10:46 p.m.
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
git://git.infradead.org/users/willy/linux-dax.git waiter-diet
commit 32a8118b39b6bf2dad19bac66442e1d6a99fa4b6
Author: Matthew Wilcox <mawilcox(a)microsoft.com>
AuthorDate: Fri Feb 10 22:35:12 2017 -0500
Commit: Matthew Wilcox <mawilcox(a)microsoft.com>
CommitDate: Fri Feb 10 22:35:12 2017 -0500
Shrink mutex by one pointer
Instead of embedding a list_head in the mutex, store a pointer to the
first waiter. The waiters continue to be linked to each other through
a list_head, allowing for O(1) deletion from the middle, removal from
the beginning and addition to the end. struct file shrinks by 8 bytes,
as does struct device, and struct cgroup. The superblock shrinks by 16
bytes because it has two mutexes.
Signed-off-by: Matthew Wilcox <mawilcox(a)microsoft.com>
+--------------------------------------------------------------------------+------------+------------+------------+
| | 54b4bd3f9f |
32a8118b39 | 5a5778a8f7 |
+--------------------------------------------------------------------------+------------+------------+------------+
| boot_successes | 82 |
0 | 0 |
| boot_failures | 662 |
194 | 29 |
| INFO:task_blocked_for_more_than#seconds | 222 |
10 | 4 |
| Kernel_panic-not_syncing:hung_task:blocked_tasks | 220 |
10 | 1 |
| calltrace:SyS_mprotect | 3 |
| |
| BUG:kernel_reboot-without-warning_in_test_stage | 2 |
| |
| calltrace:SyS_munmap | 1 |
| |
| invoked_oom-killer:gfp_mask=0x | 2 |
| |
| Mem-Info | 2 |
| |
| page_allocation_failure:order:#,mode:#(GFP_KERNEL|__GFP_NORETRY) | 1 |
| |
| calltrace:SyS_sethostname | 1 |
| |
| BUG:kernel_hang_in_test_stage | 1 |
2 | 4 |
| Kernel_panic-not_syncing:Attempted_to_kill_init!exitcode= | 436 |
115 | 4 |
| WARNING:at_kernel/locking/mutex-debug.c:#debug_mutex_wake_waiter | 0 |
64 | 20 |
| BUG:unable_to_handle_kernel | 0 |
64 | 19 |
| Oops | 0 |
64 | 20 |
| Kernel_panic-not_syncing:Fatal_exception | 0 |
67 | 20 |
| BUG:sleeping_function_called_from_invalid_context_at_arch/x86/mm/fault.c | 0 |
34 | 11 |
| INFO:lockdep_is_turned_off | 0 |
34 | 11 |
| kernel_BUG_at_lib/list_debug.c | 0 |
3 | |
| invalid_opcode:#[##]SMP | 0 |
3 | |
| WARNING:at_kernel/sched/sched.h:#assert_clock_updated | 0 |
0 | 6 |
+--------------------------------------------------------------------------+------------+------------+------------+
Please wait: booting...
Starting udev
[ 2.581193] ------------[ cut here ]------------
[ 2.582206] WARNING: CPU: 0 PID: 362 at kernel/locking/mutex-debug.c:42
debug_mutex_wake_waiter+0x249/0x250
[ 2.584253] DEBUG_LOCKS_WARN_ON(list_empty(&waiter->list))
[ 2.584255] Modules linked in:
[ 2.585673] CPU: 0 PID: 362 Comm: udevd Not tainted 4.10.0-rc5-00370-g32a8118 #2
[ 2.586833] Call Trace:
[ 2.587244] show_stack+0x6a/0x6c
[ 2.587772] dump_stack+0xc5/0x128
[ 2.588319] ? debug_mutex_wake_waiter+0x249/0x250
git bisect start 5a5778a8f7c3f71ab4515a3f22ec1c046edfe929
d5adbfcd5f7bcc6fa58a41c5c5ada0e5c826ce2c --
git bisect bad c851a34706e18df7364b853b7aa0954d65883c99 # 14:34 14- 21 Merge
'linux-review/Scott-Bauer/uapi-sed-opal-fix-IOW-for-activate-lsp-to-use-correct-struct/20170211-024911'
into devel-spot-201702111217
git bisect bad 36b01a3b87bfa85ad341ae93e226abf35e03f567 # 14:57 28- 37 Merge
'linux-review/Christophe-JAILLET/serial-efm32-Fix-parity-management-in-efm32_uart_console_get_options/20170211-054812'
into devel-spot-201702111217
git bisect bad e97007f9a376a6c56286a2a59804644d85a3915d # 15:17 32- 34 Merge
'linux-review/Nathan-Fontenot/ibmvnic-Initialize-completion-variables-before-starting-work/20170211-075936'
into devel-spot-201702111217
git bisect bad 41acc5df7e90c4a1d0a2411d3863ec91397afd79 # 15:40 2- 37 Merge
'btrfs/for-linus-4.10' into devel-spot-201702111217
git bisect bad 99d50a786610bd9ca97ebe65ee03fdb7eafc107b # 16:00 12- 17 Merge
'linux-review/yuan-linyu/net-remove-member-max-of-struct-scm_fp_list/20170211-114932'
into devel-spot-201702111217
git bisect good 8e15883fed03308c8ef04d36ffd8a86f99c4bb24 # 16:21 182+ 99 0day
base guard for 'devel-spot-201702111217'
git bisect bad 11580e4780c00534ebc3f10daf310740c7392d9e # 16:41 36- 70 Merge
'dax/waiter-diet' into devel-spot-201702111217
git bisect good 54b4bd3f9ff6594858117794724debcc3b789324 # 17:03 190+ 163 Shrink
semaphore by one pointer
git bisect bad 32a8118b39b6bf2dad19bac66442e1d6a99fa4b6 # 17:18 29- 42 Shrink
mutex by one pointer
# first bad commit: [32a8118b39b6bf2dad19bac66442e1d6a99fa4b6] Shrink mutex by one
pointer
git bisect good 54b4bd3f9ff6594858117794724debcc3b789324 # 17:31 543+ 655 Shrink
semaphore by one pointer
# extra tests with CONFIG_DEBUG_INFO_REDUCED
git bisect bad 32a8118b39b6bf2dad19bac66442e1d6a99fa4b6 # 17:56 0- 17 Shrink
mutex by one pointer
# extra tests on HEAD of linux-devel/devel-spot-201702111217
git bisect bad 5a5778a8f7c3f71ab4515a3f22ec1c046edfe929 # 17:56 0- 29 0day
head guard for 'devel-spot-201702111217'
# extra tests on tree/branch dax/waiter-diet
git bisect bad 32a8118b39b6bf2dad19bac66442e1d6a99fa4b6 # 17:56 0- 194 Shrink
mutex by one pointer
# extra tests with first bad commit reverted
git bisect good 45dae970bcf69879d60d7a4f9724011bc59487ac # 18:23 540+ 509 Revert
"Shrink mutex by one pointer"
# extra tests on tree/branch linus/master
git bisect good 1ee18329fae936089c6c599250ae92482ff2b81f # 18:58 550+ 315 Merge
git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
# extra tests on tree/branch linux-next/master
git bisect good 632571b1bee00494aef749512d9f3290dfba0ead # 19:43 550+ 474 Add
linux-next specific files for 20170210
---
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