Re: 2.6.18-rt1
- From: Lee Revell <rlrevell@xxxxxxxxxxx>
- Date: Sat, 30 Sep 2006 14:25:55 -0400
On Sat, 2006-09-30 at 23:48 +0530, Dipankar Sarma wrote:
On Sat, Sep 30, 2006 at 02:06:04PM -0400, Lee Revell wrote:
I got this Oops with -rt3, looks RCU related. Apologies in advance if
it's already known.
Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP:
[<ffffffff802aafa7>] __rcu_read_unlock+0x2e/0x82
PGD 46a3067 PUD 4e27067 PMD 0
Oops: 0002 [1] PREEMPT SMP
CPU 1
I see a very similar crash while running rcutorture on 2.6.18-mm1 and
my rcu patchset that has rcupreempt stuff rom -rt. I don't see this
while running on 2.6.18-rc3, but then rc3 had an older version
of rcutorture. I am working on narrowing it down.
The following script reproduces the problem quickly (within
a couple of minutes) in my 4-cpu x86_64 system -
Let me know if you want more info such as config. I was compiling a
kernel when the Oops occurred. System is Athlon X2.
Lee
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- References:
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- From: Ingo Molnar
- Re: 2.6.18-rt1
- From: Lee Revell
- Re: 2.6.18-rt1
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