https://community.nxp.com/t5/i-MX-Processors/imx8mp-%E8%B7%AF%E7%94%B1%E5%99%A8%E5%9B%9E%E7%8E%AF-%E5%AF%BC%E8%87%B4NETDEV-WATCHDOG%E5%A4%8D%E4%BD%8D-%E6%97%A0%E6%B3%95%E6%81%A2%E5%A4%8D/m-p/2140433#M239571 <P> 您好，请问下我们的a板和b板同时接到交换机，然后a-b互ping，交换机由于误操作出现了环网（一个网线的两端都接到了交换机上），内核出现问题了（直接重启，或者debug卡死等），<SPAN>详细log在附件</SPAN></P><P><SPAN>[ 314.850236] ------------[ cut here ]------------<BR />[ 314.854871] NETDEV WATCHDOG: ens3 (fec): transmit queue 0 timed out 3384 ms<BR />[ 314.861910] WARNING: CPU: 0 PID: 15 at net/sched/sch_generic.c:525 dev_watchdog+0x234/0x23c<BR />[ 314.870271] Modules linked in:<BR />[ 314.873329] CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.6.3-g9d3450dbcab9-dirty #71<BR />[ 314.881246] Hardware name: NXP i.MX8MPlus EVK board (DT)<BR />[ 314.886555] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)<BR />[ 314.893516] pc : dev_watchdog+0x234/0x23c<BR />[ 314.897528] lr : dev_watchdog+0x234/0x23c<BR />[ 314.901538] sp : ffff8000823e3c20<BR />[ 314.904850] x29: ffff8000823e3c20 x28: 0000000000000100 x27: ffff8000823e3cd0<BR />[ 314.911989] x26: ffff8000820d69c0 x25: 0000000000000d38 x24: ffff8000820d6000<BR />[ 314.919128] x23: 0000000000000000 x22: ffff0000055503dc x21: ffff000005550000<BR />[ 314.926266] x20: ffff00000589c400 x19: ffff000005550488 x18: 0000000000000006<BR />[ 314.933404] x17: ffff8000821b62e8 x16: 0000000073e4d9ea x15: ffff8000823e3640<BR />[ 314.940541] x14: 0000000000000000 x13: ffff8000820f0da0 x12: 0000000000000672<BR />[ 314.947679] x11: 0000000000000226 x10: ffff800082148da0 x9 : ffff8000820f0da0<BR />[ 314.954818] x8 : 00000000ffffefff x7 : ffff800082148da0 x6 : 80000000fffff000<BR />[ 314.961956] x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000<BR />[ 314.969093] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff00000412d880</SPAN></P> Fri, 25 Jul 2025 01:33:20 GMT yrj 2025-07-25T01:33:20Z https://community.nxp.com/t5/i-MX-Processors/imx8mp-%E8%B7%AF%E7%94%B1%E5%99%A8%E5%9B%9E%E7%8E%AF-%E5%AF%BC%E8%87%B4NETDEV-WATCHDOG%E5%A4%8D%E4%BD%8D-%E6%97%A0%E6%B3%95%E6%81%A2%E5%A4%8D/m-p/2140433#M239571 <P> 您好，请问下我们的a板和b板同时接到交换机，然后a-b互ping，交换机由于误操作出现了环网（一个网线的两端都接到了交换机上），内核出现问题了（直接重启，或者debug卡死等），<SPAN>详细log在附件</SPAN></P><P><SPAN>[ 314.850236] ------------[ cut here ]------------<BR />[ 314.854871] NETDEV WATCHDOG: ens3 (fec): transmit queue 0 timed out 3384 ms<BR />[ 314.861910] WARNING: CPU: 0 PID: 15 at net/sched/sch_generic.c:525 dev_watchdog+0x234/0x23c<BR />[ 314.870271] Modules linked in:<BR />[ 314.873329] CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.6.3-g9d3450dbcab9-dirty #71<BR />[ 314.881246] Hardware name: NXP i.MX8MPlus EVK board (DT)<BR />[ 314.886555] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)<BR />[ 314.893516] pc : dev_watchdog+0x234/0x23c<BR />[ 314.897528] lr : dev_watchdog+0x234/0x23c<BR />[ 314.901538] sp : ffff8000823e3c20<BR />[ 314.904850] x29: ffff8000823e3c20 x28: 0000000000000100 x27: ffff8000823e3cd0<BR />[ 314.911989] x26: ffff8000820d69c0 x25: 0000000000000d38 x24: ffff8000820d6000<BR />[ 314.919128] x23: 0000000000000000 x22: ffff0000055503dc x21: ffff000005550000<BR />[ 314.926266] x20: ffff00000589c400 x19: ffff000005550488 x18: 0000000000000006<BR />[ 314.933404] x17: ffff8000821b62e8 x16: 0000000073e4d9ea x15: ffff8000823e3640<BR />[ 314.940541] x14: 0000000000000000 x13: ffff8000820f0da0 x12: 0000000000000672<BR />[ 314.947679] x11: 0000000000000226 x10: ffff800082148da0 x9 : ffff8000820f0da0<BR />[ 314.954818] x8 : 00000000ffffefff x7 : ffff800082148da0 x6 : 80000000fffff000<BR />[ 314.961956] x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000<BR />[ 314.969093] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff00000412d880</SPAN></P> Fri, 25 Jul 2025 01:33:20 GMT https://community.nxp.com/t5/i-MX-Processors/imx8mp-%E8%B7%AF%E7%94%B1%E5%99%A8%E5%9B%9E%E7%8E%AF-%E5%AF%BC%E8%87%B4NETDEV-WATCHDOG%E5%A4%8D%E4%BD%8D-%E6%97%A0%E6%B3%95%E6%81%A2%E5%A4%8D/m-p/2140433#M239571 yrj 2025-07-25T01:33:20Z