ci starts bisection 2024-10-13 04:51:54.203109568 +0000 UTC m=+100517.266103901 bisecting fixing commit since 8a3f14bb1e944f496d1a16096435ddb2e12e4753 building syzkaller on 9750182a9a67f35e95cb1e077a3b69a4a9b54083 ensuring issue is reproducible on original commit 8a3f14bb1e944f496d1a16096435ddb2e12e4753 testing commit 8a3f14bb1e944f496d1a16096435ddb2e12e4753 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 447fc973c9499648f48cc2ded626ee95494a5517565556edab373ee679a8d009 all runs: crashed: possible deadlock in kernfs_path_from_node representative crash: possible deadlock in kernfs_path_from_node, types: [LOCKDEP] check whether we can drop unnecessary instrumentation disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit 8a3f14bb1e944f496d1a16096435ddb2e12e4753 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 660aedc27bc3a6659a4af8340ff37518f70a3cd8e5aed99647509f0f04d47743 all runs: OK false negative chance: 0.000 kconfig minimization: base=4045 full=8138 leaves diff=2108 split chunks (needed=false): <2108> split chunk #0 of len 2108 into 5 parts testing without sub-chunk 1/5 testing commit 8a3f14bb1e944f496d1a16096435ddb2e12e4753 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f03b7498a609b96ccf5e287f19857cd6c84f7f0dbec8c207beb451c5ad2223cf all runs: crashed: possible deadlock in kernfs_path_from_node representative crash: possible deadlock in kernfs_path_from_node, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 2/5 testing commit 8a3f14bb1e944f496d1a16096435ddb2e12e4753 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0a766bf37a15d2c09b3999d9d4ae60ea846990b2c0648c2e8a9f1e25bb1fc6af all runs: crashed: possible deadlock in kernfs_path_from_node representative crash: possible deadlock in kernfs_path_from_node, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 3/5 testing commit 8a3f14bb1e944f496d1a16096435ddb2e12e4753 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5a64065408d39e83677e3ddbbf001322a0e26c43652b7954832831a40cc06744 all runs: crashed: possible deadlock in kernfs_path_from_node representative crash: possible deadlock in kernfs_path_from_node, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 4/5 testing commit 8a3f14bb1e944f496d1a16096435ddb2e12e4753 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f5cd2cd9b19fb5892b890a1453d9fae8f453439821f6d7f19ee6d2719cf6615f all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 testing commit 8a3f14bb1e944f496d1a16096435ddb2e12e4753 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 failed building 8a3f14bb1e944f496d1a16096435ddb2e12e4753: drivers/gpu/drm/bridge/aux-bridge.c:115: undefined reference to `devm_drm_of_get_bridge' minimized to 842 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 BCMA BLK_DEV_ZONED BPF_SYSCALL BT BT_BREDR BT_HIDP BXT_WC_PMIC_OPREGION CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_ZSTD DAX DLM DRM DVB_CORE ENCRYPTED_KEYS EXTCON FB GENEVE GPIOLIB HAMRADIO HAVE_CLK HAVE_ZSMALLOC HID_NVIDIA_SHIELD HID_PLAYSTATION HID_SENSOR_HUB HID_SMARTJOYPLUS HID_STEAM HID_THRUSTMASTER HID_ZEROPLUS I2C_MUX IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN INTEL_SCU_IPC INTEL_SOC_PMIC_BXTWC