From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 12 Jun 2020 10:26:26 -0500 (CDT) From: Per Oberg Message-ID: <1293572894.22066.1591975586278.JavaMail.zimbra@wolfram.com> Subject: Exception #14 in kernel space when using rttcp MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: xenomai Hi list I get a massive amount of "swithching ... to secondary mode after exception= #14 in kernel-space ..." followed by a WARNING as shown below.=20 Can someone enlighten me regarding the meaning of exception #14 ? Is the "WARNING: CPU: 0 ..." the cause or the symptom ? It has a macro at f= d.c calling "XENO_WARN_ON(COBALT, fd->refs <=3D 0); This is for Xenomai 3.1 [ 133.458856] [Xenomai] switching RTTest to secondary mode after exception= #14 in kernel-space at 0xffffffff8145386e (pid 498) [ 133.461217] ------------[ cut here ]------------ [ 133.461218] WARNING: CPU: 0 PID: 199 at /usr/src/kernel/kernel/xenomai/r= tdm/fd.c:299 __put_fd+0x242/0x290 [ 133.461218] Modules linked in: rttcp rtudp rtipv4 intel_powerclamp intel= _rapl coretemp i915 e1000e rt_igb pcan(O) rtnet video fan thermal_sys [ 133.461225] CPU: 0 PID: 199 Comm: rtnet-stack Tainted: G O = 4.9.90-xeno-cobolt #1 [ 133.461226] Hardware name: Default string Default string/SKYBAY, BIOS 5.= 0.1.1 04/18/2016 [ 133.461226] I-pipe domain: Xenomai [ 133.461227] ffffc90000947d20 ffffffff81446d18 0000000000000000 00000000= 00000000 [ 133.461229] ffffffff81bb13f0 ffffc90000947d60 ffffffff81078461 0000012b= 00000001 [ 133.461231] 0000000000000000 0000000000000000 ffff88026194d000 00000000= 00000000 [ 133.461233] Call Trace: [ 133.461234] [] dump_stack+0xbf/0xe7 [ 133.461234] [] __warn+0xe1/0x100 [ 133.461235] [] warn_slowpath_null+0x1d/0x20 [ 133.461235] [] __put_fd+0x242/0x290 [ 133.461236] [] ? rtskb_pool_queue_tail+0xa6/0xd0 [rtn= et] [ 133.461236] [] rtdm_fd_unlock+0x96/0xc0 [ 133.461237] [] rt_ip_rcv+0x135/0x170 [rtipv4] [ 133.461237] [] rt_stack_deliver+0xf8/0x220 [rtnet] [ 133.461238] [] ? xnthread_map+0x330/0x330 [ 133.461238] [] rt_stack_mgr_task+0x70/0xa0 [rtnet] [ 133.461239] [] kthread_trampoline+0x73/0x120 [ 133.461240] [] kthread+0xd9/0xf0 [ 133.461240] [] ? kthread_park+0x60/0x60 [ 133.461241] [] ? do_syscall_64+0x82/0xf0 [ 133.461241] [] ret_from_fork+0x55/0x60 [ 133.461242] ---[ end trace c5197a4d8608bef3 ]--- Per =C3=96berg=20