On Tue, Jan 24, 2012 at 11:34:25AM +0100, Arend van Spriel wrote: > I moved my development work to 3.3.0-rc1 from wireless-testing > repository. After loading the brcmfmac driver (12 sec.) I suddenly see > the BUG message 'scheduling while atomic' and it fills up the entire log > with the machine becoming totally unresponsive. > > Any suggestions on where to start looking. What type of problems could > cause this? There are various debug config options which allow to narrow such problems down. CONFIG_LOCKDEP seems to be most useful, but there are other quite helpful too. Try to add options from attached file to your .config (do not forgot to "make oldconfig" and check if these options ware not wiped out), and after recompile see if kernel will print some more valuable messages. Stanislaw
# # Kernel hacking # CONFIG_TRACE_IRQFLAGS_SUPPORT=y CONFIG_PRINTK_TIME=y CONFIG_DEFAULT_MESSAGE_LOGLEVEL=4 # CONFIG_ENABLE_WARN_DEPRECATED is not set CONFIG_ENABLE_MUST_CHECK=y CONFIG_FRAME_WARN=1024 CONFIG_MAGIC_SYSRQ=y CONFIG_STRIP_ASM_SYMS=y # CONFIG_UNUSED_SYMBOLS is not set CONFIG_DEBUG_FS=y CONFIG_HEADERS_CHECK=y # CONFIG_DEBUG_SECTION_MISMATCH is not set CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_SHIRQ=y # CONFIG_LOCKUP_DETECTOR is not set # CONFIG_HARDLOCKUP_DETECTOR is not set CONFIG_DETECT_HUNG_TASK=y CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=120 # CONFIG_BOOTPARAM_HUNG_TASK_PANIC is not set CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE=0 CONFIG_SCHED_DEBUG=y CONFIG_SCHEDSTATS=y CONFIG_TIMER_STATS=y CONFIG_DEBUG_OBJECTS=y # CONFIG_DEBUG_OBJECTS_SELFTEST is not set CONFIG_DEBUG_OBJECTS_FREE=y CONFIG_DEBUG_OBJECTS_TIMERS=y CONFIG_DEBUG_OBJECTS_WORK=y CONFIG_DEBUG_OBJECTS_RCU_HEAD=y # CONFIG_DEBUG_OBJECTS_PERCPU_COUNTER is not set CONFIG_DEBUG_OBJECTS_ENABLE_DEFAULT=1 # CONFIG_SLUB_STATS is not set CONFIG_DEBUG_RT_MUTEXES=y CONFIG_DEBUG_PI_LIST=y # CONFIG_RT_MUTEX_TESTER is not set CONFIG_DEBUG_SPINLOCK=y CONFIG_DEBUG_MUTEXES=y CONFIG_DEBUG_LOCK_ALLOC=y CONFIG_PROVE_LOCKING=y # CONFIG_PROVE_RCU is not set # CONFIG_SPARSE_RCU_POINTER is not set CONFIG_LOCKDEP=y # CONFIG_LOCK_STAT is not set # CONFIG_DEBUG_LOCKDEP is not set CONFIG_TRACE_IRQFLAGS=y # CONFIG_DEBUG_ATOMIC_SLEEP is not set # CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set CONFIG_STACKTRACE=y CONFIG_DEBUG_STACK_USAGE=y # CONFIG_DEBUG_KOBJECT is not set CONFIG_DEBUG_HIGHMEM=y # CONFIG_DEBUG_INFO is not set CONFIG_DEBUG_VM=y # CONFIG_DEBUG_VIRTUAL is not set CONFIG_DEBUG_WRITECOUNT=y # CONFIG_DEBUG_MEMORY_INIT is not set CONFIG_DEBUG_LIST=y # CONFIG_TEST_LIST_SORT is not set CONFIG_DEBUG_SG=y CONFIG_DEBUG_NOTIFIERS=y CONFIG_DEBUG_CREDENTIALS=y CONFIG_ARCH_WANT_FRAME_POINTERS=y CONFIG_FRAME_POINTER=y CONFIG_BOOT_PRINTK_DELAY=y # CONFIG_RCU_TORTURE_TEST is not