https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248659
--- Comment #6 from rkober...@gmail.com --- I had an epiphany yesterday and may have figured something that may help track this down. It appears that this is likely tied to the system disk which is an ATAPI (SATA) drive. I can keep the system from freezing indefinitely by either typing or moving the cursor. I realized that these two devices (kbd and psm) are , to the best of my knowledge, the last physical devices still GIANT locked ad the last ISA devices, as well. It is my suspicion that the GIANT lock happening now and then causes something to clear out that will eventually livelock the system. I previously noted that the disk transfer rate would deteriorate over time, leading to a livelock. I can now report that, if I see the transfer rate declining, I can suspend the job and, after a few seconds, the system returns to normal. If I let the problem continue for more than a few seconds, the keyboard will be locked up and the system will be livelocked and require a power down. I am unable to un-tar teh firefox source tarball or any other large tarball. Even with typing or moving the mouse, the transfer rate will start declining. I can suspend tat, but it sems to start declining again very soon whne the tar is resumed and I was unable to complete the restore. I have seen similar behavior with other large tarballs. Oddly, when copying from USB disk to system disk, I see similar issues, but a suspend seems to allow then to return to full speed for a while upon resume. Copies on the system disk to the system disk seem to be the worst problem. It also appears that an inactive system usually does not lock up. I can boot to the single-user or the login prompt and the system will remain usable for a long time. It does seem to eventually lock up, but it can take hours. It had never locked until I left it at the single-user prompt after it finished fscking the system. When I get back to the system today, after about 13 hours, it was frozen. Any suggestions on tracking this down would really be appreciated as this system is replacing an old one which has a failing fan and may become useless at any time. -- You are receiving this mail because: You are the assignee for the bug. _______________________________________________ freebsd-bugs@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-bugs To unsubscribe, send any mail to "freebsd-bugs-unsubscr...@freebsd.org"
