Messages in this thread | | | Date | Wed, 15 Sep 2004 12:58:57 -0400 (EDT) | From | Ricky Beam <> | Subject | Re: 2.6.9 rc2 freezing |
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On Wed, 15 Sep 2004, Jeff Garzik wrote: >Lee Revell wrote: >> Anyway, if you are running anything on your server that breaks under >> PREEMPT, it will break anyway as soon as you add another processor. > >Incorrect. The spinlock behavior is very different.
Indeed. Enable PREEMPT (my default for some time now) and the machine will lockup after spewing pages of scheduling while atomic's. Disable PREEMPT and the machine is stable again:
[jfbeam:pts/2{2}]gir:~/[12:55pm]:uname -a Linux gir 2.6.9-SMP-rc2+BK@1.1455 #71 SMP BK[20040914173940] Tue Sep 14 16:14:33 EDT 2004 i686 athlon i386 GNU/Linux [jfbeam:pts/2{2}]gir:~/[12:55pm]:uptime 12:55pm up 19:54, 2 users, load average: 0.01, 0.02, 0.00 [jfbeam:pts/2{2}]gir:~/[12:55pm]:grep ^proc /proc/cpuinfo processor : 0 processor : 1
--Ricky
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