Re: 2.6.18-rc3-mm2

From: Andrew Morton
Date: Fri Aug 11 2006 - 14:33:46 EST

On Fri, 11 Aug 2006 11:11:40 -0700
Mark Haverkamp <markh@xxxxxxxx> wrote:

> On Sun, 2006-08-06 at 03:08 -0700, Andrew Morton wrote:
> >
> I am seeing problem loading modules at boot time. My initrd tries to
> load scsi_mod and percpu_modalloc prints this;
> Could not allocate 16 bytes percpu data
> This is a 2 processor x86_64 machine. I have attached the output from
> the serial console and the config file.
> It is related to the mm patches. I can boot OK from the main kernel
> tree and the scsi trees.

Yeah, sorry - this is almost certainly due to the increase in NR_IRQS. It
made this, in include/linux/kernel_stat.h

DECLARE_PER_CPU(struct kernel_stat, kstat);

really big and we consume all the per-cpu memory.

NR_IRQS is (sometimes) calculated from NR_CPUS via complex means. Reducing
your NR_CPUS should fix things up.

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