linux-kernel - Fwd: Slow boot and shutdown/reboot problems with 6.5.0+

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Message-ID: <5011708f-b0ae-2853-0f87-a3b59845a2cc@gmail.com>
Date:   Thu, 7 Sep 2023 20:25:04 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Peter Huewe <peterhuewe@....de>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Russ Weight <russell.h.weight@...el.com>,
        Marcus Seyfarth <m.seyfarth@...il.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Regressions <regressions@...ts.linux.dev>,
        Linux Integrity <linux-integrity@...r.kernel.org>
Subject: Fwd: Slow boot and shutdown/reboot problems with 6.5.0+

Hi,

I notice a regression report on Bugzilla [1]. Quoting from it:

> I've observed a slow boot and shutdown/reboot problems that have been verified on the stock Arch 6.5.1, CachyOS 6.5.0-2 and a custom-compiled 6.5.1 Kernel. I originally had seen a RCU-related trace which I thought to be the cause for these problems as well and reported it in https://bugzilla.kernel.org/show_bug.cgi?id=217864. However that specific trace turned out to be caused by an old patch that I carried around with me since 2022.
> 
> systemd-analyze with my custom compiled 6.5.1 shows a suspiciously long firmware time:
> Startup finished in 2min 42.000s (firmware) + 4.201s (loader) + 6.895s (kernel) + 1.541s (userspace) = 2min 54.640s  
> graphical.target reached after 1.539s in userspace.
> 
> For comparison, 6.4.14 starts in 16 seconds and doesn't even show a firmware section.
> 
> System:
>   Host: klx99 Kernel: 6.5.1-3.1-cachyos-lto arch: x86_64 bits: 64
>     Desktop: KDE Plasma v: 5.27.7 Distro: CachyOS
> Machine:
>   Mobo: Lenovo model: X99-TF Gaming v: G368J V1.1, NALEX
>     serial: <superuser required> UEFI: American Megatrends v: CX99DE26
>     date: 10/10/2020
> CPU:
>   Info: 18-core model: Intel Xeon E5-2696 v3 bits: 64 type: MT MCP cache:
>     L2: 4.5 MiB
> Graphics:
>   Device-1: AMD Navi 21 [Radeon RX 6950 XT] driver: amdgpu v: kernel
>   Display: x11 server: X.Org v: 21.1.99 with: Xwayland v: 23.2.0 driver: X:
>     loaded: amdgpu unloaded: modesetting dri: radeonsi gpu: amdgpu
>     resolution: 2560x1440~165Hz
>   API: OpenGL v: 4.6 Mesa 23.3.0-devel (git-8a32614a18) renderer: AMD
>     Radeon RX 6950 XT (navi21 LLVM 16.0.6 DRM 3.54 6.5.1-3.1-cachyos-lto)

See Bugzilla for the full thread.

FYI, it seems like this regression is related to systemd boot loop
reported earlier [2].

To Marcus: On Bugzilla, Artem had asked you to bisect. Do you have
any conclusion on it?

Anyway, I'm adding this regression to be tracked by regzbot:

#regzbot introduced: v6.4..v6.5 https://bugzilla.kernel.org/show_bug.cgi?id=217874
#regzbot title: slow boot possibly due to firmware (TPM?) issues

Thanks.

[1]: https://bugzilla.kernel.org/show_bug.cgi?id=217874
[2]: https://lore.kernel.org/all/028a21df-4397-80aa-c2a5-7c754560f595@gmail.com/

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