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51b361b400
linux/arch/x86/mm
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Yinghai Lu 51b361b400 x86-64, NUMA: Fix numa_emulation code with node0 without RAM 
On one system that does not have RAM on node0.

When numa_emulation is compiled in, and
1. boot system without numa=fake...
2. or boot system with numa=fake=128 to make emulation fail

will get:

[    0.092026] ------------[ cut here ]------------
[    0.096005] kernel BUG at arch/x86/mm/numa_emulation.c:439!
[    0.096005] invalid opcode: 0000 [#1] SMP
[    0.096005] last sysfs file:
[    0.096005] CPU 0
[    0.096005] Modules linked in:
[    0.096005]
[    0.096005] Pid: 0, comm: swapper Not tainted 2.6.38-rc6-tip-yh-03869-gcb0491d-dirty #684 Sun Microsystems     Sun Fire X4240/Sun Fire X4240
[    0.096005] RIP: 0010:[<ffffffff81cdc65b>]  [<ffffffff81cdc65b>] numa_add_cpu+0x56/0xcf
[    0.096005] RSP: 0000:ffffffff82437ed8  EFLAGS: 00010246
...
[    0.096005] Call Trace:
[    0.096005]  [<ffffffff81cd7931>] identify_cpu+0x2d7/0x2df
[    0.096005]  [<ffffffff827e54fa>] identify_boot_cpu+0x10/0x30
[    0.096005]  [<ffffffff827e5704>] check_bugs+0x9/0x2d
[    0.096005]  [<ffffffff827dceda>] start_kernel+0x3d7/0x3f1
[    0.096005]  [<ffffffff827dc2cc>] x86_64_start_reservations+0x9c/0xa0
[    0.096005]  [<ffffffff827dc4ad>] x86_64_start_kernel+0x1dd/0x1e8
[    0.096005] Code: 74 06 48 8d 04 90 eb 0f 48 c7 c0 30 d9 00 00 48 03 04 d5 90 0f 60 82 8b 00 83 f8 ff 74 0d 0f a3 05 8b 7e 92 00 19 d2 85 d2 75 02 <0f> 0b 48 98 be 00 01 00 00 48 c7 c7 e0 44 60 82 44 8b 2c 85 e0
[    0.096005] RIP  [<ffffffff81cdc65b>] numa_add_cpu+0x56/0xcf
[    0.096005]  RSP <ffffffff82437ed8>
[    0.096026] ---[ end trace a7919e7f17c0a725 ]---

We need to use early_cpu_to_node() directly, because numa_cpu_node()
will return node0 that is not onlined.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
2011-03-04 14:49:28 +01:00
..
kmemcheck x86: Eliminate bp argument from the stack tracing routines 2010-11-18 14:37:34 +01:00
amdtopology_64.c x86-64, NUMA: Unify emulated distance mapping 2011-02-16 17:11:10 +01:00
dump_pagetables.c x86, mm: Create symbolic index into address_markers array 2010-07-20 16:56:19 -07:00
extable.c x86, 64-bit: Move K8 B step iret fixup to fault entry asm 2009-10-12 18:29:46 +02:00
fault.c x86: access_error API cleanup 2010-10-26 16:52:09 -07:00
gup.c thp: mmu_notifier_test_young 2011-01-13 17:32:46 -08:00
highmem_32.c mm: fix race in kunmap_atomic() 2010-10-27 18:03:05 -07:00
hugetlbpage.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
init_32.c x86: Rename e820_table_* to pgt_buf_* 2011-02-24 14:52:18 +01:00
init_64.c x86-64, NUMA: Revert NUMA affine page table allocation 2011-03-04 10:26:36 +01:00
init.c x86: Rename e820_table_* to pgt_buf_* 2011-02-24 14:52:18 +01:00
iomap_32.c mm: fix race in kunmap_atomic() 2010-10-27 18:03:05 -07:00
ioremap.c xen: Cope with unmapped pages when initializing kernel pagetable 2010-10-13 16:07:13 -07:00
kmmio.c x86, kmmio/mmiotrace: Fix double free of kmmio_fault_pages 2010-06-18 11:30:09 +02:00
Makefile x86-64, NUMA: Move NUMA emulation into numa_emulation.c 2011-02-22 11:10:08 +01:00
memblock.c x86, memblock: Remove __memblock_x86_find_in_range_size() 2010-10-05 21:45:43 -07:00
memtest.c x86, memblock: Replace e820_/_early string with memblock_ 2010-08-27 11:13:47 -07:00
mmap.c x86: Use helpers for rlimits 2010-01-27 15:17:31 -08:00
mmio-mod.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
numa_32.c x86, NUMA: Move *_numa_init() invocations into initmem_init() 2011-02-16 12:13:06 +01:00
numa_64.c x86-64, NUMA: Revert NUMA affine page table allocation 2011-03-04 10:26:36 +01:00
numa_emulation.c x86-64, NUMA: Fix numa_emulation code with node0 without RAM 2011-03-04 14:49:28 +01:00
numa_internal.h x86-64, NUMA: Move NUMA emulation into numa_emulation.c 2011-02-22 11:10:08 +01:00
numa.c x86, numa: Add error handling for bad cpu-to-node mappings 2011-02-14 13:29:27 +01:00
pageattr-test.c x86: make sure the CPA test code's use of _PAGE_UNUSED1 is obvious 2008-09-05 17:09:57 +02:00
pageattr.c x86, nx: Don't force pages RW when setting NX bits 2011-02-02 16:02:36 -08:00
pat_internal.h x86, pat: Fix memory leak in free_memtype 2010-05-26 11:26:04 -07:00
pat_rbtree.c rbtree: Undo augmented trees performance damage and regression 2010-07-05 14:43:50 +02:00
pat.c Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-08-06 10:17:52 -07:00
pf_in.c x86,mmiotrace: Add support for tracing STOS instruction 2010-08-02 01:32:01 +02:00
pf_in.h x86 mmiotrace: move files into arch/x86/mm/. 2008-05-24 11:25:37 +02:00
pgtable_32.c x86: remove last traces of quicklist usage 2010-05-24 13:33:31 -07:00
pgtable.c thp: add x86 32bit support 2011-01-13 17:32:44 -08:00
physaddr.c x86: split __phys_addr out into separate file 2009-09-10 11:48:55 -07:00
physaddr.h x86: split __phys_addr out into separate file 2009-09-10 11:48:55 -07:00
setup_nx.c x86, cpu: Only CPU features determine NX capabilities 2010-11-10 15:43:15 -08:00
srat_32.c x86: Unify cpu/apicid <-> NUMA node mapping between 32 and 64bit 2011-01-28 14:54:09 +01:00
srat_64.c x86-64, NUMA: Unify emulated distance mapping 2011-02-16 17:11:10 +01:00
testmmiotrace.c x86, kmmio/mmiotrace: Fix double free of kmmio_fault_pages 2010-06-18 11:30:09 +02:00
tlb.c x86: Avoid tlbstate lock if not enough cpus 2011-02-14 13:03:08 +01:00