Contributors: 43
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Dave Hansen |
414 |
29.89% |
4 |
3.64% |
| David Hildenbrand |
160 |
11.55% |
26 |
23.64% |
| Michal Hocko |
96 |
6.93% |
10 |
9.09% |
| Kefeng Wang |
72 |
5.20% |
1 |
0.91% |
| Pavel Tatashin |
43 |
3.10% |
2 |
1.82% |
| Tang Chen |
43 |
3.10% |
3 |
2.73% |
| Wen Congyang |
40 |
2.89% |
3 |
2.73% |
| Oscar Salvador |
35 |
2.53% |
3 |
2.73% |
| Motohiro Kosaki |
35 |
2.53% |
1 |
0.91% |
| Christoph Hellwig |
33 |
2.38% |
3 |
2.73% |
| Badari Pulavarty |
33 |
2.38% |
2 |
1.82% |
| Daniel Kiper |
32 |
2.31% |
1 |
0.91% |
| Kamezawa Hiroyuki |
30 |
2.17% |
3 |
2.73% |
| David Rientjes |
27 |
1.95% |
2 |
1.82% |
| Yasunori Goto |
27 |
1.95% |
2 |
1.82% |
| Andrew Morton |
25 |
1.81% |
5 |
4.55% |
| Dan J Williams |
24 |
1.73% |
7 |
6.36% |
| Andi Kleen |
23 |
1.66% |
1 |
0.91% |
| Anshuman Khandual |
22 |
1.59% |
2 |
1.82% |
| Gregory Price |
16 |
1.16% |
2 |
1.82% |
| David Vrabel |
16 |
1.16% |
1 |
0.91% |
| Logan Gunthorpe |
16 |
1.16% |
2 |
1.82% |
| Toshi Kani |
15 |
1.08% |
1 |
0.91% |
| Joao Martins |
13 |
0.94% |
1 |
0.91% |
| Keith Mannthey |
12 |
0.87% |
1 |
0.91% |
| Rafael J. Wysocki |
12 |
0.87% |
1 |
0.91% |
| Lai Jiangshan |
9 |
0.65% |
1 |
0.91% |
| Arun K S |
8 |
0.58% |
1 |
0.91% |
| Vishal Verma |
7 |
0.51% |
1 |
0.91% |
| Vladimir Davydov |
6 |
0.43% |
1 |
0.91% |
| Akinobu Mita |
5 |
0.36% |
1 |
0.91% |
| Aneesh Kumar K.V |
4 |
0.29% |
2 |
1.82% |
| Juergen Gross |
4 |
0.29% |
1 |
0.91% |
| Anton Blanchard |
4 |
0.29% |
2 |
1.82% |
| Reza Arbab |
4 |
0.29% |
1 |
0.91% |
| Zi Yan |
3 |
0.22% |
1 |
0.91% |
| Jens Axboe |
3 |
0.22% |
1 |
0.91% |
| Linus Torvalds (pre-git) |
3 |
0.22% |
2 |
1.82% |
| Yasuaki Ishimatsu |
3 |
0.22% |
1 |
0.91% |
| Paul Gortmaker |
3 |
0.22% |
1 |
0.91% |
| Yaowei Bai |
2 |
0.14% |
1 |
0.91% |
| Wei Yang |
2 |
0.14% |
1 |
0.91% |
| Greg Kroah-Hartman |
1 |
0.07% |
1 |
0.91% |
| Total |
1385 |
|
110 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_MEMORY_HOTPLUG_H
#define __LINUX_MEMORY_HOTPLUG_H
#include <linux/mmzone.h>
#include <linux/spinlock.h>
#include <linux/notifier.h>
#include <linux/bug.h>
struct page;
struct zone;
struct pglist_data;
struct mem_section;
struct memory_group;
struct resource;
struct vmem_altmap;
struct dev_pagemap;
/* Types for control the zone type of onlined and offlined memory */
enum mmop {
/* Offline the memory. */
MMOP_OFFLINE = 0,
/* Online the memory. Zone depends, see default_zone_for_pfn(). */
MMOP_ONLINE,
/* Online the memory to ZONE_NORMAL. */
MMOP_ONLINE_KERNEL,
/* Online the memory to ZONE_MOVABLE. */
MMOP_ONLINE_MOVABLE,
};
#ifdef CONFIG_MEMORY_HOTPLUG
struct page *pfn_to_online_page(unsigned long pfn);
/* Flags for add_memory() and friends to specify memory hotplug details. */
typedef int __bitwise mhp_t;
/* No special request */
#define MHP_NONE ((__force mhp_t)0)
/*
* Allow merging of the added System RAM resource with adjacent,
* mergeable resources. After a successful call to add_memory_resource()
* with this flag set, the resource pointer must no longer be used as it
* might be stale, or the resource might have changed.
