FYI, we noticed the below changes on

git://people.freedesktop.org/~mlankhorst/linux rework-page-flip
commit 5c27c8ecb00ba97e70f6cf60ec7441cae57ff4e6 ("drm/i915: Rework intel_crtc_page_flip to be almost atomic.")


<5>[   21.020930] Key type id_legacy registered
<5>[   45.085787] random: nonblocking pool is initialized
<4>[  266.929645] ------------[ cut here ]------------
<4>[  266.930029] WARNING: CPU: 2 PID: 596 at drivers/gpu/drm/i915/intel_display.c:3931 intel_atomic_commit+0xf20/0xf30 [i915]()
<4>[  266.930769] Removing stuck page flip
<4>[  266.930992] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver netconsole x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel snd_hda_codec_hdmi snd_hda_codec_conexant snd_hda_codec_generic aesni_intel lrw gf128mul glue_helper ablk_helper cryptd i915 snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm pcspkr ahci libahci serio_raw uvcvideo snd_timer videobuf2_vmalloc videobuf2_v4l2 libata videobuf2_core videobuf2_memops v4l2_common snd soundcore videodev bcma drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm shpchp ideapad_laptop sparse_keymap wmi rfkill video
<4>[  266.935027] CPU: 2 PID: 596 Comm: kms_flip Not tainted 4.4.0-rc6-00758-g5c27c8e #1
<4>[  266.935481] Hardware name: LENOVO IdeaPad U410    /Lenovo          , BIOS 65CN15WW 06/05/2012
<4>[  266.935989]  ffffffffa03688e0 ffff88009f90fb88 ffffffff81410e22 ffff88009f90fbd0
<4>[  266.936488]  ffff88009f90fbc0 ffffffff81078cc6 ffff88009f1889a8 ffff8800a0517900
<4>[  266.936989]  ffff88009f06f000 ffff88009faabe00 0000000000000000 ffff88009f90fc20
<4>[  266.937484] Call Trace:
<4>[  266.937651]  [<ffffffff81410e22>] dump_stack+0x4b/0x69
<4>[  266.937973]  [<ffffffff81078cc6>] warn_slowpath_common+0x86/0xc0
<4>[  266.938341]  [<ffffffff81078d4c>] warn_slowpath_fmt+0x4c/0x50
<4>[  266.938694]  [<ffffffff810bc017>] ? finish_wait+0x67/0x80
<4>[  266.939067]  [<ffffffffa0304020>] intel_atomic_commit+0xf20/0xf30 [i915]
<4>[  266.939504]  [<ffffffffa009070c>] ? drm_atomic_check_only+0x14c/0x630 [drm]
<4>[  266.939924]  [<ffffffff810bc1c0>] ? wait_woken+0xb0/0xb0
<4>[  266.940271]  [<ffffffffa0090c27>] drm_atomic_commit+0x37/0x60 [drm]
<4>[  266.940664]  [<ffffffffa00f720e>] drm_atomic_helper_connector_dpms+0xee/0x1a0 [drm_kms_helper]
<4>[  266.941203]  [<ffffffffa0085d34>] drm_mode_obj_set_property_ioctl+0x234/0x240 [drm]
<4>[  266.941681]  [<ffffffffa0085d70>] drm_mode_connector_property_set_ioctl+0x30/0x40 [drm]
<4>[  266.942177]  [<ffffffffa0076862>] drm_ioctl+0x142/0x590 [drm]
<4>[  266.942543]  [<ffffffffa0085d40>] ? drm_mode_obj_set_property_ioctl+0x240/0x240 [drm]
<4>[  266.943019]  [<ffffffff813a85dc>] ? selinux_file_ioctl+0xfc/0x1c0
<4>[  266.943391]  [<ffffffff811fbe61>] do_vfs_ioctl+0x301/0x560
<4>[  266.943727]  [<ffffffff8109d7e2>] ? __might_sleep+0x52/0xb0
<4>[  266.944069]  [<ffffffff813a1203>] ? security_file_ioctl+0x43/0x60
<4>[  266.944438]  [<ffffffff811fc139>] SyS_ioctl+0x79/0x90
<4>[  266.944752]  [<ffffffff818c732e>] entry_SYSCALL_64_fastpath+0x12/0x71
<4>[  266.945145] ---[ end trace c2d98fc6a639183b ]---
<4>[  266.945145] ---[ end trace c2d98fc6a639183b ]---


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Ying Huang