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Date: Thu, 18 Dec 2014 18:04:45 -0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Thierry Reding <treding@...dia.com>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>, LKP <lkp@...org>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [drm/fb-helper] BUG: unable to handle kernel paging request at
95d24c70
Hi Thierry,
FYI, here is another bisect result.
commit 7bf2844ed14de049a4ccec26eb3d8b4c3d5c1971
Author: Thierry Reding <treding@...dia.com>
AuthorDate: Wed Dec 17 16:39:59 2014 +0100
Commit: Daniel Vetter <daniel.vetter@...ll.ch>
CommitDate: Wed Dec 17 22:05:08 2014 +0100
drm/fb-helper: Propagate errors from initial config failure
Make drm_fb_helper_initial_config() return an int rather than a bool so
that the error can be properly propagated. While at it, update drivers
to propagate errors further rather than just ignore them.
Cc: David Airlie <airlied@...ux.ie>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Patrik Jakobsson <patrik.r.jakobsson@...il.com>
Cc: Rob Clark <robdclark@...il.com>
Cc: Tomi Valkeinen <tomi.valkeinen@...com>
Cc: Alex Deucher <alexander.deucher@....com>
Cc: Christian König <christian.koenig@....com>
Cc: Ben Skeggs <bskeggs@...hat.com>
Signed-off-by: Thierry Reding <treding@...dia.com>
Reviewed-by: Alex Deucher <alexander.deucher@....com>
Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@...il.com>
Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch>
+------------------------------------------+------------+------------+---------------+
| | 7552e7dd95 | 7bf2844ed1 | next-20141218 |
+------------------------------------------+------------+------------+---------------+
| boot_successes | 60 | 0 | 0 |
| boot_failures | 0 | 20 | 26 |
| BUG:unable_to_handle_kernel | 0 | 20 | 26 |
| Oops | 0 | 20 | 26 |
| EIP_is_at_virt_to_head_page | 0 | 20 | 26 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 20 | 26 |
| backtrace:__pci_register_driver | 0 | 20 | 26 |
| backtrace:drm_pci_init | 0 | 20 | 26 |
| backtrace:cirrus_init | 0 | 20 | 26 |
| backtrace:kernel_init_freeable | 0 | 20 | 26 |
+------------------------------------------+------------+------------+---------------+
[ 1.509413] cirrusdrmfb: enable CONFIG_FB_LITTLE_ENDIAN to support this framebuffer
[ 1.510493] [drm:cirrus_modeset_init] *ERROR* cirrus_fbdev_init failed
[ 1.511405] cirrus 0000:00:02.0: Fatal error during modeset init: -22
[ 1.513064] BUG: unable to handle kernel paging request at 95d24c70
[ 1.513775] IP: [<8109e956>] virt_to_head_page+0x15/0x2a
[ 1.513775] *pdpt = 0000000001c48001 *pde = 0000000000000000
[ 1.513775] Oops: 0000 [#1] DEBUG_PAGEALLOC
[ 1.513775] CPU: 0 PID: 1 Comm: swapper Not tainted 3.18.0-rc4-00653-g7bf2844 #26
[ 1.513775] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1.513775] task: 80100000 ti: 80072000 task.ti: 80072000
[ 1.513775] EIP: 0060:[<8109e956>] EFLAGS: 00010282 CPU: 0
[ 1.513775] EIP is at virt_to_head_page+0x15/0x2a
[ 1.513775] EAX: 6b6b6b6b EBX: 6b6b6b6b ECX: 00110005 EDX: 95d24c70
