kernel-ark/include/asm-ia64/numa.h
Ken'ichi Ohmichi fd59d231f8 Add vmcoreinfo
This patch set frees the restriction that makedumpfile users should install a
vmlinux file (including the debugging information) into each system.

makedumpfile command is the dump filtering feature for kdump.  It creates a
small dumpfile by filtering unnecessary pages for the analysis.  To
distinguish unnecessary pages, it needs a vmlinux file including the debugging
information.  These days, the debugging package becomes a huge file, and it is
hard to install it into each system.

To solve the problem, kdump developers discussed it at lkml and kexec-ml.  As
the result, we reached the conclusion that necessary information for dump
filtering (called "vmcoreinfo") should be embedded into the first kernel file
and it should be accessed through /proc/vmcore during the second kernel.
(http://www.uwsg.iu.edu/hypermail/linux/kernel/0707.0/1806.html)

Dan Aloni created the patch set for the above implementation.
(http://www.uwsg.iu.edu/hypermail/linux/kernel/0707.1/1053.html)

And I updated it for multi architectures and memory models.
(http://lists.infradead.org/pipermail/kexec/2007-August/000479.html)

Signed-off-by: Dan Aloni <da-x@monatomic.org>
Signed-off-by: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Signed-off-by: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-17 08:42:54 -07:00

81 lines
2.1 KiB
C

/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* This file contains NUMA specific prototypes and definitions.
*
* 2002/08/05 Erich Focht <efocht@ess.nec.de>
*
*/
#ifndef _ASM_IA64_NUMA_H
#define _ASM_IA64_NUMA_H
#ifdef CONFIG_NUMA
#include <linux/cache.h>
#include <linux/cpumask.h>
#include <linux/numa.h>
#include <linux/smp.h>
#include <linux/threads.h>
#include <asm/mmzone.h>
extern u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
extern cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;
extern pg_data_t *pgdat_list[MAX_NUMNODES];
/* Stuff below this line could be architecture independent */
extern int num_node_memblks; /* total number of memory chunks */
/*
* List of node memory chunks. Filled when parsing SRAT table to
* obtain information about memory nodes.
*/
struct node_memblk_s {
unsigned long start_paddr;
unsigned long size;
int nid; /* which logical node contains this chunk? */
int bank; /* which mem bank on this node */
};
struct node_cpuid_s {
u16 phys_id; /* id << 8 | eid */
int nid; /* logical node containing this CPU */
};
extern struct node_memblk_s node_memblk[NR_NODE_MEMBLKS];
extern struct node_cpuid_s node_cpuid[NR_CPUS];
/*
* ACPI 2.0 SLIT (System Locality Information Table)
* http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
*
* This is a matrix with "distances" between nodes, they should be
* proportional to the memory access latency ratios.
*/
extern u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES];
#define node_distance(from,to) (numa_slit[(from) * num_online_nodes() + (to)])
extern int paddr_to_nid(unsigned long paddr);
#define local_nodeid (cpu_to_node_map[smp_processor_id()])
extern void map_cpu_to_node(int cpu, int nid);
extern void unmap_cpu_from_node(int cpu, int nid);
#else /* !CONFIG_NUMA */
#define map_cpu_to_node(cpu, nid) do{}while(0)
#define unmap_cpu_from_node(cpu, nid) do{}while(0)
#define paddr_to_nid(addr) 0
#endif /* CONFIG_NUMA */
#endif /* _ASM_IA64_NUMA_H */