Dual Xeon 1.8 GHz with hyperthreading. 2 Gigs of Memory. Server ran 4.11 successfully in production for 5+ years. http://www.supermicro.com/products/system/1U/6013/SYS-6013P-8+.cfm Boot fails more than 50% of the time running 7.0/7.1. It often panics at the APIC initialization (at the beginning of boot). Less often, it locks up towards the end, at "Trying to mount root from ufs:/dev/mirror/gm0s1a". Panic'ced boots randomly report failures on two different AP#s (2 and 3) and two different PHY#s (6 and 7). See attached document. Disabling ACPI/hyperthreading has no effect. The only way to get the machine to boot consistently is to disable APIC (and so disable SMP). When APIC is disabled, machine boots 100% of the time. Verbose boot messages attached from one successful and two failed boots (search for Failed boot). Thanks M Fix: Disable APIC. Patch attached with submission follows: How-To-Repeat: Boot into version 7 kernel with APIC enabled.
State Changed From-To: open->feedback To submitter: a couple of questions: Forstly, did you jump straight from 4.11 to 7.x, or do you know if (e.g.) 6.x had the same issue? Also, if you answer "N" to the "Panic? (y/n)" question, does the machine boot and run successfully? Lastly, is there a pattern as to when the machine does and doesn't boot? For example, does it always boot or not from a power on (rather than a reset)?
Responsible Changed From-To: freebsd-bugs->gavin Track
The BIOS on the server is from 3/2002. The last released Supermicro BIOS is from 11/2003. I was incorrect about the model of the server (these boxes are remote). http://www.supermicro.com/products/system/1U/6012/SYS-6012P-6.cfm I disabled hyperthreading in the BIOS and the system will now boot reliably with an SMP 7.1 kernel (APIC enabled). I'm debating whether it's worth the trouble to update the BIOS when all I'm losing is two virtual processors.
For bugs matching the following criteria: Status: In Progress Changed: (is less than) 2014-06-01 Reset to default assignee and clear in-progress tags. Mail being skipped
Keyword: crash – in lieu of summary line prefix: [panic] * bulk change for the keyword * summary lines may be edited manually (not in bulk). Keyword descriptions and search interface: <https://bugs.freebsd.org/bugzilla/describekeywords.cgi>