IOMMUFD IP_SCTP IRQ_REMAP KVM KVM_INTEL L2TP LEDS_CLASS_MULTICOLOR LIBNVDIMM MAC80211 MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_COMMON_OPTIONS MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_PLATFORM_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_INTEL_PMC_BXT MFD_MT6360 MFD_MT6370 MFD_RETU MFD_VIPERBOARD MMC MTD MTD_UBI NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NLS_CODEPAGE_863 NLS_CODEPAGE_864 NLS_CODEPAGE_865 NLS_CODEPAGE_866 NLS_CODEPAGE_869 NLS_CODEPAGE_874 NLS_CODEPAGE_932 NLS_CODEPAGE_936 NLS_CODEPAGE_949 NLS_CODEPAGE_950 NLS_ISO8859_13 NLS_ISO8859_14 NLS_ISO8859_15 NLS_ISO8859_2 NLS_ISO8859_3 NLS_ISO8859_4 NLS_ISO8859_5 NLS_ISO8859_6 NLS_ISO8859_7 NLS_ISO8859_8 NLS_ISO8859_9 NLS_KOI8_R NLS_KOI8_U NLS_MAC_CELTIC NLS_MAC_CENTEURO NLS_MAC_CROATIAN NLS_MAC_CYRILLIC NLS_MAC_GAELIC NLS_MAC_GREEK NLS_MAC_ICELAND NLS_MAC_INUIT NLS_MAC_ROMAN NLS_MAC_ROMANIAN NLS_MAC_TURKISH NLS_UCS2_UTILS NOP_USB_XCEIV NOZOMI NTFS3_FS NTFS3_FS_POSIX_ACL NTFS3_LZX_XPRESS NULL_TTY NUMA_BALANCING NUMA_BALANCING_DEFAULT_ENABLED NUMA_EMU NUMA_KEEP_MEMINFO NVDIMM_DAX NVDIMM_KEYS NVDIMM_PFN NVIDIA_SHIELD_FF NVME_CORE NVME_FABRICS NVME_FC NVME_MULTIPATH NVME_RDMA NVME_TARGET NVME_TARGET_FC NVME_TARGET_FCLOOP NVME_TARGET_LOOP NVME_TARGET_RDMA NVME_TARGET_TCP NVME_TCP N_GSM N_HDLC OCFS2_DEBUG_FS OCFS2_FS OCFS2_FS_O2CB OCFS2_FS_STATS OCFS2_FS_USERSPACE_CLUSTER OF_GPIO OF_PMEM OMFS_FS OPENVSWITCH OPENVSWITCH_GENEVE OPENVSWITCH_GRE OPENVSWITCH_VXLAN ORANGEFS_FS OSF_PARTITION OVERLAY_FS OVERLAY_FS_DEBUG OVERLAY_FS_INDEX OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW OVERLAY_FS_REDIRECT_DIR PACKET_DIAG PAGE_IDLE_FLAG PAGE_POOL PAGE_REPORTING PAHOLE_HAS_BTF_TAG PAHOLE_HAS_LANG_EXCLUDE PAHOLE_HAS_SPLIT_BTF PARPORT PARPORT_NOT_PC PARTITION_ADVANCED PCCARD PCCARD_NONSTATIC PCIEAER PCI_ENDPOINT PCI_IOV PCMCIA PCMCIA_LOAD_CIS PERCPU_STATS PERSISTENT_KEYRINGS PHONET PHYLINK PHY_CPCAP_USB PHY_QCOM_USB_HS PHY_QCOM_USB_HSIC PHY_SAMSUNG_USB2 PHY_TUSB1210 PKCS7_TEST_KEY PKCS8_PRIVATE_KEY_PARSER PLAYSTATION_FF PLFXLC PMIC_OPREGION PM_CLK PNFS_BLOCK PNFS_FILE_LAYOUT PNFS_FLEXFILE_LAYOUT PPP PPPOATM PPPOE PPPOE_HASH_BITS_1 PPPOL2TP PPP_ASYNC PPP_BSDCOMP PPP_DEFLATE PPP_FILTER PPP_MPPE PPP_MULTILINK PPP_SYNC_TTY PPTP PREEMPT PREEMPT_NOTIFIERS PROC_CHILDREN PSAMPLE PSI PSTORE PSTORE_COMPRESS QCOM_QMI_HELPERS QNX4FS_FS QNX6FS_FS QRTR QRTR_TUN R8712U RADIO_ADAPTERS RADIO_SHARK RADIO_SHARK2 RADIO_SI470X RADIO_SI4713 RADIO_TEA575X RAID6_PQ RAID_ATTRS RC_ATI_REMOTE RC_CORE RC_DEVICES RC_XBOX_DVD RDMA_RXE RDMA_SIW RDS RDS_RDMA RDS_TCP READ_ONLY_THP_FOR_FS REALTEK_AUTOPM REED_SOLOMON REED_SOLOMON_DEC8 REGMAP REGMAP_I2C REGMAP_IRQ REGMAP_MMIO REGMAP_SPI REGULATOR REGULATOR_FIXED_VOLTAGE REGULATOR_TWL4030 REISERFS_FS REISERFS_FS_POSIX_ACL REISERFS_FS_SECURITY REISERFS_FS_XATTR REISERFS_PROC_INFO RESET_CONTROLLER RFKILL RFKILL_INPUT RFKILL_LEDS RMI4_2D_SENSOR RMI4_CORE RMI4_F03 RMI4_F03_SERIO RMI4_F11 RMI4_F12 RMI4_F30 ROMFS_BACKED_BY_BOTH ROMFS_FS ROMFS_ON_BLOCK ROMFS_ON_MTD ROSE RTC_DRV_HID_SENSOR_TIME RXKAD SCHED_CORE SCREEN_INFO SCSI_FC_ATTRS SCSI_HPSA SCSI_ISCSI_ATTRS SCSI_LOGGING SCSI_NETLINK SCSI_SAS_ATA