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Date: Mon, 2 Jun 2014 15:26:07 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Jesse Barnes <jbarnes@...tuousgeek.org>
Cc: Jet Chen <jet.chen@...el.com>, Yuanhan Liu <yuanhan.liu@...el.com>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [drm] INFO: possible recursive locking detected
Hi Jesse,
Here is another warning message introduced by the same commit:
git://people.freedesktop.org/~jbarnes/linux async-fb-probe
commit b739c9982801e5f76097311b67dfd76891b10988
Author: Jesse Barnes <jbarnes@...tuousgeek.org>
AuthorDate: Wed May 28 10:21:17 2014 -0700
Commit: Jesse Barnes <jbarnes@...tuousgeek.org>
CommitDate: Wed May 28 12:17:34 2014 -0700
drm: take modeset locks around initial fb helper probing
Drivers ought to complain otherwise.
Signed-off-by: Jesse Barnes <jbarnes@...tuousgeek.org>
+------------------------------------------+------------+------------+------------------+
| | 071f9c57ee | b739c99828 | v3.15-rc8_060210 |
+------------------------------------------+------------+------------+------------------+
| boot_successes | 60 | 0 | 0 |
| boot_failures | 0 | 20 | 13 |
| INFO:possible_recursive_locking_detected | 0 | 20 | 13 |
| BUG:kernel_boot_hang | 0 | 20 | 13 |
| backtrace:drm_fb_helper_initial_config | 0 | 20 | 13 |
| backtrace:cirrus_fbdev_init | 0 | 20 | 13 |
| backtrace:cirrus_modeset_init | 0 | 20 | 13 |
| backtrace:__pci_register_driver | 0 | 20 | 13 |
| backtrace:drm_pci_init | 0 | 20 | 13 |
| backtrace:cirrus_init | 0 | 20 | 13 |
| backtrace:kernel_init_freeable | 0 | 20 | 13 |
+------------------------------------------+------------+------------+------------------+
[ 3.631605] [TTM] Initializing DMA pool allocator
[ 3.633678]
[ 3.634003] =============================================
[ 3.634003] [ INFO: possible recursive locking detected ]
[ 3.634003] 3.15.0-rc5-00090-gb739c99 #1 Not tainted
[ 3.634003] ---------------------------------------------
[ 3.634003] swapper/0/1 is trying to acquire lock:
[ 3.634003] (&dev->mode_config.mutex){+.+.+.}, at: [<ffffffff81919245>] drm_modeset_lock_all+0x35/0x80
[ 3.634003]
[ 3.634003] but task is already holding lock:
[ 3.634003] (&dev->mode_config.mutex){+.+.+.}, at: [<ffffffff81903a19>] drm_fb_helper_initial_config+0x119/0x730
[ 3.634003]
[ 3.634003] other info that might help us debug this:
[ 3.634003] Possible unsafe locking scenario:
[ 3.634003]
[ 3.634003] CPU0
[ 3.634003] ----
[ 3.634003] lock(&dev->mode_config.mutex);
[ 3.634003] lock(&dev->mode_config.mutex);
[ 3.634003]
[ 3.634003] *** DEADLOCK ***
[ 3.634003]
[ 3.634003] May be due to missing lock nesting notation
[ 3.634003]
[ 3.634003] 4 locks held by swapper/0/1:
[ 3.634003] #0: (&dev->mutex){......}, at: [<ffffffff81b63363>] __driver_attach+0x73/0x100
[ 3.634003] #1: (&dev->mutex){......}, at: [<ffffffff81b63379>] __driver_attach+0x89/0x100
[ 3.634003] #2: (drm_global_mutex){+.+.+.}, at: [<ffffffff8191278a>] drm_dev_register+0x2a/0x1c0
[ 3.634003] #3: (&dev->mode_config.mutex){+.+.+.}, at: [<ffffffff81903a19>] drm_fb_helper_initial_config+0x119/0x730
