Red Hat Bugzilla – Bug 477236
CPU stuck: soft lockup
Last modified: 2009-07-14 11:53:53 EDT
Description of problem:
16-way (4x4) Opteron (Supermicro mobo) locked up 2 hours after OS install.
Version-Release number of selected component (if applicable):
kernel-126.96.36.199-53.fc9.x86_64, current versions of everything as of 2008/12/19 (ran yum update after initial install)
Disk i/o seems to be the trigger: it happened when makewhatis ran for the first time.
Created attachment 327488 [details]
Created attachment 327489 [details]
You may have run into the TLB bug. I have just been having trouble with that myself, I believe. If you are happy to try it at your own risk, the following attachment may help. You might need to add a line to the switch statement for your cpuid: stepping "03" (from your log) isn't listed in AMD's K10 Revision Guide.
Created attachment 343243 [details]
C++ program to enable workarounds for the TLB Bug and other AMD K10 errata - use at your own risk!
Interesting. Thing is, we "upgraded" machines that did lock up (not all did -- from about 20 bough at the same time) from Fedora 9 to CentOS 5 and they've been up for a couple of months now. So I'm filing this for future refence, but at this moment they're not broken anymore. Thanks.
Update: I have just finished testing the same CPU (B3 stepping) on a Foxconn A6VMX motherboard (without enabling the erratum 298 workarounds) and it passed just fine. So I need to use the previously attached code to prevent lockups on one manufacturer's motherboard, but not on another's. Presumably a BIOS or hardware bug somewhere in the first system. Glad your systems are working too.
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