[Bug 264257] [tcp] Panic: Fatal trap 12: page fault while in kernel mode (if_io_tqg_4) - m_copydata ... at /usr/src/sys/kern/uipc_mbuf.c:659
- Go to: [ bottom of page ] [ top of archives ] [ this month ]
Date: Mon, 11 Jul 2022 08:51:09 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264257 --- Comment #78 from Michael Tuexen <tuexen@freebsd.org> --- From the pcap information we were able to reconstruct the packet sequence, but not the exact timing. Unfortunately, we were not able to reproduce the issue. However, it seems hard, to extend the pcap logging. So I suggest to use the BlackBox Logging instead. Could you: * Add options TCP_BLACKBOX to you kernel configuration file and recompile the kernel. You can remove the TCPPCAP option, if you want. * Add net.inet.tcp.bb.log_auto_all=1 net.inet.tcp.bb.log_auto_ratio=1 net.inet.tcp.bb.log_auto_mode=1 net.inet.tcp.bb.log_session_limit=200 This should enable BlackBox Logging on all TCP connections and it will the last 200 events per TCP connection stored in the end point. Once the system has crashed, please provide a core. This time we should not only get the packet being sent/received, but also internal TCP state variables and information about the retransmission timer. If this information is not enough, we can adhoc extend the TCP Black Box Logging. -- You are receiving this mail because: You are on the CC list for the bug. You are the assignee for the bug.