original_kernel/arch/x86/mm
Yinghai Lu 73cf624d02 x86, numa: For each node, register the memory blocks actually used
Russ reported SGI UV is broken recently. He said:

| The SRAT table shows that memory range is spread over two nodes.
|
| SRAT: Node 0 PXM 0 100000000-800000000
| SRAT: Node 1 PXM 1 800000000-1000000000
| SRAT: Node 0 PXM 0 1000000000-1080000000
|
|Previously, the kernel early_node_map[] would show three entries
|with the proper node.
|
|[    0.000000]     0: 0x00100000 -> 0x00800000
|[    0.000000]     1: 0x00800000 -> 0x01000000
|[    0.000000]     0: 0x01000000 -> 0x01080000
|
|The problem is recent community kernel early_node_map[] shows
|only two entries with the node 0 entry overlapping the node 1
|entry.
|
|    0: 0x00100000 -> 0x01080000
|    1: 0x00800000 -> 0x01000000

After looking at the changelog, Found out that it has been broken for a while by
following commit

|commit 8716273cae
|Author: David Rientjes <rientjes@google.com>
|Date:   Fri Sep 25 15:20:04 2009 -0700
|
|    x86: Export srat physical topology

Before that commit, register_active_regions() is called for every SRAT memory
entry right away.

Use nodememblk_range[] instead of nodes[] in order to make sure we
capture the actual memory blocks registered with each node.  nodes[]
contains an extended range which spans all memory regions associated
with a node, but that does not mean that all the memory in between are
included.

Reported-by: Russ Anderson <rja@sgi.com>
Tested-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <4CB27BDF.5000800@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: <stable@kernel.org> 2.6.33 .34 .35 .36
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2010-10-11 15:26:15 -07:00
..
kmemcheck
Makefile
dump_pagetables.c
extable.c
fault.c
gup.c
highmem_32.c
hugetlbpage.c
init.c
init_32.c
init_64.c
iomap_32.c
ioremap.c
k8topology_64.c
kmmio.c
memtest.c
mmap.c
mmio-mod.c
numa.c
numa_32.c
numa_64.c
pageattr-test.c
pageattr.c
pat.c
pat_internal.h
pat_rbtree.c
pf_in.c
pf_in.h
pgtable.c
pgtable_32.c
physaddr.c
physaddr.h
setup_nx.c
srat_32.c
srat_64.c x86, numa: For each node, register the memory blocks actually used 2010-10-11 15:26:15 -07:00
testmmiotrace.c
tlb.c