https://bugzilla.kernel.org/show_bug.cgi?id=217242 Austin Domino (austin.domino@xxxxxxxxxxx) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |austin.domino@xxxxxxxxxxx --- Comment #1 from Austin Domino (austin.domino@xxxxxxxxxxx) --- The same problem has been seen on Intel NUC7i5BNK, ASRock NUC BOX-1260P, LattePanda Delta 3 and other compact computers of the sort, and if enough individual processes are doing USB serial communications (ttyUSB/ttyACM) at once and it matches or exceeds the number of CPU cores, the entire CPU can get locked up until the watchdog frees things up. Most lock ups of this sort are resolved after ~20-25 seconds, but some have lasted over 20 minutes! There's several options to get around this problem. One of which is to set the CPU affinity so at least 1 core won't ever be used for USB serial communications. Another one is to use a semaphore to add a similar limitation. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
