From: Sasha Levin <Alexander.Levin@microsoft.com>
To: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>,
Greg KH <gregkh@linuxfoundation.org>,
"ksummit-discuss@lists.linuxfoundation.org"
<ksummit-discuss@lists.linuxfoundation.org>
Subject: Re: [Ksummit-discuss] [MAINTAINER SUMMIT] Stable trees and release time
Date: Wed, 5 Sep 2018 20:18:51 +0000 [thread overview]
Message-ID: <20180905201848.GV16300@sasha-vm> (raw)
In-Reply-To: <20180905190902.GU16300@sasha-vm>
On Wed, Sep 05, 2018 at 03:09:02PM -0400, Sasha Levin wrote:
>On Wed, Sep 05, 2018 at 06:26:17PM +0200, Daniel Vetter wrote:
>>Note that because of fbcon and other reasons, an rmmod i915 will fail.
>>You need to enable a bunch of CONFIG_EXPERT options (with scary texts
>>and stuff) and have a script from our test suite to be able to even
>>make this happen.
>
>Hm, how does that work?
>
>On an Ubuntu 4.18 kernel I can remove i915 just by:
>
>root@jumpy:~# echo 1 > /sys/devices/pci0000\:00/0000\:00\:02.0/remove
>root@jumpy:~# sudo rmmod i915
... which apparently spews a warning and hangs the system:
[ 802.065412] PCH DPLL A assertion failure (expected on, current off)
[ 802.065574] WARNING: CPU: 1 PID: 804 at drivers/gpu/drm/i915/intel_dpll_mgr.c:124 assert_shared_dpll+0x106/0x120 [i915]
[ 802.065576] Modules linked in: intel_rapl x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm irqbypass arc4 snd_hda_codec_hdmi crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc iwldvm snd_hda_codec_conexant snd_hda_codec_generic mac80211 gpio_ich snd_hda_intel iwlwifi snd_hda_codec aesni_intel aes_x86_64 crypto_simd snd_hda_core cryptd glue_helper snd_hwdep input_leds intel_cstate intel_rapl_perf joydev snd_pcm serio_raw cfg80211 wmi_bmof snd_timer lpc_ich mei_me mei thinkpad_acpi nvram snd soundcore mac_hid binfmt_misc sch_fq_codel coretemp ip_tables x_tables autofs4 i915 i2c_algo_bit drm_kms_helper psmouse syscopyarea e1000e sysfillrect sysimgblt fb_sys_fops sdhci_pci ahci drm cqhci libahci sdhci wmi video
[ 802.065678] CPU: 1 PID: 804 Comm: bash Not tainted 4.18.6-041806-generic #201809050847
[ 802.065681] Hardware name: LENOVO 4236AT9/4236AT9, BIOS 83ET66WW (1.36 ) 10/31/2011
[ 802.065769] RIP: 0010:assert_shared_dpll+0x106/0x120 [i915]
[ 802.065770] Code: c7 c2 42 cc 36 c0 48 8b 83 88 00 00 00 48 89 f1 48 c7 c7 40 49 38 c0 48 0f 44 ca 45 84 e4 48 0f 45 d6 48 8b 30 e8 5c 60 7b dc <0f> 0b e9 40 ff ff ff e8 ae 5d 7b dc 66 66 2e 0f 1f 84 00 00 00 00
[ 802.065883] RSP: 0018:ffffba82014d3a28 EFLAGS: 00010282
[ 802.065887] RAX: 0000000000000000 RBX: ffff9a3e8977e350 RCX: 0000000000000006
[ 802.065890] RDX: 0000000000000007 RSI: 0000000000000092 RDI: ffff9a3e9e2564b0
[ 802.065893] RBP: ffffba82014d3ac0 R08: 0000000000000001 R09: 0000000000000341
[ 802.065895] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000001
[ 802.065898] R13: 0000000000000001 R14: ffff9a3e89778000 R15: ffff9a3e8977e6b8
[ 802.065902] FS: 00007fcd73414740(0000) GS:ffff9a3e9e240000(0000) knlGS:0000000000000000
[ 802.065905] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 802.065908] CR2: 000055cf3a21ae00 CR3: 00000002137b4002 CR4: 00000000000606e0
[ 802.065911] Call Trace:
[ 802.065926] ? __cancel_work_timer+0x110/0x190
[ 802.066003] ? intel_set_pch_fifo_underrun_reporting+0xec/0x180 [i915]
[ 802.066082] intel_disable_shared_dpll+0xa2/0x140 [i915]
[ 802.066162] intel_atomic_commit_tail+0x210/0xd10 [i915]
[ 802.066244] intel_atomic_commit+0x2b8/0x2f0 [i915]
[ 802.066290] drm_atomic_commit+0x4a/0x50 [drm]
[ 802.066315] __drm_atomic_helper_disable_all+0x190/0x1d0 [drm_kms_helper]
[ 802.066335] drm_atomic_helper_shutdown+0x5c/0xb0 [drm_kms_helper]
[ 802.066397] i915_driver_unload+0x8a/0x120 [i915]
[ 802.066462] i915_pci_remove+0x19/0x30 [i915]
[ 802.066470] pci_device_remove+0x3e/0xc0
[ 802.066479] device_release_driver_internal+0x18c/0x250
[ 802.066486] device_release_driver+0x12/0x20
[ 802.066492] pci_stop_bus_device+0x82/0xa0
