8df5bb34de
numa=fake=N specifies the number of fake nodes, N, to partition the system into and then allocates them by interleaving over physical nodes. This requires knowledge of the system capacity when attempting to allocate nodes of a certain size: either very large nodes to benchmark scalability of code that operates on individual nodes, or very small nodes to find bugs in the VM. This patch introduces numa=fake=<size>[MG] so it is possible to specify the size of each node to allocate. When used, nodes of the size specified will be allocated and interleaved over the set of physical nodes. FAKE_NODE_MIN_SIZE was also moved to the more-appropriate include/asm/numa_64.h. Signed-off-by: David Rientjes <rientjes@google.com> LKML-Reference: <alpine.DEB.2.00.1002151342510.26927@chino.kir.corp.google.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
/* K8 NUMA support */
|
|
/* Copyright 2002,2003 by Andi Kleen, SuSE Labs */
|
|
/* 2.5 Version loosely based on the NUMAQ Code by Pat Gaughen. */
|
|
#ifndef _ASM_X86_MMZONE_64_H
|
|
#define _ASM_X86_MMZONE_64_H
|
|
|
|
|
|
#ifdef CONFIG_NUMA
|
|
|
|
#include <linux/mmdebug.h>
|
|
|
|
#include <asm/smp.h>
|
|
|
|
/* Simple perfect hash to map physical addresses to node numbers */
|
|
struct memnode {
|
|
int shift;
|
|
unsigned int mapsize;
|
|
s16 *map;
|
|
s16 embedded_map[64 - 8];
|
|
} ____cacheline_aligned; /* total size = 128 bytes */
|
|
extern struct memnode memnode;
|
|
#define memnode_shift memnode.shift
|
|
#define memnodemap memnode.map
|
|
#define memnodemapsize memnode.mapsize
|
|
|
|
extern struct pglist_data *node_data[];
|
|
|
|
static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
|
|
{
|
|
unsigned nid;
|
|
VIRTUAL_BUG_ON(!memnodemap);
|
|
nid = memnodemap[addr >> memnode_shift];
|
|
VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]);
|
|
return nid;
|
|
}
|
|
|
|
#define NODE_DATA(nid) (node_data[nid])
|
|
|
|
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
|
|
#define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \
|
|
NODE_DATA(nid)->node_spanned_pages)
|
|
#endif
|
|
#endif /* _ASM_X86_MMZONE_64_H */
|