Hello,
I am developing a kernel module that schedules a task to run
in the scheduler queue (kernel is 2.4), and inside the task there is a
call
to tcp_sendmsg().
I have intermittent kernel crashes which seem to happen in alloc_skb()
(below is the output from ksymoops).
Is there anything wrong with calling tcp_sendmsg() from a task in the
scheduler queue?
Thanks,
Seva Tonkonoh
>>EIP; c012f10f <kmem_cache_alloc_batch+67/e0> <=====
>>ecx; c1c0da28 <_end+18a5138/11ce9710>
>>esi; c1c0da28 <_end+18a5138/11ce9710>
Trace; c012f2ea <kmem_cache_alloc+72/13c>
Trace; c01f996c <alloc_skb+cc/1bc>
Trace; c0213348 <tcp_sendmsg+23c/1140>
Trace; f899e5f8 <END_OF_CODE+268d1001/????>
Trace; c0115233 <schedule_timeout+83/a0>
Trace; c011d2ec <__run_task_queue+64/70>
Trace; c01250d7 <context_thread+137/1d0>
Trace; c0105684 <kernel_thread+28/38>
Code; c012f10f <kmem_cache_alloc_batch+67/e0>
00000000 <_EIP>:
Code; c012f10f <kmem_cache_alloc_batch+67/e0> <=====
0: 8b 44 81 18 mov 0x18(%ecx,%eax,4),%eax <=====
Code; c012f113 <kmem_cache_alloc_batch+6b/e0>
4: 03 59 0c add 0xc(%ecx),%ebx
Code; c012f116 <kmem_cache_alloc_batch+6e/e0>
7: 89 41 14 mov %eax,0x14(%ecx)
Code; c012f119 <kmem_cache_alloc_batch+71/e0>
a: 83 f8 ff cmp $0xffffffff,%eax
Code; c012f11c <kmem_cache_alloc_batch+74/e0>
d: 75 23 jne 32 <_EIP+0x32> c012f141
<kmem_cache_alloc_batch+99/e0>
Code; c012f11e <kmem_cache_alloc_batch+76/e0>
f: 8b 41 04 mov 0x4(%ecx),%eax
Code; c012f121 <kmem_cache_alloc_batch+79/e0>
12: 8b 11 mov (%ecx),%edx
-
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