https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=243225
--- Comment #6 from Terry Kennedy <terry-free...@glaver.org> --- (In reply to Terry Kennedy from comment #5) Following up to my own post. I just emailed Warner Losh the following (forgetting that the discussion was also going on in this PR): The system is a Dell PowerEdge R730 with dual E5-2643 v3 CPUs, 128GB RAM, PERC H730 Mini RAID controller (for internal SAS drives) and a Dell "12Gb External SAS Adapter" (LSI SAS 3008) which is the problem controller. Since I emailed you last, Dell changed it again (they're getting irritated at this point) with no change. With a r364046 kernel from today, the system boots fine with hyper- threading enabled, but shows thenmprmhang with hyperthreading disabled. The previous kernel worked with hyperthreading disabled - as I've said, this appears to be timing-related as it first showed up after the LLVM 9.0.0 import into 12-STABLE. A verbose boot didn't appear to show anything, but as the kernel mes- sage buffer never gets written to disk because of the hang, I have to play the boot sequence back as a video from the internal remote manage- ment card. Also, sometimes a verbose boot works, since this is a timing- related Heisenbug, apparently. I have created a directory https://www.glaver.org/transient/imp which has (so far) dmesg.boot and pciconf.txt from a good boot, bootcapture_ bad.dvc from a non-hyperthreaded boot hang, bootcapture_good.dvc from a successful hyperthreaded boot. and videoplayer.zip which is the play- er for .dvc files. It contains a Windows .exe and a jar file and shell script for Linux (and presumably FreeBSD with Java and a GUI). I can provide remote access to the Dell iDRAC 8 Enterprise card which allows console viewing and all sorts of other stuff, like reset / power cycle and access to BIOS setup, etc. if needed. Let me know if there is anything else you need. -- 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"
