next/master bisection: baseline.login on rk3328-rock64

[Maxime Ripard]

Hi Mark,

On Mon, Oct 10, 2022 at 01:17:15PM +0100, Mark Brown wrote:
> On Fri, Oct 07, 2022 at 02:10:11PM -0700, KernelCI bot wrote:
> 
> The KernelCI bisection bot found a boot problem on today's -next 
> on rk3328-rock64 with a defconfig plus debug fragments triggered by
> cb1b1dd96241f ("clk: Set req_rate on reparenting").  The log doesn't
> show any obvious warnings but simply stalls out after:
> 
> [  258.676722][    T1] pps_core: LinuxPPS API ver. 1 registered
> [  258.684929][    T1] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti at linux.it>
> [  258.788655][    T1] PTP clock support registered
> [  259.246358][    T1] EDAC MC: Ver: 3.0.0
> 
> It seems like the performance of the system has been dramatically
> reduced, current mainline boots with the same kernel config show we're
> reaching that point after only 5s:
> 
> [    5.577047][    T1] PTP clock support registered
> [    5.585556][    T1] EDAC MC: Ver: 3.0.0
> 
> and getting to a prompt after a bit over a minute which is much more
> viable.

Thanks for the report

It might be related to https://lore.kernel.org/linux-clk/0acc7217-762c-7c0d-45a0-55c384824ce4@samsung.com/

I've sent a series that might address this issue:
https://lore.kernel.org/linux-clk/20221010-rpi-clk-fixes-again-v1-0-d87ba82ac404@cerno.tech/

Let me know if it fixes things for you

Maxime
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