On Thu, 27 Nov 2025, "Borah, Chaitanya Kumar" <[email protected]>
wrote:
> Hello Christian,
>
> This is Chaitanya (again!).
>
> This mail is regarding another regression we are seeing in our CI
> runs[1] on drm-tip (with both xe and i915).
Referring to drm-tip is downplaying the problem. The bisected regression
is in v6.18 release. It's breaking suspend/resume across a lot of
platforms on two drivers, i915 and xe.
a3f8f8662771 ("power: always freeze efivarfs")
As far as regressions go, it's pretty bad. Please prioritize.
BR,
Jani.
>
> `````````````````````````````````````````````````````````````````````````````````
> <4> [157.687644] ------------[ cut here ]------------
> <4> [157.687768] WARNING: CPU: 5 PID: 2277 at kernel/freezer.c:139
> __set_task_frozen+0x7f/0xb0
> ...
> <4> [157.687923] PKRU: 55555554
> <4> [157.687924] Call Trace:
> <4> [157.687925] <TASK>
> <4> [157.687926] ? __pfx___set_task_frozen+0x10/0x10
> <4> [157.687929] task_call_func+0x6d/0x120
> <4> [157.687932] ? cgroup_freezing+0x89/0x200
> <4> [157.687937] freeze_task+0x98/0x100
> <4> [157.687940] try_to_freeze_tasks+0xd2/0x440
> <4> [157.687946] freeze_processes+0x56/0xd0
> <4> [157.687948] hibernate+0x129/0x4a0
> <4> [157.687951] state_store+0xd3/0xe0
> <4> [157.687954] kobj_attr_store+0x12/0x40
> <4> [157.687959] sysfs_kf_write+0x4d/0x80
> <4> [157.687963] kernfs_fop_write_iter+0x188/0x240
> <4> [157.687967] vfs_write+0x283/0x540
> <4> [157.687969] ? free_to_partial_list+0x46d/0x640
> <4> [157.687976] ksys_write+0x6f/0xf0
> <4> [157.687980] __x64_sys_write+0x19/0x30
> <4> [157.687982] x64_sys_call+0x79/0x26a0
> <4> [157.687984] do_syscall_64+0x93/0xd60
> <4> [157.687987] ? putname+0x65/0x90
> <4> [157.687990] ? kmem_cache_free+0x553/0x680
> <4> [157.687995] ? putname+0x65/0x90
> <4> [157.687997] ? putname+0x65/0x90
> <4> [157.687999] ? do_sys_openat2+0x8b/0xd0
> <4> [157.688003] ? __x64_sys_openat+0x54/0xa0
> <4> [157.688007] ? do_syscall_64+0x1b7/0xd60
> <4> [157.688009] ? __fput+0x1bf/0x2f0
> <4> [157.688012] ? fput_close_sync+0x3d/0xa0
> <4> [157.688015] ? __x64_sys_close+0x3e/0x90
> <4> [157.688017] ? do_syscall_64+0x1b7/0xd60
> <4> [157.688019] ? putname+0x65/0x90
> <4> [157.688021] ? putname+0x65/0x90
> <4> [157.688023] ? do_sys_openat2+0x8b/0xd0
> <4> [157.688024] ? __fput+0x1bf/0x2f0
> <4> [157.688028] ? __x64_sys_openat+0x54/0xa0
> <4> [157.688032] ? do_syscall_64+0x1b7/0xd60
> <4> [157.688034] ? do_syscall_64+0x1b7/0xd60
> <4> [157.688036] ? irqentry_exit+0x77/0xb0
> <4> [157.688038] ? exc_page_fault+0xbd/0x2c0
> <4> [157.688042] entry_SYSCALL_64_after_hwframe+0x76/0x7e
> <4> [157.688044] RIP: 0033:0x72523c91c574
> `````````````````````````````````````````````````````````````````````````````````
> Details log can be found in [2].
>
> After bisecting the tree, the following patch [3] seems to be the first
> "bad" commit
>
> `````````````````````````````````````````````````````````````````````````````````````````````````````````
> commit a3f8f8662771285511ae26c4c8d3ba1cd22159b9
> Author: Christian Brauner <[email protected]>
> Date: Wed Nov 5 14:39:45 2025 +0100
>
> power: always freeze efivarfs
> `````````````````````````````````````````````````````````````````````````````````````````````````````````
>
> We also verified that if we revert the patch the issue is not seen.
>
> Could you please check why the patch causes this regression and provide
> a fix if necessary?
>
> Thank you.
>
> Regards
>
> Chaitanya
>
> [1]
> https://intel-gfx-ci.01.org/tree/drm-tip/index.html?testfilter=suspend
> [2]
> https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_17595/shard-mtlp-6/igt@[email protected]
> [3]
> https://gitlab.com/freedesktop-mirror/drm-tip/-/commit/a3f8f8662771285511ae26c4c8d3ba1cd22159b9
--
Jani Nikula, Intel
