mirror of
https://github.com/torvalds/linux.git
synced 2024-11-18 18:11:56 +00:00
cb83b629ba
The current code groups up to 16 nodes in a level and then puts an ALLNODES domain spanning the entire tree on top of that. This doesn't reflect the numa topology and esp for the smaller not-fully-connected machines out there today this might make a difference. Therefore, build a proper numa topology based on node_distance(). Since there's no fixed numa layers anymore, the static SD_NODE_INIT and SD_ALLNODES_INIT aren't usable anymore, the new code tries to construct something similar and scales some values either on the number of cpus in the domain and/or the node_distance() ratio. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Anton Blanchard <anton@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: David Howells <dhowells@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: linux-alpha@vger.kernel.org Cc: linux-ia64@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-sh@vger.kernel.org Cc: Matt Turner <mattst88@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Richard Henderson <rth@twiddle.net> Cc: sparclinux@vger.kernel.org Cc: Tony Luck <tony.luck@intel.com> Cc: x86@kernel.org Cc: Dimitri Sivanich <sivanich@sgi.com> Cc: Greg Pearson <greg.pearson@hp.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: bob.picco@oracle.com Cc: chris.mason@oracle.com Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/n/tip-r74n3n8hhuc2ynbrnp3vt954@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
#ifndef _ASM_POWERPC_TOPOLOGY_H
|
|
#define _ASM_POWERPC_TOPOLOGY_H
|
|
#ifdef __KERNEL__
|
|
|
|
|
|
struct device;
|
|
struct device_node;
|
|
|
|
#ifdef CONFIG_NUMA
|
|
|
|
/*
|
|
* Before going off node we want the VM to try and reclaim from the local
|
|
* node. It does this if the remote distance is larger than RECLAIM_DISTANCE.
|
|
* With the default REMOTE_DISTANCE of 20 and the default RECLAIM_DISTANCE of
|
|
* 20, we never reclaim and go off node straight away.
|
|
*
|
|
* To fix this we choose a smaller value of RECLAIM_DISTANCE.
|
|
*/
|
|
#define RECLAIM_DISTANCE 10
|
|
|
|
#include <asm/mmzone.h>
|
|
|
|
static inline int cpu_to_node(int cpu)
|
|
{
|
|
return numa_cpu_lookup_table[cpu];
|
|
}
|
|
|
|
#define parent_node(node) (node)
|
|
|
|
#define cpumask_of_node(node) ((node) == -1 ? \
|
|
cpu_all_mask : \
|
|
node_to_cpumask_map[node])
|
|
|
|
struct pci_bus;
|
|
#ifdef CONFIG_PCI
|
|
extern int pcibus_to_node(struct pci_bus *bus);
|
|
#else
|
|
static inline int pcibus_to_node(struct pci_bus *bus)
|
|
{
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
#define cpumask_of_pcibus(bus) (pcibus_to_node(bus) == -1 ? \
|
|
cpu_all_mask : \
|
|
cpumask_of_node(pcibus_to_node(bus)))
|
|
|
|
extern int __node_distance(int, int);
|
|
#define node_distance(a, b) __node_distance(a, b)
|
|
|
|
extern void __init dump_numa_cpu_topology(void);
|
|
|
|
extern int sysfs_add_device_to_node(struct device *dev, int nid);
|
|
extern void sysfs_remove_device_from_node(struct device *dev, int nid);
|
|
|
|
#else
|
|
|
|
static inline void dump_numa_cpu_topology(void) {}
|
|
|
|
static inline int sysfs_add_device_to_node(struct device *dev, int nid)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sysfs_remove_device_from_node(struct device *dev,
|
|
int nid)
|
|
{
|
|
}
|
|
#endif /* CONFIG_NUMA */
|
|
|
|
#if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
|
|
extern int start_topology_update(void);
|
|
extern int stop_topology_update(void);
|
|
#else
|
|
static inline int start_topology_update(void)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int stop_topology_update(void)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
|
|
|
|
#include <asm-generic/topology.h>
|
|
|
|
#ifdef CONFIG_SMP
|
|
#include <asm/cputable.h>
|
|
#define smt_capable() (cpu_has_feature(CPU_FTR_SMT))
|
|
|
|
#ifdef CONFIG_PPC64
|
|
#include <asm/smp.h>
|
|
|
|
#define topology_thread_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
|
|
#define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
|
|
#define topology_core_id(cpu) (cpu_to_core_id(cpu))
|
|
#endif
|
|
#endif
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_POWERPC_TOPOLOGY_H */
|