Initialization of init_pid_ns.pid_cachep->nodelists[]

I'm working on a 2.6.24 kernel with SPINLOCK debug enabled I ran into a NULL pointer in nit_pid_ns.pid_cachep->nodelists[]. Problem occurs while creating the pid cache:

#0 panic (fmt=0xd01fd500 "kmem_list3 ==
NU"...) at /export/src/xtensa-2.6.24-smp/kernel/panic.c:77
#1 do_tune_cpucache (cachep=0xd3803f00, limit=0x20,
batchcount=0x10, shared=0x8) at /export/src/xtensa-2.6.24-smp/mm/slab.c:3962
#2 enable_cpucache
(cachep=0xd3803f00) at /export/src/xtensa-2.6.24-smp/mm/slab.c:4022
#3 setup_cpu_cache
(cachep=0xd3803f00) at /export/src/xtensa-2.6.24-smp/mm/slab.c:2088
#4 kmem_cache_create (name=0xd38054b4 "pid_1", size=0x48,
align=0x8, flags=0x12c00, ctor=0) at /export/src/xtensa-2.6.24-smp/mm/slab.c:2401
#5 create_pid_cachep
(nr_ids=0x1) at /export/src/xtensa-2.6.24-smp/kernel/pid.c:520
#6 pidmap_init
() at /export/src/xtensa-2.6.24-smp/kernel/pid.c:696
#7 start_kernel
() at /export/src/xtensa-2.6.24-smp/init/main.c:616
#8 _startup
() at /export/src/xtensa-2.6.24-smp/arch/xtensa/kernel/head.S:250

It appears that a kmem_cache is initialized in
set_up_list3s() to point to initkmem_list3[].
init_list() to a newly allocated list

Looks like setup_cpu_cache() above #3 didn't call set_up_list3s() due to g_cpucache_up being set to FULL. g_cpucache_up is set to FULL in kmem_cache_init() which was called from start_kernel() much earlier that the call to pidmap_init().

How was nodelist to this newly created kmem_cache for pids suppose to have been initialized by the time it gets here?

-piet

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