*/
#define MHP_MERGE_RESOURCE ((__force mhp_t)BIT(0))
/*
* We want memmap (struct page array) to be self contained.
* To do so, we will use the beginning of the hot-added range to build
* the page tables for the memmap array that describes the entire range.
* Only selected architectures support it with SPARSE_VMEMMAP.
* This is only a hint, the core kernel can decide to not do this based on
* different alignment checks.
*/
#define MHP_MEMMAP_ON_MEMORY ((__force mhp_t)BIT(1))
/*
* The nid field specifies a memory group id (mgid) instead. The memory group
* implies the node id (nid).
*/
#define MHP_NID_IS_MGID ((__force mhp_t)BIT(2))
/*
* Extended parameters for memory hotplug:
* altmap: alternative allocator for memmap array (optional)
* pgprot: page protection flags to apply to newly created page tables
* (required)
*/
struct mhp_params {
struct vmem_altmap *altmap;
pgprot_t pgprot;
struct dev_pagemap *pgmap;
};
bool mhp_range_allowed(u64 start, u64 size, bool need_mapping);
struct range mhp_get_pluggable_range(bool need_mapping);
bool mhp_supports_memmap_on_memory(void);
/*
* Zone resizing functions
*
* Note: any attempt to resize a zone should has pgdat_resize_lock()
* zone_span_writelock() both held. This ensure the size of a zone
* can't be changed while pgdat_resize_lock() held.
*/
static inline unsigned zone_span_seqbegin(struct zone *zone)
{
return read_seqbegin(&zone->span_seqlock);
}
static inline int zone_span_seqretry(struct zone *zone, unsigned iv)
{
return read_seqretry(&zone->span_seqlock, iv);
}
static inline void zone_span_writelock(struct zone *zone)
{
write_seqlock(&zone->span_seqlock);
}
static inline void zone_span_writeunlock(struct zone *zone)
{
write_sequnlock(&zone->span_seqlock);
}
static inline void zone_seqlock_init(struct zone *zone)
{
seqlock_init(&zone->span_seqlock);
}
extern void adjust_present_page_count(struct page *page,
struct memory_group *group,
long nr_pages);
/* VM interface that may be used by firmware interface */
extern int mhp_init_memmap_on_memory(unsigned long pfn, unsigned long nr_pages,
struct zone *zone);
extern void mhp_deinit_memmap_on_memory(unsigned long pfn, unsigned long nr_pages);
extern int online_pages(unsigned long pfn, unsigned long nr_pages,
struct zone *zone, struct memory_group *group);
extern unsigned long __offline_isolated_pages(unsigned long start_pfn,
unsigned long end_pfn);
typedef void (*online_page_callback_t)(struct page *page, unsigned int order);
extern void generic_online_page(struct page *page, unsigned int order);
extern int set_online_page_callback(online_page_callback_t callback);
extern int restore_online_page_callback(online_page_callback_t callback);
extern int try_online_node(int nid);
extern int arch_add_memory(int nid, u64 start, u64 size,
struct mhp_params *params);
extern u64 max_mem_size;
extern int mhp_online_type_from_str(const char *str);
/* If movable_node boot option specified */
extern bool movable_node_enabled;
static inline bool movable_node_is_enabled(void)
{
return movable_node_enabled;
}
extern void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap);
extern void __remove_pages(unsigned long start_pfn, unsigned long nr_pages,
struct vmem_altmap *altmap);
/* reasonably generic interface to expand the physical pages */
extern int __add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages,
struct mhp_params *params);
#ifndef CONFIG_ARCH_HAS_ADD_PAGES
static inline int add_pages(int nid, unsigned long start_pfn,
unsigned long nr_pages, struct mhp_params *params)
{
return __add_pages(nid, start_pfn, nr_pages, params);
}
#else /* ARCH_HAS_ADD_PAGES */
int add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages,
struct mhp_params *params);
#endif /* ARCH_HAS_ADD_PAGES */
void get_online_mems(void);
void put_online_mems(void);
void mem_hotplug_begin(void);
void mem_hotplug_done(void);
/* See kswapd_is_running() */
static inline void pgdat_kswapd_lock(pg_data_t *pgdat)
{
mutex_lock(&pgdat->kswapd_lock);
}
static inline void pgdat_kswapd_unlock(pg_data_t *pgdat)
{
mutex_unlock(&pgdat->kswapd_lock);
}
static inline void pgdat_kswapd_lock_init(pg_data_t *pgdat)
{
mutex_init(&pgdat->kswapd_lock);
}
#else /* ! CONFIG_MEMORY_HOTPLUG */
#define pfn_to_online_page(pfn) \
({ \
struct page *___page = NULL; \
if (pfn_valid(pfn)) \
___page = pfn_to_page(pfn); \
___page; \
})
static inline unsigned zone_span_seqbegin(struct zone *zone)
{
return 0;
}
static inline int zone_span_seqretry(struct zone *zone, unsigned iv)
{
return 0;
}
static inline void zone_span_writelock(struct zone *zone) {}
static inline void zone_span_writeunlock(struct zone *zone) {}
static inline void zone_seqlock_init(struct zone *zone) {}
static inline int try_online_node(int nid)
{
return 0;
}
static inline void get_online_mems(void) {}
static inline void put_online_mems(void) {}
static inline void mem_hotplug_begin(void) {}
static inline void mem_hotplug_done(void) {}
static inline bool movable_node_is_enabled(void)
{
return false;
}
static inline bool mhp_supports_memmap_on_memory(void)
{
return false;
}
static inline void pgdat_kswapd_lock(pg_data_t *pgdat) {}
static inline void pgdat_kswapd_unlock(pg_data_t *pgdat) {}
static inline void pgdat_kswapd_lock_init(pg_data_t *pgdat) {}
#endif /* ! CONFIG_MEMORY_HOTPLUG */
/*
* Keep this declaration outside CONFIG_MEMORY_HOTPLUG as some
* platforms might override and use arch_get_mappable_range()
* for internal non memory hotplug purposes.