SCSI_SAS_ATTRS SCSI_SAS_LIBSAS SCSI_SCAN_ASYNC SCSI_SRP_ATTRS SCTP_COOKIE_HMAC_MD5 SCTP_COOKIE_HMAC_SHA1 SCTP_DEFAULT_COOKIE_HMAC_MD5 SECONDARY_TRUSTED_KEYRING SECURITY_INFINIBAND SECURITY_NETWORK_XFRM SENSORS_AQUACOMPUTER_D5NEXT SENSORS_CORSAIR_CPRO SENSORS_CORSAIR_PSU SENSORS_GIGABYTE_WATERFORCE SENSORS_NZXT_KRAKEN2 SENSORS_NZXT_SMART2 SENSORS_POWERZ SERIAL_DEV_BUS SERIAL_DEV_CTRL_TTYPORT SERIAL_MCTRL_GPIO SGI_PARTITION SIGNATURE SIGNED_PE_FILE_VERIFICATION SKB_DECRYPTED SLHC SLIP SLIP_COMPRESSED SLIP_MODE_SLIP6 SLIP_SMART SMARTJOYPLUS_FF SMBFS SMC SMC_DIAG SMSC_PHY SMS_SDIO_DRV SMS_SIANO_DEBUGFS SMS_SIANO_MDTV SMS_SIANO_RC SMS_USB_DRV SND SND_ALOOP SND_BCD2000 SND_CTL_FAST_LOOKUP SND_CTL_LED SND_DEBUG SND_DMA_SGBUF SND_DRIVERS SND_DUMMY SND_DYNAMIC_MINORS SND_HDA SND_HDA_CODEC_ANALOG SND_HDA_CODEC_CA0110 SND_HDA_CODEC_CA0132 SND_HDA_CODEC_CIRRUS SND_HDA_CODEC_CMEDIA SND_HDA_CODEC_CONEXANT SND_HDA_CODEC_HDMI SND_HDA_CODEC_REALTEK SND_HDA_CODEC_SI3054 SND_HDA_CODEC_SIGMATEL 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USB_PULSE8_CEC USB_PWC USB_PWC_INPUT_EVDEV USB_PXA27X USB_R8A66597 USB_R8A66597_HCD USB_RAINSHADOW_CEC USB_RAREMONO USB_RAW_GADGET USB_ROLE_SWITCH USB_RTL8150 USB_RTL8152 USB_RTL8153_ECM USB_S2255 USB_SERIAL USB_SERIAL_AIRCABLE USB_SERIAL_ARK3116 USB_SERIAL_BELKIN USB_SERIAL_CH341 USB_SERIAL_CONSOLE USB_SERIAL_CP210X USB_SERIAL_CYBERJACK USB_SERIAL_CYPRESS_M8 USB_SERIAL_DEBUG USB_SERIAL_DIGI_ACCELEPORT USB_SERIAL_EDGEPORT USB_SERIAL_EDGEPORT_TI USB_SERIAL_EMPEG USB_SERIAL_F81232 USB_SERIAL_F8153X USB_SERIAL_FTDI_SIO USB_SERIAL_GARMIN USB_SERIAL_GENERIC USB_SERIAL_IPAQ USB_SERIAL_IPW USB_SERIAL_IR USB_SERIAL_IUU USB_SERIAL_KEYSPAN USB_SERIAL_KEYSPAN_PDA USB_SERIAL_KLSI USB_SERIAL_KOBIL_SCT USB_SERIAL_MCT_U232 USB_SERIAL_METRO USB_SERIAL_MOS7715_PARPORT USB_SERIAL_MOS7720 USB_SERIAL_MOS7840 USB_SERIAL_MXUPORT USB_SERIAL_NAVMAN USB_SERIAL_OMNINET USB_SERIAL_OPTICON USB_SERIAL_OPTION USB_SERIAL_OTI6858 USB_SERIAL_PL2303 USB_SERIAL_QCAUX USB_SERIAL_QT2 USB_SERIAL_QUALCOMM USB_SERIAL_SAFE USB_SERIAL_SIERRAWIRELESS USB_SERIAL_SIMPLE USB_SERIAL_SPCP8X5 USB_SERIAL_SSU100 USB_SERIAL_SYMBOL USB_SERIAL_TI USB_SERIAL_UPD78F0730 USB_SERIAL_VISOR USB_SERIAL_WHITEHEAT USB_SERIAL_WISHBONE USB_SERIAL_WWAN USB_SERIAL_XR USB_SERIAL_XSENS_MT USB_SEVSEG USB_SI470X USB_SI4713 USB_SIERRA_NET USB_SISUSBVGA USB_SL811_CS USB_SL811_HCD USB_SL811_HCD_ISO USB_SNP_CORE USB_SPEEDTOUCH USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_ENE_UB6250 USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_REALTEK USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_STV06XX USB_TEST USB_TMC USB_TRANCEVIBRATOR USB_UAS USB_UEAGLEATM USB_ULPI_BUS USB_USBNET USB_USS720 USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_VIDEO_CLASS USB_VIDEO_CLASS_INPUT_EVDEV USB_VL600 USB_WDM USB_XHCI_DBGCAP USB_XHCI_PCI_RENESAS USB_XHCI_PLATFORM USB_XUSBATM USB_YUREX USERFAULTFD USERIO USERMODE_DRIVER USER_RETURN_NOTIFIER UVC_COMMON U_SERIAL_CONSOLE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VDPA_USER VETH VFIO VFIO_DEVICE_CDEV VFIO_PCI VFIO_PCI_CORE VFIO_PCI_INTX VFIO_PCI_MMAP VFIO_VIRQFD VGASTATE VHOST