linux-kernel - Re: [git pull] drm for 6.8

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Message-ID: <2faccc1a-7fdd-499b-aa0a-bd54f4068f3e@suse.cz>
Date: Wed, 24 Jan 2024 16:01:40 +0100
From: Vlastimil Babka <vbabka@...e.cz>
To: Dave Airlie <airlied@...il.com>,
 Linus Torvalds <torvalds@...ux-foundation.org>,
 Daniel Vetter <daniel.vetter@...ll.ch>
Cc: dri-devel <dri-devel@...ts.freedesktop.org>,
 LKML <linux-kernel@...r.kernel.org>,
 Linux regressions mailing list <regressions@...ts.linux.dev>
Subject: Re: [git pull] drm for 6.8

On 1/10/24 20:49, Dave Airlie wrote:
> Hi Linus,
> 
> This is the main drm pull request for 6.8.

When testing the rc1 on my openSUSE Tumbleweed desktop, I've started
experiencing "frozen desktop" (KDE/Wayland) issues. The symptoms are that
everything freezes including mouse cursor. After a while it either resolves,
or e.g. firefox crashes (if it was actively used when it froze) or it's
frozen for too long and I reboot with alt-sysrq-b. When it's frozen I can
still ssh to the machine, and there's nothing happening in dmesg.
The machine is based on Amd Ryzen 7 2700 and Radeon RX7600.

I've bisected the merge commits so far and now will try to dig into this
one. I've noticed there was also a drm fixes PR later in the merge window but
since it was also merged into rc1 and thus didn't prevent the issue for me,
I guess it's not relevant here?

Because the reproduction wasn't very deterministic I considered a commit bad
even if it didn't lead to completely frozen desktop and a forced reboot.
Even the multi-second hangs that resolved were a regression compared to 6.7
anyway.

If there are known issues and perhaps candidate fixes already, please do tell.

Thanks,
Vlastimil

git bisect start '--first-parent'
# status: waiting for both good and bad commits
# bad: [6613476e225e090cc9aad49be7fa504e290dd33d] Linux 6.8-rc1
git bisect bad 6613476e225e090cc9aad49be7fa504e290dd33d
# status: waiting for good commit(s), bad commit known
# good: [0dd3ee31125508cd67f7e7172247f05b7fd1753a] Linux 6.7
git bisect good 0dd3ee31125508cd67f7e7172247f05b7fd1753a
# bad: [b4442cadca2f97239c8b80f64af7937897b867b1] Merge tag 'x86_tdx_for_6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad b4442cadca2f97239c8b80f64af7937897b867b1
# bad: [c4c6044d35f06a93115e691e79436839962c203e] Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
git bisect bad c4c6044d35f06a93115e691e79436839962c203e
# bad: [42bff4d0f9b9c8b669c5cef25c5116f41eb45c6b] Merge tag 'pwm/for-6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
git bisect bad 42bff4d0f9b9c8b669c5cef25c5116f41eb45c6b
# good: [32720aca900b226653c843bb4e06b8125312f214] Merge tag 'fsnotify_for_v6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
git bisect good 32720aca900b226653c843bb4e06b8125312f214
# good: [5bad490858c3ebdbb47e622e8f9049f828d2abba] Merge tag 'soc-defconfig-6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
git bisect good 5bad490858c3ebdbb47e622e8f9049f828d2abba
# good: [70d201a40823acba23899342d62bc2644051ad2e] Merge tag 'f2fs-for-6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
git bisect good 70d201a40823acba23899342d62bc2644051ad2e
# bad: [141d9c6e003b806d8faeddeec7053ee2691ea61a] Merge tag 'firewire-updates-6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394
git bisect bad 141d9c6e003b806d8faeddeec7053ee2691ea61a
# bad: [61f4c3e6711477b8a347ca5fe89e5e6613e0a147] Merge tag 'linux-watchdog-6.8-rc1' of git://www.linux-watchdog.org/linux-watchdog
git bisect bad 61f4c3e6711477b8a347ca5fe89e5e6613e0a147
# bad: [7912a6391f3ee7eb9f9a69227a209d502679bc0c] Merge tag 'sound-6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
git bisect bad 7912a6391f3ee7eb9f9a69227a209d502679bc0c
# bad: [cf65598d5909acf5e7b7dc9e21786e386356bc81] Merge tag 'drm-next-2024-01-10' of git://anongit.freedesktop.org/drm/drm
git bisect bad cf65598d5909acf5e7b7dc9e21786e386356bc81
# first bad commit: [cf65598d5909acf5e7b7dc9e21786e386356bc81] Merge tag 'drm-next-2024-01-10' of git://anongit.freedesktop.org/drm/drm