From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752138AbbDRXXd (ORCPT ); Sat, 18 Apr 2015 19:23:33 -0400 Received: from bh-25.webhostbox.net ([208.91.199.152]:52972 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750930AbbDRXXa (ORCPT ); Sat, 18 Apr 2015 19:23:30 -0400 Date: Sat, 18 Apr 2015 16:23:25 -0700 From: Guenter Roeck To: linux-kernel@vger.kernel.org Cc: Linus Torvalds , Peter Zijlstra , Ingo Molnar Subject: qemu:arm test failure due to commit 8053871d0f7f (smp: Fix smp_call_function_single_async() locking) Message-ID: <20150418232325.GA22411@roeck-us.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) X-Authenticated_sender: guenter@roeck-us.net X-OutGoing-Spam-Status: No, score=-1.0 X-CTCH-PVer: 0000001 X-CTCH-Spam: Unknown X-CTCH-VOD: Unknown X-CTCH-Flags: 0 X-CTCH-RefID: str=0001.0A020205.5532E771.0040,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0 X-CTCH-Score: 0.000 X-CTCH-ScoreCust: 0.000 X-CTCH-Rules: X-CTCH-SenderID: linux@roeck-us.net X-CTCH-SenderID-Flags: 0 X-CTCH-SenderID-TotalMessages: 1 X-CTCH-SenderID-TotalSpam: 0 X-CTCH-SenderID-TotalSuspected: 0 X-CTCH-SenderID-TotalConfirmed: 0 X-CTCH-SenderID-TotalBulk: 0 X-CTCH-SenderID-TotalVirus: 0 X-CTCH-SenderID-TotalRecipients: 0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-Get-Message-Sender-Via: bh-25.webhostbox.net: mailgid no entry from get_relayhosts_entry X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, my qemu test for arm:vexpress fails with the latest upstream kernel. It fails hard - I don't get any output from the console. Bisect points to commit 8053871d0f7f ("smp: Fix smp_call_function_single_async() locking"). Reverting this commit fixes the problem. Please let me know if there is anything I can help to track down the problem. Thanks, Guenter --- bisect log: # bad: [34a984f7b0cc6355a1e0c184251d0d4cc86f44d2] Merge branch 'x86-pmem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip # good: [39a8804455fb23f09157341d3ba7db6d7ae6ee76] Linux 4.0 git bisect start 'HEAD' 'v4.0' # good: [c1c21f4e60ed4523292f1a89ff45a208bddd3849] i2c: core: Export bus recovery functions git bisect good c1c21f4e60ed4523292f1a89ff45a208bddd3849 # good: [e693d73c20ffdb06840c9378f367bad849ac0d5d] parisc: remove use of seq_printf return value git bisect good e693d73c20ffdb06840c9378f367bad849ac0d5d # good: [d19d5efd8c8840aa4f38a6dfbfe500d8cc27de46] Merge tag 'powerpc-4.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux git bisect good d19d5efd8c8840aa4f38a6dfbfe500d8cc27de46 # good: [96d928ed75c4ba4253e82910a697ec7b06ace8b4] Merge tag 'xtensa-20150416' of git://github.com/czankel/xtensa-linux git bisect good 96d928ed75c4ba4253e82910a697ec7b06ace8b4 # good: [e2fdae7e7c5a690b10b2d2891ec819e554dc033d] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc git bisect good e2fdae7e7c5a690b10b2d2891ec819e554dc033d # good: [510965dd4a0a59504ba38455f77339ea8b4c6a70] Merge tag 'gpio-v4.