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Bug #2697

closed

i386 MP locks up during boot after MI interrupts, TSC related?

Added by davshao over 10 years ago. Updated about 10 years ago.

Status:
Resolved
Priority:
Normal
Assignee:
-
Category:
-
Target version:
-
Start date:
07/07/2014
Due date:
% Done:

0%

Estimated time:

Description

On three systems running i386 3.9-DEVELOPMENT with either multiple cores or with hyperthreading, following

commit 1a1ada88346625b2b581e0676eea4df99f1b89b6
Date: Sun Jul 6 12:49:22 2014 -0700

boot - Fix timecount issues with some BIOSes

(haven't completely bisected, might be the previous commit)
booting freezes some time after

Initialize MI interrupts

For example on an Intel Atom:

Initialize MI interrupts
objcache: magazine cap [13, 141]
Finish MP startup
Active CPU Mask: 00000003

On a Asrock Z77M (Intel i3):

Initialize MI interrupts
objcache: magazine cap [13, 141]
Finish MP startup
Active CPU Mask: 0000000f
TSC testing MP synchronization
TSC is MP synchronized, after 57322 tries

On the other hand, the problem does not manifest on a true single processor i386 Pentium 4 machine.

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Also available in: Atom PDF