Hi Alan, 0day kernel testing robot got the below dmesg and the first bad commit is git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git staging-next commit 9b17aeec232a5f0a61ce3952c2e728a0eeddda8b Author: Alan AuthorDate: Mon May 12 16:55:35 2014 +0100 Commit: Greg Kroah-Hartman CommitDate: Thu May 15 13:19:01 2014 -0700 goldfish: Allow 64bit builds We can now enable the 64bit option for the Goldfish 64bit emulator. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman +----------------------------------------------------------+------------+------------+ | | b8658bc810 | 9b17aeec23 | +----------------------------------------------------------+------------+------------+ | boot_successes | 60 | 0 | | boot_failures | 0 | 20 | | genirq:Flags_mismatch_irq.(serial)vs.(goldfish_pdev_bus) | 0 | 20 | +----------------------------------------------------------+------------+------------+ [ 8.668148] ALSA device list: [ 8.668419] #0: Loopback 1 [ 8.668677] #1: MTPAV on parallel port at 0x378 [ 8.669432] genirq: Flags mismatch irq 4. 00000000 (serial) vs. 00000080 (goldfish_pdev_bus) [ 8.671901] Freeing unused kernel memory: 1196K (ffffffff82bf0000 - ffffffff82d1b000) [ 8.672607] Write protecting the kernel read-only data: 18432k [ 8.673681] Freeing unused kernel memory: 80K (ffff880001bec000 - ffff880001c00000) [ 8.677081] Freeing unused kernel memory: 1076K (ffff8800020f3000 - ffff880002200000) [ 8.678569] genirq: Flags mismatch irq 4. 00000000 (serial) vs. 00000080 (goldfish_pdev_bus) [ 8.679593] genirq: Flags mismatch irq 4. 00000000 (serial) vs. 00000080 (goldfish_pdev_bus) [ 8.680682] genirq: Flags mismatch irq 4. 00000000 (serial) vs. 00000080 (goldfish_pdev_bus) [ 8.681640] genirq: Flags mismatch irq 4. 00000000 (serial) vs. 00000080 (goldfish_pdev_bus) [ 8.682609] genirq: Flags mismatch irq 4. 00000000 (serial) vs. 00000080 (goldfish_pdev_bus) [ 8.684017] genirq: Flags mismatch irq 4. 00000000 (serial) vs. 00000080 (goldfish_pdev_bus) [ 8.685239] genirq: Flags mismatch irq 4. 00000000 (serial) vs. 00000080 (goldfish_pdev_bus) [ 8.692514] genirq: Flags mismatch irq 4. 00000000 (serial) vs. 00000080 (goldfish_pdev_bus) [ 8.693570] genirq: Flags mismatch irq 4. 00000000 (serial) vs. 00000080 (goldfish_pdev_bus) [ 8.694499] genirq: Flags mismatch irq 4. 00000000 (serial) vs. 00000080 (goldfish_pdev_bus) [ 8.765477] gfs2: path_lookup on rootfs returned error -2 [ 60.373367] spin_lock-torture: Writes: Total: 4 Max/Min: 0/0 Fail: 0 [ 69.215881] random: nonblocking pool is initialized git bisect start 0856ad1ef175c45dc6a0bc629ca355fdfbb1001e v3.14 -- git bisect good 200bde278d78318cbd10cd865f94016924e76c56 # 16:16 20+ 0 Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip git bisect good 9ae8df66e6742271b49a1518c7bf0debdfc523cf # 16:32 20+ 0 Merge remote-tracking branch 'devicetree-current/devicetree/merge' git bisect good 77645accb67841c8557483afe029ec80a240d636 # 16:39 20+ 0 Merge remote-tracking branch 'drm/drm-next' git bisect good 21dd17170d63646851debe993194e46811dbdb1b # 16:47 20+ 0 Merge remote-tracking branch 'ftrace/for-next' git bisect good 