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio git bisect good 510965dd4a0a59504ba38455f77339ea8b4c6a70 # good: [10027551ccf5459cc771c31ac8bc8e5cc8db45f8] f2fs: pass checkpoint reason on roll-forward recovery git bisect good 10027551ccf5459cc771c31ac8bc8e5cc8db45f8 # good: [d6a24d0640d609138a4e40a4ce9fd9fe7859e24c] Merge tag 'docs-for-linus' of git://git.lwn.net/linux-2.6 git bisect good d6a24d0640d609138a4e40a4ce9fd9fe7859e24c # bad: [396c9df2231865ef55aa031e3f5df9d99e036869] Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip git bisect bad 396c9df2231865ef55aa031e3f5df9d99e036869 # good: [7bdb11de8ee4f4ae195e2fa19efd304e0b36c63b] mnt: Factor out unhash_mnt from detach_mnt and umount_tree git bisect good 7bdb11de8ee4f4ae195e2fa19efd304e0b36c63b # good: [e0c9c0afd2fc958ffa34b697972721d81df8a56f] mnt: Update detach_mounts to leave mounts connected git bisect good e0c9c0afd2fc958ffa34b697972721d81df8a56f # bad: [8053871d0f7f67c7efb7f226ef031f78877d6625] smp: Fix smp_call_function_single_async() locking git bisect bad 8053871d0f7f67c7efb7f226ef031f78877d6625 # good: [d7bc3197b41e0a1af6677e83f8736e93a1575ce0] lockdep: Make print_lock() robust against concurrent release git bisect good d7bc3197b41e0a1af6677e83f8736e93a1575ce0 # first bad commit: [8053871d0f7f67c7efb7f226ef031f78877d6625] smp: Fix smp_call_function_single_async() locking --- configuration: # CONFIG_LOCALVERSION_AUTO is not set CONFIG_SYSVIPC=y CONFIG_IKCONFIG=y CONFIG_IKCONFIG_PROC=y CONFIG_LOG_BUF_SHIFT=14 CONFIG_CGROUPS=y CONFIG_CPUSETS=y # CONFIG_UTS_NS is not set # CONFIG_IPC_NS is not set # CONFIG_PID_NS is not set # CONFIG_NET_NS is not set CONFIG_BLK_DEV_INITRD=y CONFIG_PROFILING=y CONFIG_OPROFILE=y CONFIG_MODULES=y CONFIG_MODULE_UNLOAD=y # CONFIG_LBDAF is not set # CONFIG_BLK_DEV_BSG is not set # CONFIG_IOSCHED_DEADLINE is not set # CONFIG_IOSCHED_CFQ is not set CONFIG_ARCH_VEXPRESS=y CONFIG_ARCH_VEXPRESS_CA9X4=y CONFIG_ARCH_VEXPRESS_DCSCB=y CONFIG_ARCH_VEXPRESS_TC2_PM=y CONFIG_SMP=y CONFIG_HAVE_ARM_ARCH_TIMER=y CONFIG_MCPM=y CONFIG_VMSPLIT_2G=y CONFIG_NR_CPUS=8 CONFIG_ARM_PSCI=y CONFIG_AEABI=y CONFIG_CMA=y CONFIG_ZBOOT_ROM_TEXT=0x0 CONFIG_ZBOOT_ROM_BSS=0x0 CONFIG_CMDLINE="console=ttyAMA0" CONFIG_CPU_IDLE=y CONFIG_VFP=y CONFIG_NEON=y # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set CONFIG_NET=y CONFIG_PACKET=y CONFIG_UNIX=y CONFIG_INET=y CONFIG_IP_PNP=y CONFIG_IP_PNP_DHCP=y CONFIG_IP_PNP_BOOTP=y # CONFIG_INET_LRO is not set # CONFIG_IPV6 is not set # CONFIG_WIRELESS is not set CONFIG_NET_9P=y CONFIG_NET_9P_VIRTIO=y CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug" CONFIG_DEVTMPFS=y CONFIG_DEVTMPFS_MOUNT=y CONFIG_MTD=y CONFIG_MTD_CMDLINE_PARTS=y