VHOST_CROSS_ENDIAN_LEGACY VHOST_IOTLB VHOST_NET VHOST_RING VHOST_TASK VHOST_VDPA VHOST_VSOCK VIDEO VIDEOBUF2_CORE VIDEOBUF2_DMA_CONTIG VIDEOBUF2_DMA_SG VIDEOBUF2_MEMOPS VIDEOBUF2_V4L2 VIDEOBUF2_VMALLOC VIDEOMODE_HELPERS VIDEO_AU0828 VIDEO_AU0828_RC VIDEO_AU0828_V4L2 VIDEO_CS53L32A VIDEO_CX231XX VIDEO_CX231XX_ALSA VIDEO_CX231XX_DVB VIDEO_CX231XX_RC VIDEO_CX2341X VIDEO_CX25840 VIDEO_DEV VIDEO_EM28XX VIDEO_EM28XX_ALSA VIDEO_EM28XX_DVB VIDEO_EM28XX_RC VIDEO_EM28XX_V4L2 VIDEO_GO7007 VIDEO_GO7007_LOADER VIDEO_GO7007_USB VIDEO_GO7007_USB_S2250_BOARD VIDEO_HDPVR VIDEO_MSP3400 VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2_I2C VIDEO_V4L2_SUBDEV_API VIDEO_V4L2_TPG VIDEO_VICODEC VIDEO_VIM2M VIDEO_VIMC VIDEO_VIVID VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS VXLAN WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_PURELIFI WLAN_VENDOR_SILABS X86_SGX X86_SGX_KVM X86_USER_SHADOW_STACK X86_X2APIC X86_X32_ABI XDP_SOCKETS XDP_SOCKETS_DIAG XFRM_ESPINTCP XFRM_INTERFACE XFRM_IPCOMP XFRM_MIGRATE XFRM_OFFLOAD XFRM_STATISTICS XFRM_SUB_POLICY XFRM_USER_COMPAT XFS_FS XFS_POSIX_ACL XFS_QUOTA XFS_RT XILLYBUS_CLASS XILLYUSB XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA Z3FOLD ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZONE_DEVICE ZPOOL ZRAM ZRAM_DEF_COMP_LZO ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_842 ZSWAP_DEFAULT_ON ZSWAP_SHRINKER_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_Z3FOLD] testing current HEAD 989a29cfed9b5092c3e18be14e9032c51bb1c9f6 testing commit 989a29cfed9b5092c3e18be14e9032c51bb1c9f6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2649461898b3f4993761418f6353e1800ee8249a8be08493212d685dcfdaae56 all runs: OK false negative chance: 0.000 # git bisect start 989a29cfed9b5092c3e18be14e9032c51bb1c9f6 8a3f14bb1e944f496d1a16096435ddb2e12e4753 Bisecting: 6593 revisions left to test after this (roughly 13 steps) [54450af662369efbd4cb438ce7b553dfffa00f07] Merge tag 'parisc-for-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux determine whether the revision contains the guilty commit checking the merge base 872cf28b8df9c5c3a1e71a88ee750df7c2513971 no existing result, test the revision testing commit 872cf28b8df9c5c3a1e71a88ee750df7c2513971 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5556d5690d2d7c4d6121dfe62bf034a14e27d9ffc83d1f37f80ffe7c63149823 all runs: crashed: possible deadlock in kernfs_path_from_node representative crash: possible deadlock in kernfs_path_from_node, types: [LOCKDEP] testing commit 54450af662369efbd4cb438ce7b553dfffa00f07 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d89329257faf53776211dca5e9163b49655dd902863eb88af50c0574435540c0 all runs: crashed: possible deadlock in kernfs_path_from_node representative crash: possible deadlock in kernfs_path_from_node, types: [LOCKDEP] # git bisect good 54450af662369efbd4cb438ce7b553dfffa00f07 Bisecting: 3275 revisions left to test after this (roughly 12 steps) [18ba6034468e7949a9e2c2cf28e2e123b4fe7a50] Merge tag 'nfsd-6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux determine whether the revision contains the guilty commit revision 8a3f14bb1e944f496d1a16096435ddb2e12e4753 crashed