Re: 2.6.18-rc3-mm2

[Andrew Morton]

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:
> > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.18-rc3/2.6.18-rc3-mm2/
> 
> 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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