FYI, we noticed the following commit:
git://git.infradead.org/users/willy/linux-dax.git idr-2016-04-25
commit dbb5d8f2adff4465b3ff4d9bae970e01f9eb7940 ("Reimplement IDR and IDA using the
radix tree")
on test machine: vm-lkp-wsx03-quantal-x86_64: 2 threads qemu-system-x86_64 -enable-kvm
-cpu Haswell,+smep,+smap with 360M memory
caused below changes:
+------------------------------------------+------------+------------+
| | 411ca2f674 | dbb5d8f2ad |
+------------------------------------------+------------+------------+
| boot_successes | 6 | 0 |
| boot_failures | 0 | 7 |
| BUG:unable_to_handle_kernel | 0 | 7 |
| Oops | 0 | 7 |
| RIP:ida_simple_get | 0 | 7 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 7 |
+------------------------------------------+------------+------------+
[ 0.144964]
[ 0.145224] Mount-cache hash table entries: 1024 (order: 1, 8192 bytes)
[ 0.146039] Mountpoint-cache hash table entries: 1024 (order: 1, 8192 bytes)
[ 0.146869] BUG: unable to handle kernel paging request at 0000000082403e5c
[ 0.147696] IP: [<ffffffff813f3e0f>] ida_simple_get+0x69/0xae
[ 0.148370] PGD 0
[ 0.148622] Oops: 0000 [#1] PREEMPT SMP
[ 0.149097] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.6.0-rc2-00066-gdbb5d8f #1
[ 0.149954] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1
04/01/2014
[ 0.150887] task: ffffffff82412500 ti: ffffffff82400000 task.ti: ffffffff82400000
[ 0.151683] RIP: 0010:[<ffffffff813f3e0f>] [<ffffffff813f3e0f>]
ida_simple_get+0x69/0xae
[ 0.152554] RSP: 0000:ffffffff82403e50 EFLAGS: 00010046
[ 0.153097] RAX: 0000000000000000 RBX: ffff8800000820d0 RCX: ffffffff82403e40
[ 0.154062] RDX: ffff8800000820d8 RSI: 0000000000000001 RDI: ffff8800000820d0
[ 0.154931] RBP: 0000000082403e88 R08: 0000000000000001 R09: 0000000000000037
[ 0.155814] R10: ffffffff82403e50 R11: 0000000000000000 R12: 0000000000000001
[ 0.156684] R13: 00000000024000c0 R14: 0000000080000000 R15: 0000000000000202
[ 0.157550] FS: 0000000000000000(0000) GS:ffff880013c00000(0000)
knlGS:0000000000000000
[ 0.158599] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.159294] CR2: 0000000082403e5c CR3: 000000000240b000 CR4: 00000000000006b0
[ 0.160177] Stack:
[ 0.160443] 0000000000000000 ffffffff82403e88 ffff88000002f000 ffffffff8230ec72
[ 0.161418] ffff8800000820c0 0000000000000001 000000000000416d ffffffff82403ec0
[ 0.162443] ffffffff811ad167 ffff8800000820c0 fffffffffffffff4 0000000000000002
[ 0.163408] Call Trace:
[ 0.163718] [<ffffffff811ad167>] ? __kernfs_new_node+0x5b/0xb7
[ 0.164443] [<ffffffff811ae874>] ? kernfs_create_root+0x7c/0xec
[ 0.165174] [<ffffffff8277070a>] ? sysfs_init+0x13/0x51
[ 0.165894] [<ffffffff8276fbe4>] ? mnt_init+0xf6/0x1f8
[ 0.166552] [<ffffffff8276f934>] ? vfs_caches_init+0x5f/0x6b
[ 0.167256] [<ffffffff8274beff>] ? start_kernel+0x47c/0x4da
[ 0.167950] [<ffffffff8274b120>] ? early_idt_handler_array+0x120/0x120
[ 0.168756] [<ffffffff8274b2f6>] ? x86_64_start_reservations+0x2a/0x2c
[ 0.169563] [<ffffffff8274b3de>] ? x86_64_start_kernel+0xe6/0xf3
[ 0.170357] Code: e8 bf 4a 00 00 85 c0 74 55 48 c7 c7 20 b9 45 82 e8 a0 48 89 00 48 8d
55 d4 44 89 e6 48 89 df 49 89 c7 e8 04 4b 00 00 85 c0 75 17 <8b> 45 d4 41 39 c6 73
0f 89 c6 48 89 df e8 16 4c 00 00 b8 e4 ff
[ 0.173783] RIP [<ffffffff813f3e0f>] ida_simple_get+0x69/0xae
[ 0.174520] RSP <ffffffff82403e50>
[ 0.174946] CR2: 0000000082403e5c
[ 0.175361] ---[ end trace f4b42fa6fb26a58c ]---
[ 0.175931] Kernel panic - not syncing: Fatal exception
FYI, raw QEMU command line is:
qemu-system-x86_64 -enable-kvm -cpu Haswell,+smep,+smap -kernel
/pkg/linux/x86_64-acpi-redef/gcc-5/dbb5d8f2adff4465b3ff4d9bae970e01f9eb7940/vmlinuz-4.6.0-rc2-00066-gdbb5d8f
-append 'root=/dev/ram0 user=lkp
job=/lkp/scheduled/vm-lkp-wsx03-quantal-x86_64-1/bisect_boot-1-quantal-core-x86_64.cgz-x86_64-acpi-redef-dbb5d8f2adff4465b3ff4d9bae970e01f9eb7940-20160426-86997-t5gvxe-0.yaml
ARCH=x86_64 kconfig=x86_64-acpi-redef branch=linux-devel/devel-catchup-201604260608
commit=dbb5d8f2adff4465b3ff4d9bae970e01f9eb7940
BOOT_IMAGE=/pkg/linux/x86_64-acpi-redef/gcc-5/dbb5d8f2adff4465b3ff4d9bae970e01f9eb7940/vmlinuz-4.6.0-rc2-00066-gdbb5d8f
max_uptime=600
RESULT_ROOT=/result/boot/1/vm-lkp-wsx03-quantal-x86_64/quantal-core-x86_64.cgz/x86_64-acpi-redef/gcc-5/dbb5d8f2adff4465b3ff4d9bae970e01f9eb7940/0
LKP_SERVER=inn 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 rw ip=::::vm-lkp-wsx03-quantal-x86_64-1::dhcp
drbd.minor_count=8' -initrd /fs/sdc1/initrd-vm-lkp-wsx03-quantal-x86_64-1 -m 360 -smp
2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog
i6300esb -rtc base=localtime -pidfile /dev/shm/kboot/pid-vm-lkp-wsx03-quantal-x86_64-1
-serial file:/dev/shm/kboot/serial-vm-lkp-wsx03-quantal-x86_64-1 -daemonize -display none
-monitor null
Thanks,
Kernel Test Robot