and is reachable testing commit 18ba6034468e7949a9e2c2cf28e2e123b4fe7a50 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 742010118feca01b8d64a3001d67d3828330af8fd1a76be1be9a6f3815aff9dd all runs: OK false negative chance: 0.000 # git bisect bad 18ba6034468e7949a9e2c2cf28e2e123b4fe7a50 Bisecting: 1632 revisions left to test after this (roughly 11 steps) [de848da12f752170c2ebe114804a985314fd5a6a] Merge tag 'drm-next-2024-09-19' of https://gitlab.freedesktop.org/drm/kernel determine whether the revision contains the guilty commit revision 872cf28b8df9c5c3a1e71a88ee750df7c2513971 crashed and is reachable testing commit de848da12f752170c2ebe114804a985314fd5a6a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 442cc4a8299d620ca1dcc8719f5cbde9205909fe5ba56ed6e578ace5071b34d7 all runs: crashed: possible deadlock in kernfs_path_from_node representative crash: possible deadlock in kernfs_path_from_node, types: [LOCKDEP] # git bisect good de848da12f752170c2ebe114804a985314fd5a6a Bisecting: 784 revisions left to test after this (roughly 10 steps) [7856a565416e0cf091f825b0e25c7a1b7abb650e] Merge tag 'mm-nonmm-stable-2024-09-21-07-52' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm determine whether the revision contains the guilty commit revision de848da12f752170c2ebe114804a985314fd5a6a crashed and is reachable testing commit 7856a565416e0cf091f825b0e25c7a1b7abb650e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0e0187dc6b4c11a68edc7a57ec25327ea0e3b840a72e516e858abbecf04b9cca all runs: OK false negative chance: 0.000 # git bisect bad 7856a565416e0cf091f825b0e25c7a1b7abb650e Bisecting: 431 revisions left to test after this (roughly 9 steps) [684826f8271ad97580b138b9ffd462005e470b99] zram: free secondary algorithms names determine whether the revision contains the guilty commit revision 872cf28b8df9c5c3a1e71a88ee750df7c2513971 crashed and is reachable testing commit 684826f8271ad97580b138b9ffd462005e470b99 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7e6525c428ffe45e3966e3780ff3821d513572350f38a7c6c985bf41aefa53a1 all runs: OK false negative chance: 0.000 # git bisect bad 684826f8271ad97580b138b9ffd462005e470b99 Bisecting: 207 revisions left to test after this (roughly 8 steps) [ef5f379de302884b9b7ad9b62587a942a9f0bb55] mm: always inline _compound_head() with CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP=y determine whether the revision contains the guilty commit revision 872cf28b8df9c5c3a1e71a88ee750df7c2513971 crashed and is reachable testing commit ef5f379de302884b9b7ad9b62587a942a9f0bb55 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4cdd5b6e9496ca9fdccedba9320d49967891bc0c036f528e5332c062699c4baa all runs: OK false negative chance: 0.000 # git bisect bad ef5f379de302884b9b7ad9b62587a942a9f0bb55 Bisecting: 103 revisions left to test after this (roughly 7 steps) [1c399e74a97ca733d0780cc51819aa81fb292c22] mm/x86: implement arch_check_zapped_pud() determine whether the revision contains the guilty commit revision 872cf28b8df9c5c3a1e71a88ee750df7c2513971 crashed and is reachable testing commit 1c399e74a97ca733d0780cc51819aa81fb292c22 