[ltt-dev] Panic on SH with the Kernel 2.6.30.9

[peppe.cavallaro@st.com (Giuseppe CAVALLARO)]

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Hi Mathieu,

Mathieu Desnoyers wrote:
> You should probably try lttng 0.170 for kernel 2.6.31.6 instead. This
> version fixed a lot of bugs discovered by heavy stress-testing.
> 
> I think your problem comes from the new network synchronization markers
> added around there versions. They had incorrect type sizes for the event
> payload and therefore caused problems. They were fixed a few versions
> later. Just disabling the network "extra" instrumentation should also
> work.

Thanks for this info. Unfortunately,  at this moment, I cannot test
lttng on a Kernel newer than the 2.6.30.9 but I'll let you know if I
have any progresses.

Thanks
Peppe

> Thanks,
> 
> Mathieu
> 
> * Giuseppe CAVALLARO (peppe.cavallaro at st.com) wrote:
> Hi Mathieu,
> using lttng-0.162 with an STLinux kernel 2.6.30.9, I get a panic (see
> the log attached).
> I work on an STM board with an SH4-300 CPU (128MiB RAM).
> I mount a rooFS via NFS and run the following commands before having the
> panic.
> 
> $ ltt-armall
> $ lttctl -C -w /tmp/trace1 trace1 |-> ltt-control-0.75
> $ ls -lR /                        |-> After a few seconds I get
>                                   |-> the panic.
> 
> This is my Kernel configuration for LTT:
> CONFIG_LTT=y
> CONFIG_LTT_FILTER=y
> CONFIG_HAVE_LTT_DUMP_TABLES=y
> CONFIG_LTT_RELAY_ALLOC=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=y
> CONFIG_LTT_USERSPACE_EVENT=y
> CONFIG_LTT_VMCORE=y
> CONFIG_LTT_STATEDUMP=y
> CONFIG_LTT_ASCII=y
> 
> Problem happens when I turn-on LTT_TRACEPROBES at config time.
> 
> Welcome advice.
> 
> Regards,
> Peppe
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