error messages have always been
present on this system, for what it's worth.
I have gone through the troubleshooting step of unplugging all USB
devices and headers and the errors are still present.

If I find the time I might run another bisect between v6.1 and v6.6
doing cold boots instead of reboots and report back. I am just afraid
I will just get back to the initial commit reported since this is what
I first did.

Thank you.