CONFIG_MTD_BLOCK=y CONFIG_MTD_CFI=y CONFIG_MTD_CFI_INTELEXT=y CONFIG_MTD_CFI_AMDSTD=y CONFIG_MTD_PHYSMAP=y CONFIG_MTD_PHYSMAP_OF=y CONFIG_MTD_PLATRAM=y CONFIG_MTD_UBI=y CONFIG_VIRTIO_BLK=y # CONFIG_SCSI_PROC_FS is not set CONFIG_BLK_DEV_SD=y CONFIG_SCSI_VIRTIO=y CONFIG_ATA=y # CONFIG_SATA_PMP is not set CONFIG_NETDEVICES=y CONFIG_VIRTIO_NET=y CONFIG_SMC91X=y CONFIG_SMSC911X=y # CONFIG_WLAN is not set CONFIG_INPUT_EVDEV=y # CONFIG_SERIO_SERPORT is not set CONFIG_SERIO_AMBAKMI=y CONFIG_LEGACY_PTY_COUNT=16 CONFIG_SERIAL_AMBA_PL011=y CONFIG_SERIAL_AMBA_PL011_CONSOLE=y CONFIG_VIRTIO_CONSOLE=y CONFIG_HW_RANDOM=y CONFIG_HW_RANDOM_VIRTIO=y CONFIG_I2C=y CONFIG_I2C_VERSATILE=y CONFIG_SENSORS_VEXPRESS=y CONFIG_REGULATOR=y CONFIG_REGULATOR_VEXPRESS=y CONFIG_FB=y CONFIG_FB_ARMCLCD=y CONFIG_FRAMEBUFFER_CONSOLE=y CONFIG_LOGO=y # CONFIG_LOGO_LINUX_MONO is not set # CONFIG_LOGO_LINUX_VGA16 is not set CONFIG_SOUND=y CONFIG_SND=y CONFIG_SND_MIXER_OSS=y CONFIG_SND_PCM_OSS=y # CONFIG_SND_DRIVERS is not set CONFIG_SND_ARMAACI=y CONFIG_HID_DRAGONRISE=y CONFIG_HID_GYRATION=y CONFIG_HID_TWINHAN=y CONFIG_HID_NTRIG=y CONFIG_HID_PANTHERLORD=y CONFIG_HID_PETALYNX=y CONFIG_HID_SAMSUNG=y CONFIG_HID_SONY=y CONFIG_HID_SUNPLUS=y CONFIG_HID_GREENASIA=y CONFIG_HID_SMARTJOYPLUS=y CONFIG_HID_TOPSEED=y CONFIG_HID_THRUSTMASTER=y CONFIG_HID_ZEROPLUS=y CONFIG_USB=y CONFIG_USB_ANNOUNCE_NEW_DEVICES=y CONFIG_USB_MON=y CONFIG_USB_ISP1760_HCD=y CONFIG_USB_STORAGE=y CONFIG_MMC=y CONFIG_MMC_ARMMMCI=y CONFIG_NEW_LEDS=y CONFIG_LEDS_CLASS=y CONFIG_LEDS_GPIO=y CONFIG_LEDS_TRIGGERS=y CONFIG_LEDS_TRIGGER_HEARTBEAT=y CONFIG_LEDS_TRIGGER_CPU=y CONFIG_RTC_CLASS=y CONFIG_RTC_DRV_PL031=y CONFIG_VIRTIO_BALLOON=y CONFIG_VIRTIO_MMIO=y CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y CONFIG_EXT2_FS=y CONFIG_EXT3_FS=y # CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set # CONFIG_EXT3_FS_XATTR is not set CONFIG_EXT4_FS=y CONFIG_VFAT_FS=y CONFIG_TMPFS=y CONFIG_JFFS2_FS=y CONFIG_UBIFS_FS=y CONFIG_CRAMFS=y CONFIG_SQUASHFS=y CONFIG_SQUASHFS_LZO=y CONFIG_NFS_FS=y CONFIG_ROOT_NFS=y CONFIG_9P_FS=y CONFIG_NLS_CODEPAGE_437=y CONFIG_NLS_ISO8859_1=y CONFIG_DEBUG_INFO=y CONFIG_DEBUG_FS=y CONFIG_MAGIC_SYSRQ=y CONFIG_DEBUG_KERNEL=y CONFIG_DETECT_HUNG_TASK=y # CONFIG_SCHED_DEBUG is not set CONFIG_DEBUG_USER=y # CONFIG_CRYPTO_ANSI_CPRNG is not set # CONFIG_CRYPTO_HW is not set --- qemu command: /opt/buildbot/bin/qemu-system-arm -M vexpress-a9 -kernel arch/arm/boot/zImage \ -drive file=core-image-minimal-qemuarm.ext3,if=sd -no-reboot \ -append "root=/dev/mmcblk0 rw console=ttyAMA0,115200 console=tty1" \ -nographic -dtb arch/arm/boot/dts/vexpress-v2p-ca9.dtb The root file system used in this test is available at http://server.roeck-us.net/qemu/arm/core-image-minimal-qemuarm.ext3 --- Compiler: poky 1.7, arm-poky-linux-gnueabi-gcc (GCC) 4.9.1