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7ea6073fad6c6a3b2f17ca531334c159435f92cef99bb4686aa11bc6619fd99b all runs: crashed: possible deadlock in kernfs_path_from_node representative crash: possible deadlock in kernfs_path_from_node, types: [LOCKDEP] # git bisect good 1c399e74a97ca733d0780cc51819aa81fb292c22 Bisecting: 51 revisions left to test after this (roughly 6 steps) [862590ac3708e1cbbfb02a8ed78587b86ecba4ba] mm: swap: allow cache reclaim to skip slot cache determine whether the revision contains the guilty commit revision 1c399e74a97ca733d0780cc51819aa81fb292c22 crashed and is reachable testing commit 862590ac3708e1cbbfb02a8ed78587b86ecba4ba gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 03d935d0a1b2d82ee900cccfedfc8ef30c523c106557dc679862202605eb6543 all runs: OK false negative chance: 0.000 # git bisect bad 862590ac3708e1cbbfb02a8ed78587b86ecba4ba Bisecting: 25 revisions left to test after this (roughly 5 steps) [580fcbd67ce2cdf9d70c7a8eda0789b9eba1c3af] maple_tree: use store type in mas_wr_store_entry() determine whether the revision contains the guilty commit revision 1c399e74a97ca733d0780cc51819aa81fb292c22 crashed and is reachable testing commit 580fcbd67ce2cdf9d70c7a8eda0789b9eba1c3af gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3fe66c06cee181f08f7b26ecca194a5275aa9a83a55a69cdab205b118b303759 all runs: OK false negative chance: 0.000 # git bisect bad 580fcbd67ce2cdf9d70c7a8eda0789b9eba1c3af Bisecting: 12 revisions left to test after this (roughly 4 steps) [40b88644dd92d99e572063893c2a247598c238d6] mm: remove arch_unmap() determine whether the revision contains the guilty commit revision 872cf28b8df9c5c3a1e71a88ee750df7c2513971 crashed and is reachable testing commit 40b88644dd92d99e572063893c2a247598c238d6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ca4f0c3fb24533e0223f400ab5216e0f8086cbd9f8c0eee88c043f5829fca28e all runs: OK false negative chance: 0.000 # git bisect bad 40b88644dd92d99e572063893c2a247598c238d6 Bisecting: 6 revisions left to test after this (roughly 3 steps) [e1b8b883bb838339eec728de5d02e2f252a7d3d9] maple_tree: reset mas->index and mas->last on write retries determine whether the revision contains the guilty commit revision 872cf28b8df9c5c3a1e71a88ee750df7c2513971 crashed and is reachable testing commit e1b8b883bb838339eec728de5d02e2f252a7d3d9 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 16a0c32df7937899be288a22cbf820c3e05fcde762f79b3f89aa89ceed68af3f all runs: OK false negative chance: 0.000 # git bisect bad e1b8b883bb838339eec728de5d02e2f252a7d3d9 Bisecting: 2 revisions left to test after this (roughly 2 steps) [b6273b55d88539c6a7127a697c61d3f89c5831fe] filemap: add trace events for get_pages, map_pages, and fault determine whether the revision contains the guilty commit revision 1c399e74a97ca733d0780cc51819aa81fb292c22 crashed and is reachable testing commit b6273b55d88539c6a7127a697c61d3f89c5831fe gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c4d9806cf14c1a73d1510a34c70ae1027f7ed0be9523aa2ecc432b8bd9cf0c4f all runs: OK false negative chance: 0.000 # git bisect bad b6273b55d88539c6a7127a697c61d3f89c5831fe Bisecting: 0 revisions left to test after this (roughly 1 step) [cb0f01beb16669e91510fcdb2cea213931aee017] mm/mprotect: fix dax pud handlings determine whether the revision contains the guilty commit revision 1c399e74a97ca733d0780cc51819aa81fb292c22 crashed and is reachable testing commit cb0f01beb16669e91510fcdb2cea213931aee017 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f676d477065b86df118db81251571f54c6997b085edbc5aac1315a603a82e58d all runs: crashed: possible deadlock in kernfs_path_from_node representative crash: possible deadlock in kernfs_path_from_node, types: [LOCKDEP] # git bisect good cb0f01beb16669e91510fcdb2cea213931aee017 b6273b55d88539c6a7127a697c61d3f89c5831fe is the first bad commit commit b6273b55d88539c6a7127a697c61d3f89c5831fe Author: Takaya Saeki Date: Tue Aug 13 10:03:12 2024 +0000 filemap: add trace events for get_pages, map_pages, and fault To allow precise tracking of page caches accessed, add new tracepoints that trigger when a process actually accesses them. The ureadahead program used by ChromeOS traces the disk access of programs as they start up at boot up. It uses mincore(2) or the 'mm_filemap_add_to_page_cache' trace event to accomplish this. It stores this information in a "pack" file and on subsequent boots, it will read the pack file and call readahead(2) on the information so that disk storage can be loaded into RAM before the applications actually need it. A problem we see is that due to the kernel's readahead algorithm that can aggressively pull in more data than needed (to try and accomplish the same goal) and this data is also recorded. The end result is that the pack file contains a lot of pages on disk that are never actually used. Calling readahead(2) on these unused pages can slow down the system boot up times. To solve this, add 3 new trace events, get_pages, map_pages, and fault. These will be used to trace the pages are not only pulled in from disk, but are actually used by the application. Only those pages will be stored in the pack file, and this helps out the performance of boot up. With the combination of these 3 new trace events and mm_filemap_add_to_page_cache, we observed a reduction in the pack file by 7.3% - 20% on ChromeOS varying by device. Link: https://lkml.kernel.org/r/20240813100312.3930505-1-takayas@chromium.org Signed-off-by: Takaya Saeki Reviewed-by: Masami Hiramatsu (Google) Reviewed-by: Steven Rostedt (Google) Cc: Junichi Uekawa Cc: Mathieu Desnoyers Cc: Matthew Wilcox Signed-off-by: Andrew Morton include/trace/events/filemap.h | 84 ++++++++++++++++++++++++++++++++++++++++++ mm/filemap.c | 4 ++ 2 files changed, 88 insertions(+) accumulated error probability: 0.00 culprit signature: c4d9806cf14c1a73d1510a34c70ae1027f7ed0be9523aa2ecc432b8bd9cf0c4f parent signature: f676d477065b86df118db81251571f54c6997b085edbc5aac1315a603a82e58d revisions tested: 21, total time: 7h17m3.996626987s (build: 4h2m20.921171602s, test: 2h53m20.916080715s) first good commit: b6273b55d88539c6a7127a697c61d3f89c5831fe filemap: add trace events for get_pages, map_pages, and fault recipients (to): ["akpm@linux-foundation.org" "mhiramat@kernel.org" "rostedt@goodmis.org" "takayas@chromium.org"] recipients (cc): []