Re: [BUG] i386 2.6.18 cpu_up: attempt to bring up CPU 4 failed : kernel BUG at mm/slab.c:2698!

KAMEZAWA Hiroyuki
2006-09-22T02:21:50Z

On Thu, 21 Sep 2006 18:34:03 -0700
keith mannthey <kmannth@us.ibm.com> wrote:

> That unhappy caller in the chain is cpuup_callback in mm/slab.c. I am
> still working out as to why, there is a lot going on if this function.
>
> > b) pageset_cpuup_callback()'s CPU_UP_CANCELED path possibly hasn't been
> > tested before. I'd be guessing that we're not zeroing out the
> > zone.pageset[] array when the `struct zone' is first allocated, but I
> > don't immediately recall where that code lives.
>

How about here ?
== at boot time in mm/page_alloc.c ==
free_area_init_core()
->zone_pcp_init(zone);
for (cpu = 0; cpu < NR_CPUS; cpu++) {
#ifdef CONFIG_NUMA
/* Early boot. Slab allocator not functional yet */
zone_pcp(zone, cpu) = &boot_pageset[cpu];
setup_pageset(&boot_pageset[cpu],0);
#else
setup_pageset(zone_pcp(zone,cpu), batch);
#endif
}
==================

Not zero-cleared.

-Kame