Hello, I disabled the CONFIG_LTT_STATEDUMP and have been able to run lttctl on my appln. Thank you !
However, i am now facing another issue when i try to insmod my fpga driver on the board. $ insmod fpga.ko BUG: unable to handle kernel NULL pointer dereference at 00000004 IP: [<c1049791>] marker_update_probe_range+0xa1/0x310 *pde = 00000000 Oops: 0000 [#1] PREEMPT LTT NESTING LEVEL : 0 last sysfs file: Modules linked in: fpga(+) Pid: 799, comm: insmod Not tainted (2.6.31.6-rt19 #4) H6037 EIP: 0060:[<c1049791>] EFLAGS: 00010203 CPU: 0 EIP is at marker_update_probe_range+0xa1/0x310 EAX: 00000000 EBX: 00000000 ECX: cff42aa0 EDX: cf2cf070 ESI: 00000000 EDI: c126bac8 EBP: fdc60fc0 ESP: cf0ddf14 DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068 preempt:00000000 Process insmod (pid: 799, ti=cf0dc000 task=cf2cf070 task.ti=cf0dc000) Stack: 00000000 00000000 cf0ddf7c 00000000 00047fd4 00000001 cff5d000 0000002b <0> c126baa8 00000000 c126bac8 fffffffe c1049a2a c10335b6 00000001 cff42aa0 <0> c1263ce0 c1263cf8 00000001 00000000 c103388a ffffffff 00000000 cff42aa0 Call Trace: [<c1049a2a>] ? marker_module_notify+0x2a/0x30 [<c10335b6>] ? notifier_call_chain+0x36/0x70 [<c103388a>] ? __blocking_notifier_call_chain+0x4a/0x70 [<c10338c7>] ? blocking_notifier_call_chain+0x17/0x20 [<c10436e6>] ? sys_init_module+0x86/0x220 [<c1002e44>] ? sysenter_do_call+0x12/0x26 Code: 08 08 0f 85 54 02 00 00 85 ff 0f 84 44 02 00 00 8b 53 28 8b 43 24 e8 0f 1a 00 00 89 f0 88 43 0c 83 c3 30 39 dd 0f 86 3f 01 00 00 <8b> 53 04 8b 03 e8 b5 f0 ff ff 85 c0 89 c7 0f 84 db 00 00 00 8b EIP: [<c1049791>] marker_update_probe_range+0xa1/0x310 SS:ESP 0068:cf0ddf14 CR2: 0000000000000004 ---[ end trace 0a7239d58be85cb5 ]--- Killed $ Clocksource tsc unstable (delta = 130894527 ns) Is this related to the tracer or a fault my fpga module ? Thanks in adv rachana On Tue, Mar 16, 2010 at 7:22 PM, Mathieu Desnoyers < [email protected]> wrote: > * Rachana Rao ([email protected]) wrote: > > Hello, > > > > I am using LTTng version 0.178 on linux 2.6.31.6 patched with rt prempt > > patch-2.6.31.6-rt19 > > LTT control version is 0.79 > > > > This is running on Celeron M 370 processor (1.5GHz) board. > > It seems to be caused by the ltt-statedump module, which can be disabled > with CONFIG_LTT_STATEDUMP=n. > > Make sure you have no warnings when ltt-statedump compiles.. maybe > there is a spinlock taken there that happens to become a raw spinlock in > RT... > > Thanks, > > Mathieu > > > > > *I am getting the following oops - > > * > > $ lttctl -C -w /home/app1/trace7 trace7 > > Linux Trace Toolkit Trace Control 0.79-01022010 > > > > Controlling trace : trace7 > > > > lttctl: Creating trace > > lttctl: Forking lttd > > Linux Trace Toolkit Trace Daemon 0.79-01022010 > > > > ReadingBUG: unable to handle kernel NULL pointer dereference at 00000008 > > IP: [<c10f4f0b>] plist_add+0x1b/0x90 > > *pde = 00000000 > > Oops: 0000 [#1] PREEMPT > > LTT NESTING LEVEL : 0 > > last sysfs file: > > Modules linked in: > > > > Pid: 839, comm: lttctl Not tainted (2.6.31.6-rt19 #3) H6037 > > EIP: 0060:[<c10f4f0b>] EFLAGS: 00010046 CPU: 0 > > EIP is at plist_add+0x1b/0x90 > > EAX: 00000004 EBX: c1266120 ECX: cf261e74 EDX: c1266120 > > ESI: cf261e7c EDI: cf2ce750 EBP: 00000008 ESP: cf261e18 > > DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068 preempt:00000002 > > Process lttctl (pid: 839, ti=cf260000 task=cf2ce750 task.ti=cf260000) > > Stack: > > cf261e88 cf261e68 c1265dfc cf2ce750 c1265e0c c103eb41 00000001 00000041 > > <0> cf261e74 cf261e68 c1266120 00000000 00000282 c1265dfc ffffffff > c11dd97c > > <0> 00000000 00000282 cec98cfc c1265e04 00000078 c1265dfc c1265dfc > c1265e04 > > Call Trace: > > [<c103eb41>] ? task_blocks_on_rt_mutex+0x141/0x1c0 > > [<c11dd97c>] ? rt_spin_lock_slowlock+0x18c/0x200 > > [<c10e4d9d>] ? ltt_statedump_start+0x2fd/0x7a0 > > [<c104a6ee>] ? marker_probe_cb+0x4e/0xc0 > > [<c10de3d2>] ? ltt_trace_start+0x122/0x270 > > [<c10e70e8>] ? enabled_write+0xd8/0x160 > > [<c10e7010>] ? enabled_write+0x0/0x160 > > [<c106dfd0>] ? vfs_write+0x90/0xc0 > > [<c106e173>] ? sys_write+0x53/0xf0 > > [<c1002eb1>] ? syscall_call+0x7/0xb > > Code: 04 89 50 10 8b 7c 24 08 83 c4 0c c3 8d 74 26 00 55 57 56 89 c6 53 > 89 > > d3 83 > > ec 04 8d 40 0c 3b 46 0c 89 04 24 75 67 8b 2b 8d 45 fc <8b> 50 04 0f 18 > 02 > > 90 39 > > dd 89 e9 74 1f 8b 3e 3b 7d fc 7c 18 90 > > EIP: [<c10f4f0b>] plist_add+0x1b/0x90 SS:ESP 0068:cf261e18 > > CR2: 0000000000000008 > > ---[ end trace 18077621483d0c39 ]--- > > note: lttctl[839] exited with preempt_count 2 > > from debugfs directory : /mnt/debugfs/ltt/trace7 > > Writing to trace directory : /home/app1/trace7 > > > > lttctl: Starting trace > > Killed > > > > $ Clocksource tsc unstable (delta = 146049025 ns) > > > > *Following are excerpts from the kernel config - > > > > *# > > # GCOV-based kernel profiling > > # > > # CONFIG_GCOV_KERNEL is not set > > # CONFIG_SLOW_WORK is not set > > CONFIG_LTT=y > > CONFIG_LTT_FILTER=y > > CONFIG_HAVE_LTT_DUMP_TABLES=y > > CONFIG_LTT_RELAY=y > > CONFIG_LTT_RELAY_LOCKLESS=y > > # CONFIG_LTT_RELAY_IRQOFF is not set > > # CONFIG_LTT_RELAY_LOCKED is not set > > CONFIG_LTT_SERIALIZE=y > > CONFIG_LTT_FAST_SERIALIZE=y > > CONFIG_LTT_TRACEPROBES=y > > CONFIG_LTT_TRACE_CONTROL=y > > CONFIG_LTT_TRACER=y > > CONFIG_LTT_ALIGNMENT=y > > CONFIG_LTT_CHECK_ARCH_EFFICIENT_UNALIGNED_ACCESS=y > > # CONFIG_LTT_DEBUG_EVENT_SIZE is not set > > CONFIG_LTT_USERSPACE_EVENT=y > > CONFIG_LTT_VMCORE=y > > CONFIG_LTT_STATEDUMP=y > > # CONFIG_LTT_ASCII is not set > > CONFIG_HAVE_IMMEDIATE=y > > CONFIG_IMMEDIATE=y > > CONFIG_HAVE_GENERIC_DMA_COHERENT=y > > CONFIG_SLABINFO=y > > CONFIG_RT_MUTEXES=y > > CONFIG_BASE_SMALL=0 > > CONFIG_MODULES=y > > CONFIG_MODULE_FORCE_LOAD=y > > CONFIG_MODULE_UNLOAD=y > > # CONFIG_MODULE_FORCE_UNLOAD is not set > > # CONFIG_MODVERSIONS is not set > > # CONFIG_MODULE_SRCVERSION_ALL is not set > > CONFIG_BLOCK=y > > # CONFIG_LBDAF is not set > > CONFIG_BLK_DEV_BSG=y > > # CONFIG_BLK_DEV_INTEGRITY is not set > > > > # > > # RCU Subsystem > > # > > # CONFIG_CLASSIC_RCU is not set > > # CONFIG_TREE_RCU is not set > > CONFIG_PREEMPT_RCU=y > > # CONFIG_RCU_TRACE is not set > > # CONFIG_TREE_RCU_TRACE is not set > > # CONFIG_PREEMPT_RCU_TRACE is not set > > # CONFIG_IKCONFIG is not set > > CONFIG_LOG_BUF_SHIFT=17 > > CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y > > CONFIG_HAVE_GET_CYCLES=y > > CONFIG_HAVE_TRACE_CLOCK=y > > # CONFIG_HAVE_TRACE_CLOCK_GENERIC is not set > > # CONFIG_HAVE_TRACE_CLOCK_32_TO_64 is not set > > # CONFIG_HAVE_UNSYNCHRONIZED_TSC is not set > > # CONFIG_GROUP_SCHED is not set > > # CONFIG_CGROUPS is not set > > # CONFIG_SYSFS_DEPRECATED_V2 is not set > > # CONFIG_RELAY is not set > > # CONFIG_NAMESPACES is not set > > # CONFIG_BLK_DEV_INITRD is not set > > # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set > > CONFIG_SYSCTL=y > > CONFIG_ANON_INODES=y > > CONFIG_EMBEDDED=y > > CONFIG_UID16=y > > CONFIG_SYSCTL_SYSCALL=y > > CONFIG_KALLSYMS=y > > # CONFIG_KALLSYMS_EXTRA_PASS is not set > > CONFIG_HOTPLUG=y > > CONFIG_PRINTK=y > > CONFIG_BUG=y > > CONFIG_ELF_CORE=y > > CONFIG_PCSPKR_PLATFORM=y > > CONFIG_BASE_FULL=y > > CONFIG_FUTEX=y > > CONFIG_EPOLL=y > > CONFIG_SIGNALFD=y > > CONFIG_TIMERFD=y > > CONFIG_EVENTFD=y > > CONFIG_SHMEM=y > > CONFIG_AIO=y > > CONFIG_HAVE_PERF_COUNTERS=y > > > > * > > * > > Do let me know if you need the entire .config file or any other details > > > > I would appreciate any kind of help with this issue. > > > > Thanks in adv > > rachana > > > _______________________________________________ > > ltt-dev mailing list > > [email protected] > > http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev > > > -- > Mathieu Desnoyers > Operating System Efficiency Consultant > EfficiOS Inc. > http://www.efficios.com >
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