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Date: 23 Aug 2006 23:17:25 +0200 From: Andi Kleen <ak@...e.de> To: Björn Engelhardt <bjoern2@...eue.de> Cc: linux-kernel@...r.kernel.org Subject: Re: Kernel 2.6.17.8 on Quad AMD Opteron 852 with 16x 4GB Modules (64GB RAM) Björn Engelhardt <bjoern2@...eue.de> writes: > we upgraded a Server from 32 GB RAM to 64 GB. Now we try to get a > Linux (FC5) with kernel 2.6.17.8 on a Quad Opteron (852; 64bit)-system > with 16x 4GB modules to run. > With 32 GB (8x 4GB modules) the system starts without any problems, > but above I get kernelpanics. It 99.9+% likely a hardware or BIOS or power supply/VRM/cooling problem of some sort. So many DIMMs are quite stress full to the system and can expose issues which were hidden before. Or you might run into some other BIOS/hardware issue. You can post the exact text of the panics from a serial console if you want, but most likely you will get the same answer even then. I would start talking to your hardware vendor. > The output then gives me several memoryaddresses bevore the panic > appears. The board (a Tyan K8QW,model S4881) should support up to 64GB > Ram. A Memorytest under Linux recognizes the 64GB and continues > without an error. > I tried several BIOS-Settings. > Does the kernel support the new 4GB-Modules by 64GB Ram? The kernel doesn't know anything about DIMMs, it just gets a memory map from the BIOS. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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