On Mon, 2007-03-05 at 15:15 +0100, Franck Bui-Huu wrote: Thanks for caring Franck, > Does your platform code do some address translation by using > CPHYSADDR() macro or by using anything else than pa() ? Not at all, I've reduced platform code to minimum for the test, it basically registers a prom console, and do add_memory_region(0x10000000, 32 << 20), remaining is basic irq and time stuff. > Just to be sure, is your PAGE_OFFSET equal to 0x80000000 ? Yes, here is my spaces.h content: #define PHYS_OFFSET 0x10000000 #define CAC_BASE 0x90000000 #define IO_BASE 0xa0000000 #define UNCAC_BASE 0xa0000000 #define MAP_BASE 0xc0000000 #define PAGE_OFFSET 0x80000000UL Note: The CAC_BASE value of 0x90000000 is for the linux exception code to work as-is, since there is no RAM at 0x80000000 to put vector code. I dug a little and found the following. My kernel is loaded at 0x9012d000, '&_end' value is 0x901d4020. In bootmem_init(), we try to compute reserved_end by using __pa_symbol(&_end), which adds PHYS_OFFSET to it, though it was already accounted. The loop in setup.c is thus unable to compute a correct 'map_start' value since 'reserved_end' is way above all declared memory. init_bootmem_node() is then called with a 'map_start' default value of ~0. Maybe that case should fall in the invalid memory map panic ? I tried to set 'reserved_end' value manually and it went furter, but I end up with the following message: Bad page state in process 'swapper' page:81000000 flags:0x00000000 mapping:00000000 mapcount:1 count:0 Trying to fix it up, but a reboot is needed Backtrace: Call Trace: [<90029f10>] dump_stack+0x8/0x34 [<9006ac58>] bad_page+0x68/0xa8 [<9006b0a4>] __free_pages_ok+0x358/0x37c [<9013d374>] free_all_bootmem_core+0x24c/0x270 [<90134f30>] mem_init+0x40/0x19c [<9012d828>] start_kernel+0x1d4/0x36c Full dmesg with and without manual set of reserved_end attached. Regards, -- Maxime
# # Automatically generated make config: don't edit # Linux kernel version: 2.6.20 # Mon Mar 5 15:55:02 2007 # CONFIG_MIPS=y # # Machine selection # # CONFIG_BCM963xx is not set CONFIG_TANGO2=y # CONFIG_MIPS_MTX1 is not set # CONFIG_MIPS_BOSPORUS is not set # CONFIG_MIPS_PB1000 is not set # CONFIG_MIPS_PB1100 is not set # CONFIG_MIPS_PB1500 is not set # CONFIG_MIPS_PB1550 is not set # CONFIG_MIPS_PB1200 is not set # CONFIG_MIPS_DB1000 is not set # CONFIG_MIPS_DB1100 is not set # CONFIG_MIPS_DB1500 is not set # CONFIG_MIPS_DB1550 is not set # CONFIG_MIPS_DB1200 is not set # CONFIG_MIPS_MIRAGE is not set # CONFIG_BASLER_EXCITE is not set # CONFIG_MIPS_COBALT is not set # CONFIG_MACH_DECSTATION is not set # CONFIG_MIPS_EV64120 is not set # CONFIG_MACH_JAZZ is not set # CONFIG_LASAT is not set # CONFIG_MIPS_ATLAS is not set # CONFIG_MIPS_MALTA is not set # CONFIG_MIPS_SEAD is not set # CONFIG_WR_PPMC is not set # CONFIG_MIPS_SIM is not set # CONFIG_MOMENCO_JAGUAR_ATX is not set # CONFIG_MOMENCO_OCELOT is not set # CONFIG_MOMENCO_OCELOT_3 is not set # CONFIG_MOMENCO_OCELOT_C is not set # CONFIG_MOMENCO_OCELOT_G is not set # CONFIG_MIPS_XXS1500 is not set # CONFIG_PNX8550_V2PCI is not set # CONFIG_PNX8550_JBS is not set # CONFIG_PNX8550_STB810 is not set # CONFIG_DDB5477 is not set # CONFIG_MACH_VR41XX is not set # CONFIG_PMC_YOSEMITE is not set # CONFIG_QEMU is not set # CONFIG_MARKEINS is not set # CONFIG_SGI_IP22 is not set # CONFIG_SGI_IP27 is not set # CONFIG_SGI_IP32 is not set # CONFIG_SIBYTE_BIGSUR is not set # CONFIG_SIBYTE_SWARM is not set # CONFIG_SIBYTE_SENTOSA is not set # CONFIG_SIBYTE_RHONE is not set # CONFIG_SIBYTE_CARMEL is not set # CONFIG_SIBYTE_PTSWARM is not set # CONFIG_SIBYTE_LITTLESUR is not set # CONFIG_SIBYTE_CRHINE is not set # CONFIG_SIBYTE_CRHONE is not set # CONFIG_SNI_RM is not set # CONFIG_TOSHIBA_JMR3927 is not set # CONFIG_TOSHIBA_RBTX4927 is not set # CONFIG_TOSHIBA_RBTX4938 is not set # CONFIG_TANGO2_ES1 is not set # CONFIG_TANGO2_ES2 is not set # CONFIG_TANGO2_ES3 is not set # CONFIG_TANGO2_ES4 is not set # CONFIG_TANGO2_ES5 is not set CONFIG_TANGO2_ES6=y # CONFIG_KEXEC is not set CONFIG_RWSEM_GENERIC_SPINLOCK=y # CONFIG_ARCH_HAS_ILOG2_U32 is not set # CONFIG_ARCH_HAS_ILOG2_U64 is not set CONFIG_GENERIC_FIND_NEXT_BIT=y CONFIG_GENERIC_HWEIGHT=y CONFIG_GENERIC_CALIBRATE_DELAY=y CONFIG_GENERIC_TIME=y CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y # CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ is not set CONFIG_DMA_NONCOHERENT=y CONFIG_DMA_NEED_PCI_MAP_STATE=y # CONFIG_CPU_BIG_ENDIAN is not set CONFIG_CPU_LITTLE_ENDIAN=y CONFIG_SYS_SUPPORTS_LITTLE_ENDIAN=y CONFIG_IRQ_CPU=y CONFIG_MIPS_L1_CACHE_SHIFT=5 # # CPU selection # # CONFIG_CPU_MIPS32_R1 is not set CONFIG_CPU_MIPS32_R2=y # CONFIG_CPU_MIPS64_R1 is not set # CONFIG_CPU_MIPS64_R2 is not set # CONFIG_CPU_R3000 is not set # CONFIG_CPU_TX39XX is not set # CONFIG_CPU_VR41XX is not set # CONFIG_CPU_R4300 is not set # CONFIG_CPU_R4X00 is not set # CONFIG_CPU_TX49XX is not set # CONFIG_CPU_R5000 is not set # CONFIG_CPU_R5432 is not set # CONFIG_CPU_R6000 is not set # CONFIG_CPU_NEVADA is not set # CONFIG_CPU_R8000 is not set # CONFIG_CPU_R10000 is not set # CONFIG_CPU_RM7000 is not set # CONFIG_CPU_RM9000 is not set # CONFIG_CPU_SB1 is not set CONFIG_SYS_HAS_CPU_MIPS32_R1=y CONFIG_SYS_HAS_CPU_MIPS32_R2=y CONFIG_CPU_MIPS32=y CONFIG_CPU_MIPSR2=y CONFIG_SYS_SUPPORTS_32BIT_KERNEL=y CONFIG_CPU_SUPPORTS_32BIT_KERNEL=y # # Kernel type # CONFIG_32BIT=y # CONFIG_64BIT is not set CONFIG_PAGE_SIZE_4KB=y # CONFIG_PAGE_SIZE_8KB is not set # CONFIG_PAGE_SIZE_16KB is not set # CONFIG_PAGE_SIZE_64KB is not set CONFIG_CPU_HAS_PREFETCH=y CONFIG_MIPS_MT_DISABLED=y # CONFIG_MIPS_MT_SMP is not set # CONFIG_MIPS_MT_SMTC is not set # CONFIG_MIPS_VPE_LOADER is not set # CONFIG_64BIT_PHYS_ADDR is not set CONFIG_CPU_HAS_LLSC=y CONFIG_CPU_HAS_SYNC=y CONFIG_GENERIC_HARDIRQS=y CONFIG_GENERIC_IRQ_PROBE=y CONFIG_CPU_SUPPORTS_HIGHMEM=y