KDL log acquire for too long

PANIC: acquire_spinlock(): Failed to acquire spinlock 0xd231c99c for a long time!
Welcome to Kernel Debugging Land...
Thread 471 "w:467:qemacs" running on CPU 1
stack trace for thread 471 "w:467:qemacs"
    kernel stack: 0x80223000 to 0x80227000
      user stack: 0x7013d000 to 0x7017d000
frame               caller     <image>:function + offset
 0 80226ce8 (+  32) 801407fe   <kernel_x86> arch_debug_stack_trace + 0x12
 1 80226d08 (+  16) 800a0813   <kernel_x86> stack_trace_trampoline(NULL) + 0x0b
 2 80226d18 (+  12) 801324ee   <kernel_x86> arch_debug_call_with_fault_handler + 0x1b
 3 80226d24 (+  48) 800a237e   <kernel_x86> debug_call_with_fault_handler + 0x5a
 4 80226d54 (+  64) 800a0a2f   <kernel_x86> kernel_debugger_loop(0x80183257 "PANIC: ", 0x80164c20 "acquire_spinlock(): Failed to acquire spinlock %p for a long time!", 0x80226e00 "��1�$n"��*��~��,��Ѐ(H�0", int32: 1) + 0x217
 5 80226d94 (+  48) 800a0dab   <kernel_x86> kernel_debugger_internal(0x80183257 "PANIC: ", 0x80164c20 "acquire_spinlock(): Failed to acquire spinlock %p for a long time!", 0x80226e00 "��1�$n"��*��~��,��Ѐ(H�0", int32: 1) + 0x53
 6 80226dc4 (+  48) 800a2706   <kernel_x86> panic + 0x3a
 7 80226df4 (+  48) 80072ace   <kernel_x86> acquire_spinlock + 0x5e
 8 80226e24 (+  64) 800553e7   <kernel_x86> ConditionVariable<0xd087fb24>::_NotifyLocked(false, int32: 0) + 0xa7
 9 80226e64 (+  64) 8005530e   <kernel_x86> ConditionVariable<0xd087fb24>::_Notify(false, int32: 0) + 0x72
10 80226ea4 (+  96) 800696fc   <kernel_x86> read_port_etc + 0x45c
11 80226f04 (+  64) 8006a3e9   <kernel_x86> _user_read_port_etc + 0xd5
12 80226f44 (+ 100) 8013512f   <kernel_x86> handle_syscall + 0xdc
user iframe at 0x80226fa8 (end = 0x80227000)
 eax 0xd8          ebx 0x2406f68      ecx 0x7017bfa4  edx 0x62243114
 esi 0x4a5         edi 0x7017c00c     ebp 0x7017bfe0  esp 0x80226fdc
 eip 0x62243114 eflags 0x3202    user esp 0x7017bfa4
 vector: 0x63, error code: 0x0
13 80226fa8 (+   0) 62243114   <commpage> commpage_syscall + 0x04
14 7017bfe0 (+  48) 01b9530d   <libbe.so> BPrivate::LinkReceiver<0x18fd6360>::ReadFromPort(int64: 9223372036854775807) + 0x99
15 7017c010 (+  48) 01b95093   <libbe.so> BPrivate::LinkReceiver<0x18fd6360>::GetNextMessage(0x7017c088, int64: 9223372036854775807) + 0x47
16 7017c040 (+ 128) 004286c8   <_APP_> ServerWindow<0x18fccac0>::_MessageLooper(0x0) + 0x2fc
17 7017c0c0 (+  48) 00404b3c   <_APP_> MessageLooper<0x18fccac0>::_message_thread(NULL) + 0x28
18 7017c0f0 (+  48) 02361623   <libroot.so> _get_next_team_info (nearest) + 0x5f
19 7017c120 (+   0) 62243250   <commpage> commpage_thread_exit + 0x00
kdebug> spinlock 0xd231c99c
spinlock 0xd231c99c:
  locked from 0x8008577e