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Date: Mon, 1 Feb 2010 16:04:42 +0100 From: Borislav Petkov <petkovbb@...glemail.com> To: zhiyi <zhuang@...otago.ac.nz> Cc: linux-kernel@...r.kernel.org, Zhiyi Huang <hzy@...otago.ac.nz>, jkmair@...otago.ac.nz Subject: Re: nr_cpu_ids incorrect on AMD Quad-Core Opteron 8380 On Mon, Feb 1, 2010 at 2:57 PM, Borislav Petkov <petkovbb@...glemail.com> wrote: > On Sun, Jan 31, 2010 at 11:59 PM, zhiyi <zhuang@...otago.ac.nz> wrote: >> My module worked for a kernel 2.6.29 with CONFIG_NR_CPUS=64 on my dual >> quad-core AMD Opteron. The value of nr_cpu_ids I got from the same module >> was correct (8). > > This could mean that your include/generated/autoconf.h, which is used by > external modules, is not updated and contains CONFIG_NR_CPUS=8. Do > > make mrproper > > in your kernel directory by moving your .config out of the way first and > then rebuild your kernel and external module(s). nr_cpu_ids should pick > up the updated CONFIG_NR_CPUS value from your .config. That's actually not necessary - the nr_cpu_ids thing is set at compile time to CONFIG_NR_CPUS but then capped to a possibly lower value upon boot depending on the info in the ACPI mptables. Can you please send the .config and the full dmesg of the quadsocket machine? Thanks. -- Regards/Gruss, Boris -- 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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