CONFIG_ARCH_FLATMEM_ENABLE=y CONFIG_SELECT_MEMORY_MODEL=y CONFIG_FLATMEM_MANUAL=y # CONFIG_DISCONTIGMEM_MANUAL is not set # CONFIG_SPARSEMEM_MANUAL is not set CONFIG_FLATMEM=y CONFIG_FLAT_NODE_MEM_MAP=y # CONFIG_SPARSEMEM_STATIC is not set CONFIG_SPLIT_PTLOCK_CPUS=4 # CONFIG_RESOURCES_64BIT is not set # CONFIG_HZ_48 is not set # CONFIG_HZ_100 is not set # CONFIG_HZ_128 is not set CONFIG_HZ_250=y # CONFIG_HZ_256 is not set # CONFIG_HZ_1000 is not set # CONFIG_HZ_1024 is not set CONFIG_SYS_SUPPORTS_ARBIT_HZ=y CONFIG_HZ=250 CONFIG_PREEMPT_NONE=y # CONFIG_PREEMPT_VOLUNTARY is not set # CONFIG_PREEMPT is not set CONFIG_LOCKDEP_SUPPORT=y CONFIG_STACKTRACE_SUPPORT=y CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config" # # Code maturity level options # CONFIG_EXPERIMENTAL=y CONFIG_BROKEN_ON_SMP=y CONFIG_INIT_ENV_ARG_LIMIT=32 # # General setup # CONFIG_LOCALVERSION="" # CONFIG_LOCALVERSION_AUTO is not set # CONFIG_IGNORE_COMPILE_INFO is not set # CONFIG_SYSVIPC is not set # CONFIG_BSD_PROCESS_ACCT is not set # CONFIG_UTS_NS is not set # CONFIG_IKCONFIG is not set # CONFIG_SYSFS_DEPRECATED is not set # CONFIG_RELAY is not set CONFIG_INITRAMFS_USE_GZIP=y CONFIG_INITRAMFS_SOURCE="../../buildroot/images/root-noversion/" CONFIG_INITRAMFS_ROOT_UID=0 CONFIG_INITRAMFS_ROOT_GID=0 # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set CONFIG_SYSCTL=y CONFIG_EMBEDDED=y CONFIG_SYSCTL_SYSCALL=y CONFIG_KALLSYMS=y CONFIG_KALLSYMS_ALL=y # CONFIG_KALLSYMS_EXTRA_PASS is not set CONFIG_HOTPLUG=y CONFIG_PRINTK=y CONFIG_BUG=y # CONFIG_ELF_CORE is not set CONFIG_BASE_FULL=y # CONFIG_FUTEX is not set # CONFIG_EPOLL is not set # CONFIG_SHMEM is not set CONFIG_SLAB=y CONFIG_VM_EVENT_COUNTERS=y CONFIG_TINY_SHMEM=y CONFIG_BASE_SMALL=0 # CONFIG_SLOB is not set # # Loadable module support # # CONFIG_MODULES is not set # # Block layer # # CONFIG_BLOCK is not set # # Bus options (PCI, PCMCIA, EISA, ISA, TC) # CONFIG_HW_HAS_PCI=y # CONFIG_PCI is not set CONFIG_MMU=y # # PCCARD (PCMCIA/CardBus) support # # CONFIG_PCCARD is not set # # PCI Hotplug Support # # # Executable file formats # CONFIG_BINFMT_ELF=y # CONFIG_BINFMT_MISC is not set CONFIG_TRAD_SIGNALS=y # # Networking # # CONFIG_NET is not set # # Device Drivers # # # Generic Driver Options # CONFIG_STANDALONE=y # CONFIG_PREVENT_FIRMWARE_BUILD is not set CONFIG_FW_LOADER=y # CONFIG_DEBUG_DRIVER is not set # CONFIG_SYS_HYPERVISOR is not set # # Connector - unified userspace <-> kernelspace linker # # # Memory Technology Devices (MTD) # # CONFIG_MTD is not set # # Parallel port support # # CONFIG_PARPORT is not set # # Plug and Play support # # # Misc devices # # CONFIG_TIFM_CORE is not set # # SCSI device support # # CONFIG_SCSI_NETLINK is not set # # Serial ATA (prod) and Parallel ATA (experimental) drivers # # # Fusion MPT device support # # CONFIG_FUSION is not set # # IEEE 1394 (FireWire) support # # # I2O device support # # # ISDN subsystem # # # Telephony Support # # CONFIG_PHONE is not set # # Input device support # CONFIG_INPUT=y # CONFIG_INPUT_FF_MEMLESS is not set # # Userland interfaces # # CONFIG_INPUT_MOUSEDEV is not set # CONFIG_INPUT_JOYDEV is not set # CONFIG_INPUT_TSDEV is not set CONFIG_INPUT_EVDEV=y # CONFIG_INPUT_EVBUG is not set # # Input Device Drivers # # CONFIG_INPUT_KEYBOARD is not set # CONFIG_INPUT_MOUSE is not set # CONFIG_INPUT_JOYSTICK is not set # CONFIG_INPUT_TOUCHSCREEN is not set # CONFIG_INPUT_MISC is not set # # Hardware I/O ports # # CONFIG_SERIO is not set # CONFIG_GAMEPORT is not set # # Character devices # # CONFIG_VT is not set # CONFIG_SERIAL_NONSTANDARD is not set # # Serial drivers # CONFIG_SERIAL_8250=y CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_8250_NR_UARTS=2 CONFIG_SERIAL_8250_RUNTIME_UARTS=2 # CONFIG_SERIAL_8250_EXTENDED is not set # # Non-8250 serial port support # CONFIG_SERIAL_CORE=y CONFIG_SERIAL_CORE_CONSOLE=y CONFIG_UNIX98_PTYS=y CONFIG_LEGACY_PTYS=y CONFIG_LEGACY_PTY_COUNT=8 # # IPMI # # CONFIG_IPMI_HANDLER is not set # # Watchdog Cards # # CONFIG_WATCHDOG is not set # CONFIG_HW_RANDOM is not set # CONFIG_RTC is not set # CONFIG_GEN_RTC is not set # CONFIG_DTLK is not set # CONFIG_R3964 is not set # # TPM devices # # CONFIG_TCG_TPM is not set # # I2C support # CONFIG_I2C=y # CONFIG_I2C_CHARDEV is not set # # I2C Algorithms # CONFIG_I2C_ALGOBIT=y # CONFIG_I2C_ALGOPCF is not set # CONFIG_I2C_ALGOPCA is not set # # I2C Hardware Bus support # # CONFIG_I2C_OCORES is not set # CONFIG_I2C_PARPORT_LIGHT is not set # CONFIG_I2C_PCA_ISA is not set # # Miscellaneous I2C Chip support # # CONFIG_SENSORS_DS1337 is not set # CONFIG_SENSORS_DS1374 is not set # CONFIG_SENSORS_EEPROM is not set # CONFIG_SENSORS_PCF8574 is not set # CONFIG_SENSORS_PCA9539 is not set # CONFIG_SENSORS_PCF8591 is not set # CONFIG_SENSORS_MAX6875 is not set # CONFIG_I2C_DEBUG_CORE is not set # CONFIG_I2C_DEBUG_ALGO is not set # CONFIG_I2C_DEBUG_BUS is not set # CONFIG_I2C_DEBUG_CHIP is not set # # SPI support # # CONFIG_SPI is not set # CONFIG_SPI_MASTER is not set # # Dallas's 1-wire bus # # CONFIG_W1 is not set # # Hardware Monitoring support # # CONFIG_HWMON is not set # CONFIG_HWMON_VID is not set # # Multimedia devices # # CONFIG_VIDEO_DEV is not set # # Digital Video Broadcasting Devices # # # Graphics support # # CONFIG_FIRMWARE_EDID is not set # CONFIG_FB is not set # CONFIG_BACKLIGHT_LCD_SUPPORT is not set # # Sound # # CONFIG_SOUND is not set # # HID Devices # CONFIG_HID=y # # USB support # # CONFIG_USB_ARCH_HAS_HCD is not set # CONFIG_USB_ARCH_HAS_OHCI is not set # CONFIG_USB_ARCH_HAS_EHCI is not set # # NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support' # # # USB Gadget Support # # CONFIG_USB_GADGET is not set # # MMC/SD Card support # # CONFIG_MMC is not set # # LED devices # # CONFIG_NEW_LEDS is not set # # LED drivers # # # LED Triggers # # # InfiniBand support # # # EDAC - error detection and reporting (RAS) (EXPERIMENTAL) # # # Real Time Clock # # CONFIG_RTC_CLASS is not set # # Tango2 devices # # CONFIG_TANGO2_FIP is not set # CONFIG_TANGO2_GPIO is not set # CONFIG_TANGO2_IR is not set # # DMA Engine support # # CONFIG_DMA_ENGINE is not set # # DMA Clients # # # DMA Devices # # # Virtualization # # # File systems # # CONFIG_INOTIFY is not set # CONFIG_QUOTA is not set # CONFIG_DNOTIFY is not set # CONFIG_AUTOFS_FS is not set # CONFIG_AUTOFS4_FS is not set # CONFIG_FUSE_FS is not set # # Pseudo filesystems # CONFIG_PROC_FS=y # CONFIG_PROC_KCORE is not set CONFIG_PROC_SYSCTL=y CONFIG_SYSFS=y CONFIG_TMPFS=y # CONFIG_TMPFS_POSIX_ACL is not set # CONFIG_HUGETLB_PAGE is not set CONFIG_RAMFS=y # CONFIG_CONFIGFS_FS is not set # CONFIG_CTMP_FS is not set # # Miscellaneous filesystems # # CONFIG_SQUASHFS is not set # # Native Language Support # CONFIG_NLS=y CONFIG_NLS_DEFAULT="iso8859-1" CONFIG_NLS_CODEPAGE_437=y # CONFIG_NLS_CODEPAGE_737 is not set # CONFIG_NLS_CODEPAGE_775 is not set CONFIG_NLS_CODEPAGE_850=y # CONFIG_NLS_CODEPAGE_852 is not set # CONFIG_NLS_CODEPAGE_855 is not set # CONFIG_NLS_CODEPAGE_857 is not set # CONFIG_NLS_CODEPAGE_860 is not set # CONFIG_NLS_CODEPAGE_861 is not set # CONFIG_NLS_CODEPAGE_862 is not set # CONFIG_NLS_CODEPAGE_863 is not set # CONFIG_NLS_CODEPAGE_864 is not set # CONFIG_NLS_CODEPAGE_865 is not set # CONFIG_NLS_CODEPAGE_866 is not set # CONFIG_NLS_CODEPAGE_869 is not set # CONFIG_NLS_CODEPAGE_936 is not set # CONFIG_NLS_CODEPAGE_950 is not set # CONFIG_NLS_CODEPAGE_932 is not set # CONFIG_NLS_CODEPAGE_949 is not set # CONFIG_NLS_CODEPAGE_874 is not set # CONFIG_NLS_ISO8859_8 is not set # CONFIG_NLS_CODEPAGE_1250 is not set # CONFIG_NLS_CODEPAGE_1251 is not set CONFIG_NLS_ASCII=y CONFIG_NLS_ISO8859_1=y # CONFIG_NLS_ISO8859_2 is not set # CONFIG_NLS_ISO8859_3 is not set # CONFIG_NLS_ISO8859_4 is not set # CONFIG_NLS_ISO8859_5 is not set # CONFIG_NLS_ISO8859_6 is not set # CONFIG_NLS_ISO8859_7 is not set # CONFIG_NLS_ISO8859_9 is not set # CONFIG_NLS_ISO8859_13 is not set # CONFIG_NLS_ISO8859_14 is not set CONFIG_NLS_ISO8859_15=y # CONFIG_NLS_KOI8_R is not set # CONFIG_NLS_KOI8_U is not set CONFIG_NLS_UTF8=y # # Profiling support # # CONFIG_PROFILING is not set # # Kernel hacking # CONFIG_TRACE_IRQFLAGS_SUPPORT=y # CONFIG_PRINTK_TIME is not set CONFIG_ENABLE_MUST_CHECK=y # CONFIG_MAGIC_SYSRQ is not set # CONFIG_UNUSED_SYMBOLS is not set # CONFIG_DEBUG_FS is not set # CONFIG_HEADERS_CHECK is not set CONFIG_DEBUG_KERNEL=y CONFIG_LOG_BUF_SHIFT=14 CONFIG_DETECT_SOFTLOCKUP=y # CONFIG_SCHEDSTATS is not set # CONFIG_DEBUG_SLAB is not set # CONFIG_DEBUG_SPINLOCK is not set # CONFIG_DEBUG_MUTEXES is not set # CONFIG_DEBUG_RWSEMS is not set # CONFIG_DEBUG_LOCK_ALLOC is not set # CONFIG_PROVE_LOCKING is not set # CONFIG_DEBUG_SPINLOCK_SLEEP is not set # CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set # CONFIG_DEBUG_KOBJECT is not set # CONFIG_DEBUG_INFO is not set # CONFIG_DEBUG_VM is not set # CONFIG_DEBUG_LIST is not set CONFIG_FORCED_INLINING=y # CONFIG_RCU_TORTURE_TEST is not set CONFIG_CROSSCOMPILE=y CONFIG_CMDLINE="console=ttyS0 root=/dev/nfs ip=dhcp" # CONFIG_DEBUG_STACK_USAGE is not set # CONFIG_KGDB is not set CONFIG_RUNTIME_DEBUG=y # CONFIG_MIPS_UNCACHED is not set # # Security options # # CONFIG_KEYS is not set # CONFIG_SECURITY is not set # # Cryptographic options # # CONFIG_CRYPTO is not set # # Library routines # CONFIG_BITREVERSE=y # CONFIG_CRC_CCITT is not set # CONFIG_CRC16 is not set CONFIG_CRC32=y # CONFIG_LIBCRC32C is not set CONFIG_IOMAP_COPY=y
Linux version 2.6.20 (max@sakura) (gcc version 4.1.2) #40 Mon Mar 5 17:15:57 CET 2007 prom console registered CPU revision is: 00019068 Determined physical RAM map: memory: 02000000 @ 10000000 (usable) DEBUG: reserved_end: 0x000201d5 DEBUG: init_bootmem_node: mapstart:0xffffffff min_low_pfn:0x00010000 max_low_pfn:0x00012000
Linux version 2.6.20 (max@sakura) (gcc version 4.1.2) #41 Mon Mar 5 17:18:04 CET 2007 prom console registered CPU revision is: 00019068 Determined physical RAM map: memory: 02000000 @ 10000000 (usable) DEBUG: reserved_end: 0x000101d5 DEBUG: init_bootmem_node: mapstart:0x000101d5 min_low_pfn:0x00010000 max_low_pfn:0x00012000 On node 0 totalpages: 8192 DMA zone: 64 pages used for memmap DMA zone: 0 pages reserved DMA zone: 8128 pages, LIFO batch:0 Normal zone: 0 pages used for memmap Built 1 zonelists. Total pages: 8128 Kernel command line: console=ttyS0 root=/dev/nfs ip=dhcp Primary instruction cache 16kB, physically tagged, 2-way, linesize 16 bytes. Primary data cache 16kB, 2-way, linesize 16 bytes. Synthesized TLB refill handler (20 instructions). Synthesized TLB load handler fastpath (32 instructions). Synthesized TLB store handler fastpath (32 instructions). Synthesized TLB modify handler fastpath (31 instructions). PID hash table entries: 128 (order: 7, 512 bytes) Using 150.750 MHz high precision timer. Dentry cache hash table entries: 4096 (order: 2, 16384 bytes) Inode-cache hash table entries: 2048 (order: 1, 8192 bytes) Bad page state in process 'swapper' page:81000000 flags:0x00000000 mapping:00000000 mapcount:1 count:0 Trying to fix it up, but a reboot is needed Backtrace: Call Trace: [<90029f10>] dump_stack+0x8/0x34 [<9006ac58>] bad_page+0x68/0xa8 [<9006b0a4>] __free_pages_ok+0x358/0x37c [<9013d2d0>] free_all_bootmem_core+0x24c/0x270 [<90134e8c>] mem_init+0x40/0x19c [<9012d828>] start_kernel+0x1d4/0x36c Bad page state in process 'swapper' page:81000020 flags:0x00000000 mapping:00000000 mapcount:1 count:0 Trying to fix it up, but a reboot is needed Backtrace: Call Trace: [<90029f10>] dump_stack+0x8/0x34 [<9006ac58>] bad_page+0x68/0xa8 [<9006b0a4>] __free_pages_ok+0x358/0x37c [<9013d2d0>] free_all_bootmem_core+0x24c/0x270 [<90134e8c>] mem_init+0x40/0x19c [<9012d828>] start_kernel+0x1d4/0x36c