2fa6c75b02c032252eaf3c0b8885ddb1b9ad4840 # 16:55 20+ 0 Merge remote-tracking branch 'usb-gadget/next' git bisect bad 7dc48a5c223dddebc2bb263d6e77edb557c11f6f # 17:00 0- 7 Merge remote-tracking branch 'dma-mapping/dma-mapping-next' git bisect bad a75b5bfa061c14e14261aed3771e2b174df72450 # 17:09 0- 8 Merge remote-tracking branch 'cgroup/for-next' git bisect bad 47bb948ff65de22da21d235cc768bba7802ad45f # 17:15 0- 12 Merge remote-tracking branch 'staging/staging-next' git bisect good d5cef008e95ffdaf457e38254e67d145a927df96 # 17:25 20+ 0 Merge tag 'iio-for-3.16a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next git bisect good a1f3b3fdba2ab124c1e8c2b6aa17cfcf5c99d756 # 17:34 20+ 0 staging: rtl8188eu: Remove 'u32 ref_cnt' from struct recv_buf git bisect good be4c50604d22f0fd2c65853af18292f44d784b86 # 17:45 20+ 0 staging: rtl8723au: Eliminate RTW_STATUS_CODE23a() git bisect bad 2b46be68a1b67f40df4f288b90e79181c387eda6 # 17:53 0- 8 staging: dgnc: cleanup dgnc_finalize_board_init() git bisect good c7fff4e43ced0584bcbcef8a5f93bd9a813aac1b # 18:01 20+ 0 staging: rtl8723au: struct phy_info and struct odm_phy_info are identical git bisect bad f6279717bbb20bf90ec414af17d2a31d843f5eb5 # 18:12 0- 10 goldfish: clean up staging ifdefs git bisect good 0cc6c3ab3cdbcf8a4a103d27599a6d0b44a6c315 # 18:18 20+ 0 staging: rtl8723au: Remove unused pointer in rtw_wdev_free() git bisect good f10d8434201859d5ad7f51032dcd2d0c09e85ee2 # 18:25 20+ 0 goldfish: add support for 64bit to the virtual bus git bisect good b8658bc81089d656fe54b12e21f0cae5116b6483 # 18:33 20+ 0 goldfish: enable 64-bit tty driver git bisect bad 9b17aeec232a5f0a61ce3952c2e728a0eeddda8b # 18:39 0- 9 goldfish: Allow 64bit builds # first bad commit: [9b17aeec232a5f0a61ce3952c2e728a0eeddda8b] goldfish: Allow 64bit builds git bisect good b8658bc81089d656fe54b12e21f0cae5116b6483 # 18:41 60+ 0 goldfish: enable 64-bit tty driver git bisect bad 4151fa6adc65da14673ece623bbb2acc6936f8be # 18:41 0- 13 Add linux-next specific files for 20140516 git bisect good 14186fea0cb06bc43181ce239efe0df6f1af260a # 18:48 60+ 0 Merge tag 'locks-v3.15-4' of git://git.samba.org/jlayton/linux git bisect bad 4151fa6adc65da14673ece623bbb2acc6936f8be # 18:48 0- 13 Add linux-next specific files for 20140516 This script may reproduce the error. ----------------------------------------------------------------------------- #!/bin/bash kernel=$1 initrd=yocto-minimal-x86_64.cgz wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/blob/master/initrd/$initrd kvm=( qemu-system-x86_64 -cpu kvm64 -enable-kvm -kernel $kernel -initrd $initrd -smp 2 -m 256M -net nic,vlan=0,macaddr=00:00:00:00:00:00,model=virtio -net user,vlan=0 -net nic,vlan=1,model=e1000 -net user,vlan=1 -boot order=nc -no-reboot -watchdog i6300esb -serial stdio -display none -monitor null ) append=( debug sched_debug apic=debug ignore_loglevel sysrq_always_enabled panic=10 prompt_ramdisk=0 earlyprintk=ttyS0,115200 console=ttyS0,115200 console=tty0 vga=normal root=/dev/ram0 rw ) "${kvm[@]}" --append "${append[*]}" ----------------------------------------------------------------------------- Thanks, Jet