[ 1.513775] ESI: 00000000 EDI: 9208dfc4 EBP: 80073d8c ESP: 80073d8c
[ 1.513775] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
[ 1.513775] CR0: 8005003b CR2: 95d24c70 CR3: 01c4c000 CR4: 000006b0
[ 1.513775] Stack:
[ 1.513775] 80073dac 810a0c1a 81098f98 81098f98 0000023f 91196db0 00000000 9208dfc4
[ 1.513775] 80073dc0 8136b055 91196db0 9208a2c0 9208dfc4 80073dcc 8136b6c1 91196db0
[ 1.513775] 80073de4 813fd7d4 9174ec24 9208a2c0 9208df90 9208a2c0 80073df0 813fd037
[ 1.513775] Call Trace:
[ 1.513775] [<810a0c1a>] kfree+0x19/0xc4
[ 1.513775] [<81098f98>] ? __vunmap+0x8f/0x97
[ 1.513775] [<81098f98>] ? __vunmap+0x8f/0x97
[ 1.513775] [<8136b055>] drm_fb_helper_crtc_free+0x1a/0x5a
[ 1.513775] [<8136b6c1>] drm_fb_helper_fini+0x4f/0x54
[ 1.513775] [<813fd7d4>] cirrus_fbdev_fini+0x9a/0xcb
[ 1.513775] [<813fd037>] cirrus_modeset_fini+0xb/0x1f
[ 1.513775] [<813fc2fb>] cirrus_driver_unload+0x15/0x37
[ 1.513775] [<813fc3c8>] cirrus_driver_load+0xab/0xb5
[ 1.513775] [<813730cc>] drm_dev_register+0x69/0xcb
[ 1.513775] [<8137438e>] drm_get_pci_dev+0xc8/0x15c
[ 1.513775] [<813fd11a>] cirrus_pci_probe+0xbf/0xc7
[ 1.513775] [<8127c6b6>] pci_device_probe+0x45/0x7f
[ 1.513775] [<81428648>] driver_probe_device+0x83/0x175
[ 1.513775] [<814287b4>] __driver_attach+0x4e/0x6a
[ 1.513775] [<81427490>] bus_for_each_dev+0x4e/0x6b
[ 1.513775] [<81428850>] driver_attach+0x14/0x16
[ 1.513775] [<81428766>] ? __device_attach+0x2c/0x2c
[ 1.513775] [<81427ac9>] bus_add_driver+0xc5/0x175
[ 1.513775] [<81bed76c>] ? i915_init+0x69/0x69
[ 1.513775] [<81428b8c>] driver_register+0x6f/0xa4
[ 1.513775] [<81bed76c>] ? i915_init+0x69/0x69
[ 1.513775] [<8127c589>] __pci_register_driver+0x45/0x48
[ 1.513775] [<81374469>] drm_pci_init+0x47/0xb3
[ 1.513775] [<81bed76c>] ? i915_init+0x69/0x69
[ 1.513775] [<81bed78c>] cirrus_init+0x20/0x22
[ 1.513775] [<81bc6b3f>] do_one_initcall+0xce/0x145
[ 1.513775] [<81bc6400>] ? do_early_param+0x3e/0x73
[ 1.513775] [<8103ad44>] ? parse_args+0x19d/0x280
[ 1.513775] [<81bc6d16>] kernel_init_freeable+0x160/0x1e0
[ 1.513775] [<816801fc>] kernel_init+0x8/0xb8
[ 1.513775] [<8168b480>] ret_from_kernel_thread+0x20/0x30
[ 1.513775] [<816801f4>] ? rest_init+0xa2/0xa2
[ 1.513775] Code: ba e1 05 00 00 b8 d0 51 8d 81 e8 a9 c5 f8 ff eb ce 5b 5e 5f 5d c3 55 89 e5 8d 90 00 00 00 80 c1 ea 0c 6b d2 28 03 15 94 b1 24 82 <8b> 02 f6 c4 80 74 0a 8b 42 1c 8b 0a 80 e5 80 75 02 89 d0 5d c3
[ 1.513775] EIP: [<8109e956>] virt_to_head_page+0x15/0x2a SS:ESP 0068:80073d8c
[ 1.513775] CR2: 0000000095d24c70
[ 1.513775] ---[ end trace 705e9141a788c5b7 ]---
[ 1.513775] Kernel panic - not syncing: Fatal exception
git bisect start cfaa3a95dd2b402599b1d8122dc3107478db8717 b2776bf7149bddd1f4161f14f79520f17fc1d71d --
git bisect good caf292ae5bb9d57198ce001d8b762f7abae3a94d # 00:17 15+ 0 Merge branch 'for-3.19/core' of git://git.kernel.dk/linux-block
git bisect good f9dfabdfd3aae1ed36d79f5dc471a716df6131ed # 00:30 15+ 0 Merge remote-tracking branch 'blackfin/for-linus'
git bisect good 02c4f9a3e4d358e189e70fbd0a4fde7f2eef2a92 # 00:52 15+ 0 Merge remote-tracking branch 'drm-intel/for-linux-next'
