Release 4.12 include/linux/memory.h
/*
* include/linux/memory.h - generic memory definition
*
* This is mainly for topological representation. We define the
* basic "struct memory_block" here, which can be embedded in per-arch
* definitions or NUMA information.
*
* Basic handling of the devices is done in drivers/base/memory.c
* and system devices are handled in drivers/base/sys.c.
*
* Memory block are exported via sysfs in the class/memory/devices/
* directory.
*
*/
#ifndef _LINUX_MEMORY_H_
#define _LINUX_MEMORY_H_
#include <linux/node.h>
#include <linux/compiler.h>
#include <linux/mutex.h>
#include <linux/notifier.h>
#define MIN_MEMORY_BLOCK_SIZE (1UL << SECTION_SIZE_BITS)
struct memory_block {
unsigned long start_section_nr;
unsigned long end_section_nr;
unsigned long state; /* serialized by the dev->lock */
int section_count; /* serialized by mem_sysfs_mutex */
int online_type; /* for passing data to online routine */
int phys_device; /* to which fru does this belong? */
void *hw; /* optional pointer to fw/hw data */
int (*phys_callback)(struct memory_block *);
struct device dev;
};
int arch_get_memory_phys_device(unsigned long start_pfn);
unsigned long memory_block_size_bytes(void);
/* These states are exposed to userspace as text strings in sysfs */
#define MEM_ONLINE (1<<0)
/* exposed to userspace */
#define MEM_GOING_OFFLINE (1<<1)
/* exposed to userspace */
#define MEM_OFFLINE (1<<2)
/* exposed to userspace */
#define MEM_GOING_ONLINE (1<<3)
#define MEM_CANCEL_ONLINE (1<<4)
#define MEM_CANCEL_OFFLINE (1<<5)
struct memory_notify {
unsigned long start_pfn;
unsigned long nr_pages;
int status_change_nid_normal;
int status_change_nid_high;
int status_change_nid;
};
/*
* During pageblock isolation, count the number of pages within the
* range [start_pfn, start_pfn + nr_pages) which are owned by code
* in the notifier chain.
*/
#define MEM_ISOLATE_COUNT (1<<0)
struct memory_isolate_notify {
unsigned long start_pfn; /* Start of range to check */
unsigned int nr_pages; /* # pages in range to check */
unsigned int pages_found; /* # pages owned found by callbacks */
};
struct notifier_block;
struct mem_section;
/*
* Priorities for the hotplug memory callback routines (stored in decreasing
* order in the callback chain)
*/
#define SLAB_CALLBACK_PRI 1
#define IPC_CALLBACK_PRI 10
#ifndef CONFIG_MEMORY_HOTPLUG_SPARSE
static inline int memory_dev_init(void)
{
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Hansen | 12 | 100.00% | 1 | 100.00% |
| Total | 12 | 100.00% | 1 | 100.00% |
static inline int register_memory_notifier(struct notifier_block *nb)
{
return 0;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Dave Hansen | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
static inline void unregister_memory_notifier(struct notifier_block *nb)
{
}
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| Dave Hansen | 11 | 100.00% | 1 | 100.00% |
| Total | 11 | 100.00% | 1 | 100.00% |
static inline int memory_notify(unsigned long val, void *v)
{
return 0;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Yasunori Goto | 18 | 100.00% | 1 | 100.00% |
| Total | 18 | 100.00% | 1 | 100.00% |
static inline int register_memory_isolate_notifier(struct notifier_block *nb)
{
return 0;
}
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| Robert Jennings | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
static inline void unregister_memory_isolate_notifier(struct notifier_block *nb)
{
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Robert Jennings | 11 | 100.00% | 1 | 100.00% |
| Total | 11 | 100.00% | 1 | 100.00% |
static inline int memory_isolate_notify(unsigned long val, void *v)
{
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Robert Jennings | 18 | 100.00% | 1 | 100.00% |
| Total | 18 | 100.00% | 1 | 100.00% |
#else
extern int register_memory_notifier(struct notifier_block *nb);
extern void unregister_memory_notifier(struct notifier_block *nb);
extern int register_memory_isolate_notifier(struct notifier_block *nb);
extern void unregister_memory_isolate_notifier(struct notifier_block *nb);
extern int register_new_memory(int, struct mem_section *);
#ifdef CONFIG_MEMORY_HOTREMOVE
extern int unregister_memory_section(struct mem_section *);
#endif
extern int memory_dev_init(void);
extern int memory_notify(unsigned long val, void *v);
extern int memory_isolate_notify(unsigned long val, void *v);
extern struct memory_block *find_memory_block_hinted(struct mem_section *,
struct memory_block *);
extern struct memory_block *find_memory_block(struct mem_section *);
#define CONFIG_MEM_BLOCK_SIZE (PAGES_PER_SECTION<<PAGE_SHIFT)
#endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */
#ifdef CONFIG_MEMORY_HOTPLUG
#define hotplug_memory_notifier(fn, pri) ({ \
static __meminitdata struct notifier_block fn##_mem_nb =\
{ .notifier_call = fn, .priority = pri };\
register_memory_notifier(&fn##_mem_nb); \
})
#define register_hotmemory_notifier(nb) register_memory_notifier(nb)
#define unregister_hotmemory_notifier(nb) unregister_memory_notifier(nb)
#else
#define hotplug_memory_notifier(fn, pri) ({ 0; })
/* These aren't inline functions due to a GCC bug. */
#define register_hotmemory_notifier(nb) ({ (void)(nb); 0; })
#define unregister_hotmemory_notifier(nb) ({ (void)(nb); })
#endif
/*
* Kernel text modification mutex, used for code patching. Users of this lock
* can sleep.
*/
extern struct mutex text_mutex;
#endif /* _LINUX_MEMORY_H_ */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Hansen | 155 | 32.49% | 1 | 4.00% |
| Robert Jennings | 102 | 21.38% | 1 | 4.00% |
| Yasunori Goto | 89 | 18.66% | 2 | 8.00% |
| Andrew Morton | 33 | 6.92% | 1 | 4.00% |
| Robin Holt | 15 | 3.14% | 1 | 4.00% |
| Gary Hade | 13 | 2.73% | 1 | 4.00% |
| Nadia Derbey | 9 | 1.89% | 2 | 8.00% |
| Nathan Fontenot | 8 | 1.68% | 2 | 8.00% |
| Heiko Carstens | 8 | 1.68% | 1 | 4.00% |
| Rashika Kheria | 7 | 1.47% | 1 | 4.00% |
| Lai Jiangshan | 6 | 1.26% | 2 | 8.00% |
| Mathieu Desnoyers | 6 | 1.26% | 1 | 4.00% |
| Tim Schmielau | 6 | 1.26% | 1 | 4.00% |
| Seth Jennings | 5 | 1.05% | 1 | 4.00% |
| David Rientjes | 5 | 1.05% | 1 | 4.00% |
| Benjamin Herrenschmidt | 3 | 0.63% | 1 | 4.00% |
| Keith Mannthey | 2 | 0.42% | 1 | 4.00% |
| Kay Sievers | 2 | 0.42% | 1 | 4.00% |
| Vincent Stehlé | 1 | 0.21% | 1 | 4.00% |
| Daniel Walker | 1 | 0.21% | 1 | 4.00% |
| Jianguo Wu | 1 | 0.21% | 1 | 4.00% |
| Total | 477 | 100.00% | 25 | 100.00% |
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