set CONFIG_RCU_CPU_STALL_TIMEOUT=60 # CONFIG_KPROBES_SANITY_TEST is not set # CONFIG_BACKTRACE_SELF_TEST is not set # CONFIG_DEBUG_BLOCK_EXT_DEVT is not set # CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set # CONFIG_DEBUG_PER_CPU_MAPS is not set # CONFIG_LKDTM is not set # CONFIG_CPU_NOTIFIER_ERROR_INJECT is not set CONFIG_FAULT_INJECTION=y CONFIG_FAILSLAB=y CONFIG_FAIL_PAGE_ALLOC=y CONFIG_FAIL_MAKE_REQUEST=y CONFIG_FAIL_IO_TIMEOUT=y CONFIG_FAULT_INJECTION_DEBUG_FS=y CONFIG_FAULT_INJECTION_STACKTRACE_FILTER=y CONFIG_LATENCYTOP=y CONFIG_SYSCTL_SYSCALL_CHECK=y CONFIG_DEBUG_PAGEALLOC=y CONFIG_USER_STACKTRACE_SUPPORT=y CONFIG_NOP_TRACER=y CONFIG_HAVE_FUNCTION_TRACER=y CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST=y CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_HAVE_SYSCALL_TRACEPOINTS=y CONFIG_HAVE_C_RECORDMCOUNT=y CONFIG_TRACER_MAX_TRACE=y CONFIG_RING_BUFFER=y CONFIG_EVENT_TRACING=y CONFIG_EVENT_POWER_TRACING_DEPRECATED=y CONFIG_CONTEXT_SWITCH_TRACER=y CONFIG_RING_BUFFER_ALLOW_SWAP=y CONFIG_TRACING=y CONFIG_GENERIC_TRACER=y CONFIG_TRACING_SUPPORT=y CONFIG_FTRACE=y # CONFIG_FUNCTION_TRACER is not set # CONFIG_IRQSOFF_TRACER is not set CONFIG_SCHED_TRACER=y CONFIG_FTRACE_SYSCALLS=y CONFIG_BRANCH_PROFILE_NONE=y # CONFIG_PROFILE_ANNOTATED_BRANCHES is not set # CONFIG_PROFILE_ALL_BRANCHES is not set # CONFIG_STACK_TRACER is not set CONFIG_BLK_DEV_IO_TRACE=y CONFIG_KPROBE_EVENT=y # CONFIG_FTRACE_STARTUP_TEST is not set CONFIG_MMIOTRACE=y # CONFIG_MMIOTRACE_TEST is not set CONFIG_RING_BUFFER_BENCHMARK=m # CONFIG_PROVIDE_OHCI1394_DMA_INIT is not set CONFIG_BUILD_DOCSRC=y CONFIG_DYNAMIC_DEBUG=y CONFIG_DMA_API_DEBUG=y # CONFIG_ATOMIC64_SELFTEST is not set # CONFIG_SAMPLES is not set CONFIG_HAVE_ARCH_KGDB=y CONFIG_KGDB=y CONFIG_KGDB_SERIAL_CONSOLE=y CONFIG_KGDB_TESTS=y # CONFIG_KGDB_TESTS_ON_BOOT is not set # CONFIG_KGDB_LOW_LEVEL_TRAP is not set # CONFIG_KGDB_KDB is not set CONFIG_HAVE_ARCH_KMEMCHECK=y # CONFIG_KMEMCHECK is not set # CONFIG_TEST_KSTRTOX is not set CONFIG_STRICT_DEVMEM=y # CONFIG_X86_VERBOSE_BOOTUP is not set CONFIG_EARLY_PRINTK=y CONFIG_EARLY_PRINTK_DBGP=y CONFIG_DEBUG_STACKOVERFLOW=y CONFIG_X86_PTDUMP=y # CONFIG_DEBUG_RODATA is not set # CONFIG_DEBUG_SET_MODULE_RONX is not set CONFIG_DEBUG_NX_TEST=m CONFIG_DOUBLEFAULT=y # CONFIG_IOMMU_STRESS is not set CONFIG_HAVE_MMIOTRACE_SUPPORT=y # CONFIG_X86_DECODER_SELFTEST is not set CONFIG_IO_DELAY_TYPE_0X80=0 CONFIG_IO_DELAY_TYPE_0XED=1 CONFIG_IO_DELAY_TYPE_UDELAY=2 CONFIG_IO_DELAY_TYPE_NONE=3 CONFIG_IO_DELAY_0X80=y # CONFIG_IO_DELAY_0XED is not set # CONFIG_IO_DELAY_UDELAY is not set # CONFIG_IO_DELAY_NONE is not set CONFIG_DEFAULT_IO_DELAY_TYPE=0 CONFIG_DEBUG_BOOT_PARAMS=y # CONFIG_CPA_DEBUG is not set CONFIG_OPTIMIZE_INLINING=y # CONFIG_DEBUG_STRICT_USER_COPY_CHECKS is not set