git bisect bad 9a8a9b528fe3ab109066e81080387fcbfb2d0c5b # 01:18 0- 15 Merge remote-tracking branch 'kvm/linux-next'
git bisect bad fda825ebcf5bcaced500c0cc7021b232a19d3335 # 01:59 0- 20 Merge remote-tracking branch 'omap_dss2/for-next'
git bisect bad 34ed88f9a8aa0bcf2c928a5bc4756a8d31d5dab7 # 02:07 0- 13 Merge remote-tracking branch 'block/for-next'
git bisect bad b2d1c429aace4bbf67de839d2173c41581f7c43f # 02:44 0- 20 Merge remote-tracking branch 'modules/modules-next'
git bisect bad 6648d4ac81c1720971701bbeabfe6ef655ee6b0e # 03:03 0- 20 Merge remote-tracking branch 'drm-misc/topic/core-stuff'
git bisect good ae28290be3871969fc3f64b480d42575a16ae990 # 03:12 20+ 0 drm: bit of spell-check / editorializing.
git bisect good abc0b1447d4974963548777a5ba4a4457c82c426 # 03:25 20+ 0 drm: Perform basic sanity checks on probed modes
git bisect good b46004b70367974d5318caeabfd435017adf9e2a # 03:34 20+ 0 drm: Move IRQ related fields to proper section
git bisect good 7552e7dd9527c41f891c87854418896eaf309c20 # 04:08 20+ 0 drm: Include drm_crtc_helper.h in DocBook
git bisect bad 7bf2844ed14de049a4ccec26eb3d8b4c3d5c1971 # 04:14 0- 20 drm/fb-helper: Propagate errors from initial config failure
# first bad commit: [7bf2844ed14de049a4ccec26eb3d8b4c3d5c1971] drm/fb-helper: Propagate errors from initial config failure
git bisect good 7552e7dd9527c41f891c87854418896eaf309c20 # 04:16 60+ 0 drm: Include drm_crtc_helper.h in DocBook
# extra tests on HEAD of next/master
git bisect bad cfaa3a95dd2b402599b1d8122dc3107478db8717 # 04:16 0- 26 Add linux-next specific files for 20141218
# extra tests on tree/branch next/master
git bisect bad cfaa3a95dd2b402599b1d8122dc3107478db8717 # 04:16 0- 26 Add linux-next specific files for 20141218
# extra tests on tree/branch linus/master
git bisect good c297abfdf15b4480704d6b566ca5ca9438b12456 # 07:08 60+ 0 mnt: Fix a memory stomp in umount
# extra tests on tree/branch next/master
git bisect bad cfaa3a95dd2b402599b1d8122dc3107478db8717 # 07:08 0- 26 Add linux-next specific files for 20141218
This script may reproduce the error.
----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
initrd=yocto-minimal-i386.cgz
wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd
kvm=(
qemu-system-x86_64
-cpu kvm64
-enable-kvm
-kernel $kernel
-initrd $initrd
-m 320
-smp 1
-net nic,vlan=1,model=e1000
-net user,vlan=1
-boot order=nc
-no-reboot
-watchdog i6300esb
-rtc base=localtime
-serial stdio
-display none
-monitor null
)
append=(
hung_task_panic=1
earlyprintk=ttyS0,115200
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
drbd.minor_count=8
)
"${kvm[@]}" --append "${append[*]}"
----------------------------------------------------------------------------
Thanks,
Fengguang
View attachment "dmesg-yocto-vp-5:20141219041342:i386-randconfig-j0-12151340:3.18.0-rc4-00653-g7bf2844:26" of type "text/plain" (33523 bytes)
View attachment "config-3.18.0-rc4-00653-g7bf2844" of type "text/plain" (72042 bytes)
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