[ 3.634003]
[ 3.634003] stack backtrace:
[ 3.634003] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.15.0-rc5-00090-gb739c99 #1
[ 3.634003] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 3.634003] ffff8800121807a8 ffff8800121839e8 ffffffff82752935 ffff880012180010
[ 3.634003] ffff880012183a58 ffffffff8113c027 0000000000000000 ffff8800121807a8
[ 3.634003] ffff880012183a78 ffffffff00000000 27e13f0d1869834c 0000000000000a00
[ 3.634003] Call Trace:
[ 3.634003] [<ffffffff82752935>] dump_stack+0x85/0xba
[ 3.634003] [<ffffffff8113c027>] __lock_acquire+0x1f37/0x22c0
[ 3.634003] [<ffffffff8113c49b>] lock_acquire+0xeb/0x1c0
[ 3.634003] [<ffffffff81919245>] ? drm_modeset_lock_all+0x35/0x80
[ 3.634003] [<ffffffff8276ad35>] mutex_lock_nested+0x85/0x600
[ 3.634003] [<ffffffff81919245>] ? drm_modeset_lock_all+0x35/0x80
[ 3.634003] [<ffffffff811378ad>] ? trace_hardirqs_on+0x1d/0x30
[ 3.634003] [<ffffffff81903a19>] ? drm_fb_helper_initial_config+0x119/0x730
[ 3.634003] [<ffffffff8171a24b>] ? fb_get_options+0x2b/0x240
[ 3.634003] [<ffffffff81919245>] drm_modeset_lock_all+0x35/0x80
[ 3.634003] [<ffffffff81903a29>] drm_fb_helper_initial_config+0x129/0x730
[ 3.634003] [<ffffffff811378ad>] ? trace_hardirqs_on+0x1d/0x30
[ 3.634003] [<ffffffff819192fa>] ? drm_modeset_unlock_all+0x6a/0x80
[ 3.634003] [<ffffffff81a0b42d>] cirrus_fbdev_init+0xcd/0x110
[ 3.634003] [<ffffffff81a0a744>] cirrus_modeset_init+0x234/0x2d0
[ 3.634003] [<ffffffff81a08d46>] cirrus_driver_load+0x96/0x1a0
[ 3.634003] [<ffffffff81912875>] drm_dev_register+0x115/0x1c0
[ 3.634003] [<ffffffff819159e8>] drm_get_pci_dev+0x138/0x320
[ 3.634003] [<ffffffff811378ad>] ? trace_hardirqs_on+0x1d/0x30
[ 3.634003] [<ffffffff81a0a975>] cirrus_pci_probe+0x105/0x140
[ 3.634003] [<ffffffff816c0840>] pci_device_probe+0xe0/0x1c0
[ 3.634003] [<ffffffff81b62e3c>] driver_probe_device+0xcc/0x580
[ 3.634003] [<ffffffff81b633db>] __driver_attach+0xeb/0x100
[ 3.634003] [<ffffffff81b632f0>] ? driver_probe_device+0x580/0x580
[ 3.634003] [<ffffffff81b5ff73>] bus_for_each_dev+0xb3/0x110
[ 3.634003] [<ffffffff81b62976>] driver_attach+0x26/0x30
[ 3.634003] [<ffffffff81b61048>] bus_add_driver+0x208/0x390
[ 3.634003] [<ffffffff83c6f5e0>] ? intel_no_lvds_dmi_callback+0x2b/0x2b
[ 3.634003] [<ffffffff81b63a70>] driver_register+0xb0/0x1a0
[ 3.634003] [<ffffffff83c6f5e0>] ? intel_no_lvds_dmi_callback+0x2b/0x2b
[ 3.634003] [<ffffffff816c098d>] __pci_register_driver+0x6d/0x80
[ 3.634003] [<ffffffff81915d19>] drm_pci_init+0x149/0x180
[ 3.634003] [<ffffffff83c6f5e0>] ? intel_no_lvds_dmi_callback+0x2b/0x2b
[ 3.634003] [<ffffffff83c6f643>] cirrus_init+0x63/0x6c
[ 3.634003] [<ffffffff83c085e5>] do_one_initcall+0xe8/0x1cc
[ 3.634003] [<ffffffff81101645>] ? parse_args+0x2a5/0x5c0
[ 3.634003] [<ffffffff83c08893>] kernel_init_freeable+0x1ca/0x2c9
[ 3.634003] [<ffffffff83c07ad7>] ? do_early_param+0xd7/0xd7
[ 3.634003] [<ffffffff8273fde0>] ? rest_init+0x120/0x120
[ 3.634003] [<ffffffff8273fdf6>] kernel_init+0x16/0x1b0
[ 3.634003] [<ffffffff82771dfc>] ret_from_fork+0x7c/0xb0