*/
struct range arch_get_mappable_range(void);
#if defined(CONFIG_MEMORY_HOTPLUG) || defined(CONFIG_DEFERRED_STRUCT_PAGE_INIT)
/*
* pgdat resizing functions
*/
static inline
void pgdat_resize_lock(struct pglist_data *pgdat, unsigned long *flags)
{
spin_lock_irqsave(&pgdat->node_size_lock, *flags);
}
static inline
void pgdat_resize_unlock(struct pglist_data *pgdat, unsigned long *flags)
{
spin_unlock_irqrestore(&pgdat->node_size_lock, *flags);
}
static inline
void pgdat_resize_init(struct pglist_data *pgdat)
{
spin_lock_init(&pgdat->node_size_lock);
}
#else /* !(CONFIG_MEMORY_HOTPLUG || CONFIG_DEFERRED_STRUCT_PAGE_INIT) */
/*
* Stub functions for when hotplug is off
*/
static inline void pgdat_resize_lock(struct pglist_data *p, unsigned long *f) {}
static inline void pgdat_resize_unlock(struct pglist_data *p, unsigned long *f) {}
static inline void pgdat_resize_init(struct pglist_data *pgdat) {}
#endif /* !(CONFIG_MEMORY_HOTPLUG || CONFIG_DEFERRED_STRUCT_PAGE_INIT) */
#ifdef CONFIG_MEMORY_HOTREMOVE
extern void try_offline_node(int nid);
extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages,
struct zone *zone, struct memory_group *group);
extern int remove_memory(u64 start, u64 size);
extern void __remove_memory(u64 start, u64 size);
extern int offline_and_remove_memory(u64 start, u64 size);
#else
static inline void try_offline_node(int nid) {}
static inline int offline_pages(unsigned long start_pfn, unsigned long nr_pages,
struct zone *zone, struct memory_group *group)
{
return -EINVAL;
}
static inline int remove_memory(u64 start, u64 size)
{
return -EBUSY;
}
static inline void __remove_memory(u64 start, u64 size) {}
#endif /* CONFIG_MEMORY_HOTREMOVE */
#ifdef CONFIG_MEMORY_HOTPLUG
/* Default online_type (MMOP_*) when new memory blocks are added. */
extern enum mmop mhp_get_default_online_type(void);
extern void mhp_set_default_online_type(enum mmop online_type);
extern void __ref free_area_init_core_hotplug(struct pglist_data *pgdat);
extern int __add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
extern int add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
extern int add_memory_resource(int nid, struct resource *resource,
mhp_t mhp_flags);
extern int add_memory_driver_managed(int nid, u64 start, u64 size,
const char *resource_name,
mhp_t mhp_flags);
extern void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
unsigned long nr_pages,
struct vmem_altmap *altmap, int migratetype,
bool isolate_pageblock);
extern void remove_pfn_range_from_zone(struct zone *zone,
unsigned long start_pfn,
unsigned long nr_pages);
extern int sparse_add_section(int nid, unsigned long pfn,
unsigned long nr_pages, struct vmem_altmap *altmap,
struct dev_pagemap *pgmap);
extern void sparse_remove_section(unsigned long pfn, unsigned long nr_pages,
struct vmem_altmap *altmap);
extern struct zone *zone_for_pfn_range(enum mmop online_type,
int nid, struct memory_group *group, unsigned long start_pfn,
unsigned long nr_pages);
extern int arch_create_linear_mapping(int nid, u64 start, u64 size,
struct mhp_params *params);
void arch_remove_linear_mapping(u64 start, u64 size);
#endif /* CONFIG_MEMORY_HOTPLUG */
#endif /* __LINUX_MEMORY_HOTPLUG_H */