Re: 2.6.9 rc2 freezing

[Ricky Beam]

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@xxxxxx #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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