[ 802.066498] pci_stop_and_remove_bus_device_locked+0x1a/0x30
[ 802.066504] remove_store+0x7c/0x90
[ 802.066509] dev_attr_store+0x1b/0x30
[ 802.066515] sysfs_kf_write+0x3b/0x50
[ 802.066520] kernfs_fop_write+0x12e/0x1b0
[ 802.066526] __vfs_write+0x3a/0x190
[ 802.066533] ? common_file_perm+0x4d/0x140
[ 802.066538] ? apparmor_file_permission+0x1a/0x20
[ 802.066546] ? security_file_permission+0x2f/0xb0
[ 802.066554] ? _cond_resched+0x19/0x30
[ 802.066559] vfs_write+0xab/0x1b0
[ 802.066564] ksys_write+0x55/0xc0
[ 802.066569] __x64_sys_write+0x1a/0x20
[ 802.066576] do_syscall_64+0x5a/0x110
[ 802.066583] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 802.066588] RIP: 0033:0x7fcd72ae9154
[ 802.066589] Code: 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 8d 05 b1 07 2e 00 8b 00 85 c0 75 13 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 f3 c3 66 90 41 54 55 49 89 d4 53 48 89 f5
[ 802.066668] RSP: 002b:00007ffdc88ea2c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 802.066673] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fcd72ae9154
[ 802.066676] RDX: 0000000000000002 RSI: 0000561e2995ec20 RDI: 0000000000000001
[ 802.066678] RBP: 0000561e2995ec20 R08: 000000000000000a R09: 0000000000000001
[ 802.066681] R10: 000000000000000a R11: 0000000000000246 R12: 00007fcd72dc5760
[ 802.066683] R13: 0000000000000002 R14: 00007fcd72dc12a0 R15: 00007fcd72dc0760
[ 802.066689] ---[ end trace 45b9f0b00b7e9277 ]---
--
Thanks,
Sasha
next prev parent reply other threads:[~2018-09-05 20:18 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-04 20:58 Laura Abbott
2018-09-04 21:12 ` Jiri Kosina
2018-09-05 14:31 ` Greg KH
2018-09-04 21:22 ` Justin Forbes
2018-09-05 14:42 ` Greg KH
2018-09-05 15:10 ` Mark Brown
2018-09-05 15:10 ` Sasha Levin
2018-09-05 16:19 ` Guenter Roeck
2018-09-05 18:31 ` Laura Abbott
2018-09-05 21:23 ` Justin Forbes
2018-09-06 2:17 ` Eduardo Valentin
2018-09-04 21:33 ` Sasha Levin
2018-09-04 21:55 ` Guenter Roeck
2018-09-04 22:03 ` Laura Abbott
2018-09-04 23:14 ` Sasha Levin
2018-09-04 23:43 ` Guenter Roeck
2018-09-05 1:17 ` Laura Abbott
2018-09-06 3:56 ` Benjamin Gilbert
2018-09-04 21:58 ` Laura Abbott
2018-09-05 4:53 ` Sasha Levin
2018-09-05 6:48 ` Jiri Kosina
2018-09-05 8:16 ` Jan Kara
2018-09-05 8:32 ` Jiri Kosina
2018-09-05 8:56 ` Greg KH
2018-09-05 9:13 ` Geert Uytterhoeven
2018-09-05 9:33 ` Greg KH
2018-09-05 10:11 ` Mark Brown
2018-09-05 14:44 ` Steven Rostedt
2018-09-05 9:58 ` James Bottomley
2018-09-05 10:47 ` Mark Brown
2018-09-05 12:24 ` James Bottomley
2018-09-05 12:53 ` Jiri Kosina
2018-09-05 13:05 ` Greg KH
2018-09-05 13:15 ` Jiri Kosina
2018-09-05 14:00 ` Greg KH
2018-09-05 14:06 ` Sasha Levin
2018-09-05 21:02 ` Jiri Kosina
2018-09-05 16:39 ` James Bottomley
2018-09-05 17:06 ` Dmitry Torokhov
2018-09-05 17:33 ` Steven Rostedt
2018-09-05 13:03 ` Takashi Iwai
2018-09-05 13:27 ` Daniel Vetter
2018-09-05 14:05 ` Greg KH
2018-09-05 15:54 ` Daniel Vetter
2018-09-05 16:19 ` Sasha Levin
2018-09-05 16:26 ` Daniel Vetter
2018-09-05 19:09 ` Sasha Levin
2018-09-05 20:18 ` Sasha Levin [this message]
2018-09-05 20:33 ` Daniel Vetter
2018-09-05 14:20 ` Sasha Levin
2018-09-05 14:30 ` Takashi Iwai
2018-09-05 14:41 ` Sasha Levin
2018-09-05 14:46 ` Takashi Iwai
2018-09-05 14:54 ` Sasha Levin
2018-09-05 15:12 ` Takashi Iwai
2018-09-05 15:19 ` Thomas Gleixner
2018-09-05 15:29 ` Sasha Levin
2018-09-05 13:16 ` Mark Brown
2018-09-05 14:27 ` Sasha Levin
2018-09-05 14:50 ` Mark Brown
2018-09-05 15:00 ` Sasha Levin
2018-09-05 10:28 ` Thomas Gleixner
2018-09-05 11:20 ` Jiri Kosina
2018-09-05 14:41 ` Thomas Gleixner
2018-09-05 15:18 ` Steven Rostedt
2018-09-06 8:48 ` Thomas Gleixner
2018-09-06 12:47 ` Thomas Gleixner
2018-09-04 21:49 ` Guenter Roeck
2018-09-04 22:06 ` Laura Abbott
2018-09-04 23:35 ` Guenter Roeck
2018-09-05 1:45 ` Laura Abbott
2018-09-05 2:54 ` Guenter Roeck
2018-09-05 8:31 ` Jan Kara
2018-09-05 3:44 ` Eduardo Valentin
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