[Bug 78383] [ilk regression] vblank stall in process exit wtf

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78383

Daniel Vetter <daniel at ffwll.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|piglit + igt has racy       |[ilk regression] vblank
                   |process exit apparently     |stall in process exit wtf

--- Comment #2 from Daniel Vetter <daniel at ffwll.ch> ---
Well, I'm still an idiot: kms_flip isn't a zombie yet, just dying:

[59495.529222] kms_flip        D ffff88023bd142c0     0  5136      1 0x00000002
[59495.529230]  ffff8802270ef9a8 0000000000000046 ffff88022c714a80
00000000000142c0
[59495.529239]  ffff8802270effd8 00000000000142c0 ffff880230146670
ffff88022c714a80
[59495.529248]  ffff8802270efa08 ffff88022d66b000 ffff88022cfb7de0
ffff88022d09e800
[59495.529257] Call Trace:
[59495.529263]  [<ffffffff816bb4f9>] schedule+0x29/0x70
[59495.529307]  [<ffffffffa00beb05>]
intel_crtc_wait_for_pending_flips+0x75/0x110 [i915]
[59495.529317]  [<ffffffff810c55d0>] ? bit_waitqueue+0xd0/0xd0
[59495.529352]  [<ffffffffa00c7c23>] intel_crtc_disable_planes+0x33/0x1b0
[i915]
[59495.529388]  [<ffffffffa00c80cd>] ironlake_crtc_disable+0x4d/0x920 [i915]
[59495.529424]  [<ffffffffa00c97d7>] __intel_set_mode+0x297/0x15c0 [i915]
[59495.529437]  [<ffffffff816b4297>] ? printk+0x61/0x63
[59495.529471]  [<ffffffffa00cd016>] intel_set_mode+0x16/0x30 [i915]
[59495.529509]  [<ffffffffa00cde73>] intel_crtc_set_config+0x903/0xe90 [i915]
[59495.529517]  [<ffffffff810be36e>] ? enqueue_task_fair+0x32e/0x540
[59495.529553]  [<ffffffffa00bfd0b>] ? intel_user_framebuffer_destroy+0x6b/0xd0
[i915]
[59495.529581]  [<ffffffffa003c4c9>] drm_mode_set_config_internal+0x69/0xf0
[drm]
[59495.529606]  [<ffffffffa003ce01>] drm_framebuffer_remove+0xe1/0x140 [drm]
[59495.529630]  [<ffffffffa0040e24>] drm_fb_release+0x94/0xc0 [drm]
[59495.529648]  [<ffffffffa0031df8>] drm_release+0x4c8/0x5a0 [drm]
[59495.529656]  [<ffffffff811d2867>] __fput+0xe7/0x1f0
[59495.529663]  [<ffffffff811d29be>] ____fput+0xe/0x10
[59495.529670]  [<ffffffff810a0525>] task_work_run+0xc5/0xe0
[59495.529678]  [<ffffffff8108421e>] do_exit+0x2be/0xa30
[59495.529687]  [<ffffffff811d14fc>] ? vfs_write+0x16c/0x1d0
[59495.529699]  [<ffffffff81084a1f>] do_group_exit+0x3f/0xa0
[59495.529711]  [<ffffffff81084a97>] SyS_exit_group+0x17/0x20
[59495.529721]  [<ffffffff816c7329>] system_call_fastpath+0x16/0x1b

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