Greetings, 0day kernel testing robot got the below dmesg and the first bad commit is git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next commit 634439ebf9a012722cbc489ac55fb9f37f70a962 Author: Stephen Rothwell <sfr(a)canb.auug.org.au&gt; AuthorDate: Tue Sep 8 15:17:07 2015 +1000 Commit: Stephen Rothwell <sfr(a)canb.auug.org.au&gt; CommitDate: Tue Sep 8 15:17:07 2015 +1000 Add linux-next specific files for 20150908 Signed-off-by: Stephen Rothwell <sfr(a)canb.auug.org.au&gt; Usage: create-matrix -o matrix_file stats_files... options: -o, --output FILE save matrix to FILE -t, --table show as table -n, --no-source don't add field for tracking data source files -h, --help show this message [ 0.540740] smpboot: Total of 2 processors activated (10778.94 BogoMIPS) [ 0.543970] ------------[ cut here ]------------ [ 0.543970] ------------[ cut here ]------------ [ 0.544689] WARNING: CPU: 1 PID: 20 at kernel/locking/lockdep.c:3382 lock_release+0xd3/0x468() [ 0.544689] WARNING: CPU: 1 PID: 20 at kernel/locking/lockdep.c:3382 lock_release+0xd3/0x468() [ 0.546239] DEBUG_LOCKS_WARN_ON(depth <= 0) [ 0.546239] DEBUG_LOCKS_WARN_ON(depth <= 0) [ 0.546826] Modules linked in: [ 0.546826] Modules linked in: [ 0.547327] CPU: 1 PID: 20 Comm: pgdatinit0 Not tainted 4.2.0-rc2-00078-g9ca678d #59 [ 0.547327] CPU: 1 PID: 20 Comm: pgdatinit0 Not tainted 4.2.0-rc2-00078-g9ca678d #59 [ 0.548483] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014 [ 0.548483] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014 [ 0.550028] 00000001 [ 0.550028] 00000001 00000000 00000000 00000001 00000001 80181e38 80181e38 817461b8 817461b8 80181e64 80181e64 00000001 00000001 81ab6c7b 81ab6c7b [ 0.551245] 80181e54 [ 0.551245] 80181e54 8106b912 8106b912 00000d36 00000d36 810c0cbf 810c0cbf 81e6ca72 81e6ca72 81c12b00 81c12b00 80162800 80162800 80181e6c 80181e6c [ 0.552492] 8106b954 [ 0.552492] 8106b954 00000009 00000009 80181e64 80181e64 81ab6949 81ab6949 80181e80 80181e80 80181ebc 80181ebc 810c0cbf 810c0cbf 81ab6c7b 81ab6c7b [ 0.553829] Call Trace: [ 0.553829] Call Trace: [ 0.554193] [<817461b8>] dump_stack+0x7b/0xf0 [ 0.554193] [<817461b8>] dump_stack+0x7b/0xf0 [ 0.554863] [<8106b912>] warn_slowpath_common+0xb7/0xce [ 0.554863] [<8106b912>] warn_slowpath_common+0xb7/0xce [ 0.555633] [<810c0cbf>] ? lock_release+0xd3/0x468 [ 0.555633] [<810c0cbf>] ? lock_release+0xd3/0x468 [ 0.556405] [<81e6ca72>] ? deferred_init_memmap+0x4f/0x4e2 [ 0.556405] [<81e6ca72>] ? deferred_init_memmap+0x4f/0x4e2 [ 0.557272] [<8106b954>] warn_slowpath_fmt+0x2b/0x2f [ 0.557272] [<8106b954>] warn_slowpath_fmt+0x2b/0x2f [ 0.558039] [<810c0cbf>] lock_release+0xd3/0x468 [ 0.558039] [<810c0cbf>] lock_release+0xd3/0x468 [ 0.558714] [<8109e6d9>] ? preempt_count_sub+0x9/0x5e [ 0.558714] [<8109e6d9>] ? preempt_count_sub+0x9/0x5e [ 0.559461] [<8174ff71>] ? _raw_spin_unlock_irq+0x62/0x7e [ 0.559461] [<8174ff71>] ? _raw_spin_unlock_irq+0x62/0x7e [ 0.560269] [<81098507>] ? finish_task_switch+0x130/0x231 [ 0.560269] [<81098507>] ? finish_task_switch+0x130/0x231 [ 0.561073] [<81e6ca23>] ? deferred_free_range+0x83/0x83 [ 0.561073] [<81e6ca23>] ? deferred_free_range+0x83/0x83 [ 0.561866] [<810bd482>] up_read+0x1b/0x2e [ 0.561866] [<810bd482>] up_read+0x1b/0x2e [ 0.562472] [<81e6ca72>] deferred_init_memmap+0x4f/0x4e2 [ 0.562472] [<81e6ca72>] deferred_init_memmap+0x4f/0x4e2 [ 0.563282] [<81748a29>] ? __schedule+0xda2/0x1705 [ 0.563282] [<81748a29>] ? __schedule+0xda2/0x1705 [ 0.564024] [<81e6ca23>] ? deferred_free_range+0x83/0x83 [ 0.564024] [<81e6ca23>] ? deferred_free_range+0x83/0x83 [ 0.564838] [<8109e716>] ? preempt_count_sub+0x46/0x5e [ 0.564838] [<8109e716>] ? preempt_count_sub+0x46/0x5e [ 0.565693] [<8108f58b>] ? __kthread_parkme+0xb/0xa7 [ 0.565693] [<8108f58b>] ? __kthread_parkme+0xb/0xa7 [ 0.566444] [<81e6ca23>] ? deferred_free_range+0x83/0x83 [ 0.566444] [<81e6ca23>] ? deferred_free_range+0x83/0x83 [ 0.567240] [<8108f8fe>] kthread+0xfb/0x100 [ 0.567240] [<8108f8fe>] kthread+0xfb/0x100 [ 0.567923] [<81750c41>] ret_from_kernel_thread+0x21/0x30 [ 0.567923] [<81750c41>] ret_from_kernel_thread+0x21/0x30 [ 0.568755] [<8108f803>] ? kthread_create_on_node+0x1dc/0x1dc [ 0.568755] [<8108f803>] ? kthread_create_on_node+0x1dc/0x1dc [ 0.569656] ---[ end trace b3383dba5e0fdd25 ]--- [ 0.569656] ---[ end trace b3383dba5e0fdd25 ]--- git bisect bad 9ca678d1dff610f7df6ac9b31fd9152c4426f815 # 19:20 0- 13 Merge branches 'pci/enumeration' and 'pci/misc' into next git bisect bad bc0195aad0daa2ad5b0d76cce22b167bc3435590 # 19:32 0- 8 Linux 4.2-rc2 # extra tests on tree/branch linus/master git bisect good 4e4adb2f462889b9eac736dd06d60658beb091b6 # 19:44 21+ 0 Merge tag 'nfs-for-4.3-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs # extra tests on tree/branch linux-next/master git bisect good 634439ebf9a012722cbc489ac55fb9f37f70a962 # 19:56 20+ 0 Add linux-next specific files for 20150908 This script may reproduce the error. ---------------------------------------------------------------------------- #!/bin/bash kernel=$1 initrd=quantal-core-i386.cgz wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd kvm=( qemu-system-x86_64 -enable-kvm -cpu kvm64 -kernel $kernel -initrd $initrd -m 300 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -serial stdio -display none -monitor null ) append=( hung_task_panic=1 earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal root=/dev/ram0 rw drbd.minor_count=8 ) "${kvm[@]}" --append "${append[*]}" ---------------------------------------------------------------------------- --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/lkp Intel Corporation