Tymoteusz Kielan wrote:
Hello,
I'm new here, and I don't know how to start.
I'm trying to setup an x86 costom platform on Linux RT branch.
Today, I was able to get 2.6.19-rt1 and run some tests.
I wrote some module that uses RT API an during modprobe, some thing unexpexted
happened:
[EMAIL PROTECTED]:~# modprobe someModule
[ 257.391000] softirq-tasklet/8[CPU#0]: BUG in rt_mutex_debug_task_free at
kernel/rtmutex-debug.c:66
[ 257.391000] [<c0103e68>] dump_trace+0x82/0x20d
[ 257.391000] [<c01040cb>] show_trace_log_lvl+0x34/0x4a
[ 257.391000] [<c010410d>] show_trace+0x2c/0x2e
[ 257.391000] [<c010422a>] dump_stack+0x2b/0x2d
[ 257.391000] [<c011930b>] __WARN_ON+0x65/0x77
[ 257.391000] [<c0139c6a>] rt_mutex_debug_task_free+0x4b/0x88
[ 257.391000] [<c01151e4>] free_task+0x21/0x37
[ 257.391000] [<c01152bf>] __put_task_struct_cb+0xc5/0xcb
[ 257.391000] [<c0144c61>] rcu_process_callbacks+0x53/0x5e
[ 257.391000] [<c011d4fc>] __tasklet_action+0xc9/0xfc
[ 257.391000] [<c011d565>] tasklet_action+0x36/0x3b
[ 257.391000] [<c011d71c>] ksoftirqd+0xef/0x177
[ 257.391000] [<c012beb7>] kthread+0x90/0xb8
[ 257.391000] [<c0103d2f>] kernel_thread_helper+0x7/0x10
[ 257.391000] =======================
Looks to me like a task has exited while still holding a mutex.
This bug is not critical, but I don't know what to expect from kernel giving me
such
messages.
Is it my fault? This trace do not show any function calling from my someModule.
It probably is. We would know for sure if you showed us your module's
source.
Michal Schmidt
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