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Date:      Mon, 2 Aug 2004 15:32:52 -0400
From:      John Baldwin <jhb@FreeBSD.org>
To:        freebsd-smp@FreeBSD.org
Cc:        freebsd-questions@FreeBSD.org
Subject:   Re: FreeBSD 5.2.1 kernel w/ SMP under high load = panic
Message-ID:  <200408021532.52817.jhb@FreeBSD.org>
In-Reply-To: <50335.81.84.175.12.1091365736.squirrel@81.84.175.12>
References:  <50335.81.84.175.12.1091365736.squirrel@81.84.175.12>

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On Sunday 01 August 2004 09:08 am, Hugo Silva wrote:
> I am running a Dual Xeon 2.8ghz w/ SMP, SCHED_ULE on FreeBSD
> 5.2.1-RELEASE-p9.
>
> Whenever I load the server a bit more (let seti@home run, compile stuff in
> multiple jails, etc), it will simple go offline. I confirmed with the
> datacenter and it is indeed a panic, but the datacenter didn't give me the
> panic message. I know for *sure* it's because of the high loads.

Hmm, we'd really need the panic message to even start debugging it.

> I need to sort this out, this is a powerful server being cut because of
> FreeBSD/SMP, and I know there is a kernel option to prevent the panic, I
> read about it ages ago on a forum. But I can't locate it. That user said
> if he disabled SMP, panics would stop. But another user suggested adding a
> kernel option (which I simply don't remember), and panics stopped, even
> with SMP.
>
> I tried KVA_PAGES=512, but it only caused another panic, this time as soon
> as the system started up..
>
> syncing disks, buffers remaining... panic: pmap_invalidate_range:
> interrupts disabled
> cpuid = 0;
> boot() called on cpu#0
> uptime: 9s

Unfortunately, I'd really need the backtrace to see how to fix this panic.

-- 
John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org



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