Date: Fri, 5 Nov 2010 17:21:05 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-stable@freebsd.org Cc: Thomas Zander <thomas.e.zander@googlemail.com> Subject: Re: How to tell whether ECC (memory) is enabled? Message-ID: <201011051721.05898.jhb@freebsd.org> In-Reply-To: <AANLkTiktf5Ls1RRLgUcu2MpK8ymKaDBf=qp%2BiGAp2fx2@mail.gmail.com> References: <AANLkTiktf5Ls1RRLgUcu2MpK8ymKaDBf=qp%2BiGAp2fx2@mail.gmail.com>
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On Friday, November 05, 2010 12:09:14 pm Thomas Zander wrote: > Dear, > > is there any way to inspect a running STABLE machine for the presence > or state of ECC memory before an MCA "error detected" message actually > occurs? > In comparison when I quickly boot the machine in question with a Linux > live CD, I find (among other EDAC messages) the following output in > its dmesg: > > ... > EDAC amd64: ECC is enabled by BIOS, Proceeding with EDAC module initialization > ... > > During POST, die BIOS also tells me that ECC memory is installed, so > far so good. But I was a little surprised that the FreeBSD kernel > tells me absolutely nothing about it. Or do I have to tune loader.conf > variables? I think the EDAC register is using the registers for the QPI PCI buses. There is a driver now to export those PCI buses to the OS in 7.x+. However, someone would need to port the EDAC driver (or something similar) to work with those devices. -- John Baldwin
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