[ 3.634003] [<ffffffff8273fde0>] ? rest_init+0x120/0x120
[ 61.168100] spin_lock-torture: Writes: Total: 4 Max/Min: 0/0 Fail: 0
[ 121.169074] spin_lock-torture: Writes: Total: 4 Max/Min: 0/0 Fail: 0
[ 181.170111] spin_lock-torture: Writes: Total: 4 Max/Min: 0/0 Fail: 0
git bisect start 5dba024fe84a491ec3ca15193923fcbb938e68f7 fad01e866afdbe01a1f3ec06a39c3a8b9e197014 --
git bisect good 12072cdd5c9b56bb6d4169c5a52c9d0bf64b7f84 # 12:04 19+ 0 Merge 'gxt/unicore32' into devel-hourly-2014060210
git bisect good eb1a12ad1d5a7312a6f3dc6a8b77c51cbe58641e # 12:10 19+ 0 Merge 'luto/auditsc-lite' into devel-hourly-2014060210
git bisect good d641155270aff21eacd2622e30129cd91fe8d2d2 # 12:23 19+ 0 Merge 'wsa/i2c/for-next' into devel-hourly-2014060210
git bisect good 002fa82dac6f0be486333e6424968c0c42c0e799 # 12:30 19+ 0 Merge 'jbarnes/async' into devel-hourly-2014060210
git bisect bad 1ea52a9605be1234b7da3e4d134917c7ba3be93d # 12:57 0- 19 Merge 'jbarnes/async-fb-probe' into devel-hourly-2014060210
git bisect bad f728080d6bac47aab2d570492acef88317ac8e03 # 13:52 0- 15 drm/i915: make fbdev initialization asynchronous v2
git bisect bad b739c9982801e5f76097311b67dfd76891b10988 # 14:13 0- 5 drm: take modeset locks around initial fb helper probing
# first bad commit: [b739c9982801e5f76097311b67dfd76891b10988] drm: take modeset locks around initial fb helper probing
git bisect good 071f9c57eea4876288ba1254c9ac3b0f077c2dd6 # 14:30 60+ 0 drm/i915/vlv: enable PPGTT
git bisect bad 5dba024fe84a491ec3ca15193923fcbb938e68f7 # 14:30 0- 13 0day head guard for 'devel-hourly-2014060210'
git bisect good fad01e866afdbe01a1f3ec06a39c3a8b9e197014 # 14:42 60+ 1 Linux 3.15-rc8
git bisect good 322c030f5462a44ce42f8804284eb52b7cd2ba41 # 14:55 60+ 7 Add linux-next specific files for 20140530
This script may reproduce the error.
-----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
initrd=quantal-core-x86_64.cgz
wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/blob/master/initrd/$initrd
kvm=(
qemu-system-x86_64 -cpu kvm64 -enable-kvm
-kernel $kernel
-initrd $initrd
-smp 2
-m 256M
-net nic,vlan=0,macaddr=00:00:00:00:00:00,model=virtio
-net user,vlan=0
-net nic,vlan=1,model=e1000
-net user,vlan=1
-boot order=nc
-no-reboot
-watchdog i6300esb
-serial stdio
-display none
-monitor null
)
append=(
debug
sched_debug
apic=debug
ignore_loglevel
sysrq_always_enabled
panic=10
prompt_ramdisk=0
earlyprintk=ttyS0,115200
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
)
"${kvm[@]}" --append "${append[*]}"
-----------------------------------------------------------------------------
Thanks,
Fengguang
View attachment "dmesg-quantal-ivb43-29:20140602141427:x86_64-randconfig-hsxa0-06021100:3.15.0-rc5-00090-gb739c99:1" of type "text/plain" (54838 bytes)
Download attachment "x86_64-randconfig-hsxa0-06021100-5dba024fe84a491ec3ca15193923fcbb938e68f7-INFO:-possible-recursive-locking-detected-102872.log" of type "application/octet-stream" (57438 bytes)
View attachment "config-3.15.0-rc5-00090-gb739c99" of type "text/plain" (91925 bytes)
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