* Mathieu Desnoyers ([email protected]) wrote: > * Avik Sil ([email protected]) wrote: > > Hi Mathieu, > > > > Now as the ARM patch is in, I'm able to generate trace and read the > > trace with babeltrace on Pandaboard. But while enabling the events, I > > get following output: > > > > # lttng enable-event -a -k > > [ 4304.827819] BUG: spinlock bad magic on CPU#1, ltt-sessiond/1305 > > [ 4304.841735] lock: 81453c00, .magic: 00000000, .owner: <none>/-1, > > .owner_cpu: 0 > > [ 4304.857421] [<800110ad>] (unwind_backtrace+0x1/0x90) from > > [<8022c847>] (do_raw_spin_lock+0x17/0xfc) > > [ 4304.875213] [<8022c847>] (do_raw_spin_lock+0x17/0xfc) from > > [<7f97c30f>] (channel_create+0xd6/0x158 [lib_ring_buffer]) > > [ 4304.894866] [<7f97c30f>] (channel_create+0xd6/0x158 > > [lib_ring_buffer]) from [<7f99856b>] (_channel_create+0x28/0x32 > > [ltt_ring_buffer_client_discard]) > > [ 4304.917755] [<7f99856b>] (_channel_create+0x28/0x32 > > [ltt_ring_buffer_client_discard]) from [<7f98b507>] > > (ltt_channel_create+0x12a/0x190 [ltt_relay]) > > [ 4304.940551] [<7f98b507>] (ltt_channel_create+0x12a/0x190 [ltt_relay]) > > from [<7f98c34b>] (lttng_abi_create_channel+0xba/0x158 [ltt_relay]) > > [ 4304.962341] [<7f98c34b>] (lttng_abi_create_channel+0xba/0x158 > > [ltt_relay]) from [<7f98c43f>] (lttng_session_ioctl+0x56/0x64 [ltt_relay]) > > [ 4304.984436] [<7f98c43f>] (lttng_session_ioctl+0x56/0x64 [ltt_relay]) > > from [<800baa49>] (do_vfs_ioctl+0x1a5/0x1dc) > > [ 4305.004394] [<800baa49>] (do_vfs_ioctl+0x1a5/0x1dc) from [<800baab3>] > > (sys_ioctl+0x33/0x4c) > > [ 4305.022369] [<800baab3>] (sys_ioctl+0x33/0x4c) from [<8000c2c1>] > > (ret_fast_syscall+0x1/0x50) > > All kernel events are enabled in channel channel0 > > > > Can you please look into this issue? > > Yes, it looks like I missed a spinlock initialization in there. Can you > try with the following commit applied ? > > commit 6fb8de4b6c1e8dcc69ff6f67310c5cf29718101a > Author: Mathieu Desnoyers <[email protected]> > Date: Wed Sep 21 10:08:34 2011 -0400 > > lib ring buffer frontend: add missing lock initialization
Silly me. Also make sure you have commit 02a766bbaa8b112e87d88aa4a70a507f5a6deb99, which marks the new init function as a module_init(). Thanks, Mathieu > > Thanks, > > Mathieu > > > > > Regards, > > Avik > > > > On Sunday 11 September 2011 01:19 AM, Mathieu Desnoyers wrote: > > > * Avik Sil ([email protected]) wrote: > > >> Hi, > > >> > > >> I'm trying to use LTTng 2.0 on a Pandaboard. After building the latest > > >> tools and modules I tried to run lttng and got following error: > > >> > > >> # lttng list -k > > [...] > > > > > > Hi Avik, > > > > > > Can I get your kernel .config ? Also, adding a printk in lttng-modules > > > wrapper/vmalloc.h, just after vmalloc_sync_all_sym = (void *) > > > kallsyms_lookup_name("vmalloc_sync_all"); > > > > > > printing the vmalloc_sync_all_sym pointer value would be clearly > > > helpful. I would think ARM does not implement vmalloc_sync_all, so the > > > dummy mm/vmalloc.c vmalloc_sync_all weak symbol should be used as a > > > valid empty function. Please grep for vmalloc_sync_all under your > > > arch/arm to see if your particular omap flavor is implementing a > > > vmalloc_sync_all. > > > > > > Thanks! > > > > > > Mathieu > > > > > >> > > >> Regards, > > >> Avik > > >> > > >> _______________________________________________ > > >> ltt-dev mailing list > > >> [email protected] > > >> http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev > > >> > > > > > > > -- > Mathieu Desnoyers > Operating System Efficiency R&D Consultant > EfficiOS Inc. > http://www.efficios.com > > _______________________________________________ > ltt-dev mailing list > [email protected] > http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev > -- Mathieu Desnoyers Operating System Efficiency R&D Consultant EfficiOS Inc. http://www.efficios.com _______________________________________________ ltt-dev mailing list [email protected] http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
