FYI, we noticed the below changes on
https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/entry_compat
commit d20b45d05a40ab2900601dca8f6b9b906afb2628 ("x86/entry/64: Fix irqflag tracing wrt context tracking")
+-------------------------+------------+------------+
| | 7df46d0040 | d20b45d05a |
+-------------------------+------------+------------+
| boot_successes | 16 | 0 |
| boot_failures | 0 | 15 |
| BUG:kernel_boot_crashed | 0 | 15 |
+-------------------------+------------+------------+
[ 7.602050] Could not find Carillo Ranch MCH device.
[ 7.603772] no IO addresses supplied
[ 7.605240] hgafb: HGA card not detected.
[ 7.606354] hgafb: probe of hgafb.0 failed with error -22
[ 7.615531] usbcore: registered new interface driver udlfb
[ 7.642312] v86d (121) used greatest stack depth: 13512 bytes left
Elapsed time: 30
BUG: kernel boot crashed
qemu-system-x86_64 -enable-kvm -cpu SandyBridge -kernel /pkg/linux/x86_64-allyesdebian/gcc-5/d20b45d05a40ab2900601dca8f6b9b906afb2628/vmlinuz-4.3.0-rc4-00078-gd20b45d -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-kbuild-yocto-x86_64-24/bisect_boot-1-yocto-minimal-x86_64.cgz-x86_64-allyesdebian-d20b45d05a40ab2900601dca8f6b9b906afb2628-20151107-100536-1ihp33n-0.yaml ARCH=x86_64 kconfig=x86_64-allyesdebian branch=linux-devel/devel-catchup-201511061516 commit=d20b45d05a40ab2900601dca8f6b9b906afb2628 BOOT_IMAGE=/pkg/linux/x86_64-allyesdebian/gcc-5/d20b45d05a40ab2900601dca8f6b9b906afb2628/vmlinuz-4.3.0-rc4-00078-gd20b45d max_uptime=600 RESULT_ROOT=/result/boot/1/vm-kbuild-yocto-x86_64/yocto-minimal-x86_64.cgz/x86_64-allyesdebian/gcc-5/d20b45d05a40ab2900601dca8f6b9b906afb2628/0 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-kbuild-yocto-x86_64-24::dhcp drbd.minor_count=8' -initrd /fs/sdh1/initrd-vm-kbuild-yocto-x86_64-24 -m 832 -smp 1 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -drive file=/fs/sdh1/disk0-vm-kbuild-yocto-x86_64-24,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-vm-kbuild-yocto-x86_64-24 -serial file:/dev/shm/kboot/serial-vm-kbuild-yocto-x86_64-24 -daemonize -display none -monitor null
Thanks,
Ying Huang