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Message-ID: <20140219121703.GD7241@localhost>
Date: Wed, 19 Feb 2014 20:17:03 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Alex Shi <alex.shi@...aro.org>
Cc: linux-kernel@...r.kernel.org
Subject: [sched/balance] BUG: MAX_LOCK_DEPTH too low!
Greetings,
I got the below dmesg and the first bad commit is
https://github.com/alexshi/power-scheduling.git single-balance
commit 98564060e5c360908d93f61a78ccbef4a082d3c2
Author: Alex Shi <alex.shi@...aro.org>
AuthorDate: Tue Feb 18 21:01:54 2014 +0800
Commit: Alex Shi <alex.shi@...aro.org>
CommitDate: Tue Feb 18 21:33:06 2014 +0800
sched/balance: add balance_interval to tuning top level balance frequency
Since central balance stains less cpu cache as current balance, we
can set the balance interval more short.
Signed-off-by: Alex Shi <alex.shi@...aro.org>
[ 1.180022] softirq: huh, entered softirq 7 SCHED 4107f776 with preempt_count 00000100, exited with 00000101?
[ 1.183355] softirq: huh, entered softirq 7 SCHED 4107f776 with preempt_count 00000100, exited with 00000101?
[ 1.186691] softirq: huh, entered softirq 7 SCHED 4107f776 with preempt_count 00000100, exited with 00000101?
[ 1.187437] BUG: MAX_LOCK_DEPTH too low!
[ 1.187731] turning off the locking correctness validator.
[ 1.188138] Please attach the output of /proc/lock_stat to the bug report
[ 1.188643] depth: 48 max: 48!
[ 1.188881] 48 locks held by swapper/0/1:
[ 1.189194] #0: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.189827] #1: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #2: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #3: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #4: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #5: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #6: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #7: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #8: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #9: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #10: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #11: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #12: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #13: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #14: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #15: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #16: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #17: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #18: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #19: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #20: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #21: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #22: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #23: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #24: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #25: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #26: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #27: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #28: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #29: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #30: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #31: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #32: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #33: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #34: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #35: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #36: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #37: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #38: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #39: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #40: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #41: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #42: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #43: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #44: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #45: (rcu_read_lock){.+.+..}, at: [<4107d10c>] rcu_read_lock+0x0/0x28
[ 1.190010] #46: (&rq->lock){-.-.-.}, at: [<4158e188>] __schedule+0x7e/0x5ce
[ 1.190010] #47: ((null)){.-.-..}, at: [<4158e243>] __schedule+0x139/0x5ce
git bisect start d5471974ffc0bd5cbf7213231e4d6276007cab37 6d0abeca3242a88cab8232e4acd7e2bf088f3bc2 --
git bisect good 52732e61f8895e45c10f3b1977b1252a58a2b64e # 01:08 23+ 6 Merge 'drdb/for-3.15-p2' into devel-hourly-2014021821
git bisect good 9737c3be3ccc4aac6ab919b897dcf68c4a2b4f33 # 01:13 23+ 7 Merge 'arm-perf/misc-patches' into devel-hourly-2014021821
git bisect good 0e1ba5d0198d3d1cd947287661fc9ac30164e666 # 01:16 23+ 0 Merge 'regulator/topic/tps6507x' into devel-hourly-2014021821
git bisect good b8e87ddb72da627fd03aeb02b77c07065e13427c # 01:20 23+ 11 Merge 'iio/fixes-togreg' into devel-hourly-2014021821
git bisect good 6648c2574f90963cb0bc2421f00f173e9fdc8cc0 # 01:24 23+ 3 Merge 'arm-perf/pci/bios32' into devel-hourly-2014021821
git bisect bad 037d40fe91c5721054a8d1a61cd926dbdb75f968 # 01:28 0- 1 Merge 'alexshi/single-balance' into devel-hourly-2014021821
git bisect good 4a5d7c9f371d437e80369739bc7c38743f0d87c3 # 01:32 23+ 3 sched: rename update_*_cpu_load
git bisect good 480c3ba7685296b8da892020d408223e7abdc70b # 01:35 23+ 9 sched: remove un-used functions
git bisect good 0e32dab5df39cfb1be9a937d67c877404b964324 # 01:37 23+ 11 sched/balance: rebuild ovutil tree after task moving
git bisect bad 98564060e5c360908d93f61a78ccbef4a082d3c2 # 01:38 0- 6 sched/balance: add balance_interval to tuning top level balance frequency
git bisect good 34c6c7844fd7ac6b7636614534d83c1099ab6fc7 # 01:42 23+ 3 sched/balance: add llc balance interval
# first bad commit: [98564060e5c360908d93f61a78ccbef4a082d3c2] sched/balance: add balance_interval to tuning top level balance frequency
git bisect good 34c6c7844fd7ac6b7636614534d83c1099ab6fc7 # 01:45 69+ 20 sched/balance: add llc balance interval
git bisect bad d5471974ffc0bd5cbf7213231e4d6276007cab37 # 01:45 0- 19 0day head guard for 'devel-hourly-2014021821'
git bisect good 7a455ad6947d320cdf0234d07c4e4575b018cc11 # 01:50 69+ 14 Revert "sched/balance: add balance_interval to tuning top level balance frequency"
git bisect good 60f76eab19e3903e810bdc3ec846c158efcd2e21 # 01:55 69+ 22 Merge tag 'dma-buf-for-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/sumits/dma-buf
git bisect good 02d56d4d19b8aa889c856287729d89c805ee42ec # 01:59 69+ 11 Add linux-next specific files for 20140218
Thanks,
Fengguang
View attachment "dmesg-quantal-athens-39:20140218222753:i386-randconfig-an1-02182100:3.14.0-rc3-wl-ath-01897-gd547197:4" of type "text/plain" (183826 bytes)
View attachment "i386-randconfig-an1-02182100-d5471974ffc0bd5cbf7213231e4d6276007cab37-BUG:-MAX_LOCK_DEPTH-too-108380.log" of type "text/plain" (30231 bytes)
View attachment "config-3.14.0-rc3-wl-ath-01897-gd547197" of type "text/plain" (83968 bytes)
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