mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 23:23:55 +08:00
9bf12df31f
Pull aio changes from Ben LaHaise: "First off, sorry for this pull request being late in the merge window. Al had raised a couple of concerns about 2 items in the series below. I addressed the first issue (the race introduced by Gu's use of mm_populate()), but he has not provided any further details on how he wants to rework the anon_inode.c changes (which were sent out months ago but have yet to be commented on). The bulk of the changes have been sitting in the -next tree for a few months, with all the issues raised being addressed" * git://git.kvack.org/~bcrl/aio-next: (22 commits) aio: rcu_read_lock protection for new rcu_dereference calls aio: fix race in ring buffer page lookup introduced by page migration support aio: fix rcu sparse warnings introduced by ioctx table lookup patch aio: remove unnecessary debugging from aio_free_ring() aio: table lookup: verify ctx pointer staging/lustre: kiocb->ki_left is removed aio: fix error handling and rcu usage in "convert the ioctx list to table lookup v3" aio: be defensive to ensure request batching is non-zero instead of BUG_ON() aio: convert the ioctx list to table lookup v3 aio: double aio_max_nr in calculations aio: Kill ki_dtor aio: Kill ki_users aio: Kill unneeded kiocb members aio: Kill aio_rw_vect_retry() aio: Don't use ctx->tail unnecessarily aio: io_cancel() no longer returns the io_event aio: percpu ioctx refcount aio: percpu reqs_available aio: reqs_active -> reqs_available aio: fix build when migration is disabled ...
125 lines
4.0 KiB
C
125 lines
4.0 KiB
C
#ifndef _LINUX_MIGRATE_H
|
|
#define _LINUX_MIGRATE_H
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/mempolicy.h>
|
|
#include <linux/migrate_mode.h>
|
|
|
|
typedef struct page *new_page_t(struct page *, unsigned long private, int **);
|
|
|
|
/*
|
|
* Return values from addresss_space_operations.migratepage():
|
|
* - negative errno on page migration failure;
|
|
* - zero on page migration success;
|
|
*
|
|
* The balloon page migration introduces this special case where a 'distinct'
|
|
* return code is used to flag a successful page migration to unmap_and_move().
|
|
* This approach is necessary because page migration can race against balloon
|
|
* deflation procedure, and for such case we could introduce a nasty page leak
|
|
* if a successfully migrated balloon page gets released concurrently with
|
|
* migration's unmap_and_move() wrap-up steps.
|
|
*/
|
|
#define MIGRATEPAGE_SUCCESS 0
|
|
#define MIGRATEPAGE_BALLOON_SUCCESS 1 /* special ret code for balloon page
|
|
* sucessful migration case.
|
|
*/
|
|
enum migrate_reason {
|
|
MR_COMPACTION,
|
|
MR_MEMORY_FAILURE,
|
|
MR_MEMORY_HOTPLUG,
|
|
MR_SYSCALL, /* also applies to cpusets */
|
|
MR_MEMPOLICY_MBIND,
|
|
MR_NUMA_MISPLACED,
|
|
MR_CMA
|
|
};
|
|
|
|
#ifdef CONFIG_MIGRATION
|
|
|
|
extern void putback_lru_pages(struct list_head *l);
|
|
extern void putback_movable_pages(struct list_head *l);
|
|
extern int migrate_page(struct address_space *,
|
|
struct page *, struct page *, enum migrate_mode);
|
|
extern int migrate_pages(struct list_head *l, new_page_t x,
|
|
unsigned long private, enum migrate_mode mode, int reason);
|
|
|
|
extern int fail_migrate_page(struct address_space *,
|
|
struct page *, struct page *);
|
|
|
|
extern int migrate_prep(void);
|
|
extern int migrate_prep_local(void);
|
|
extern int migrate_vmas(struct mm_struct *mm,
|
|
const nodemask_t *from, const nodemask_t *to,
|
|
unsigned long flags);
|
|
extern void migrate_page_copy(struct page *newpage, struct page *page);
|
|
extern int migrate_huge_page_move_mapping(struct address_space *mapping,
|
|
struct page *newpage, struct page *page);
|
|
extern int migrate_page_move_mapping(struct address_space *mapping,
|
|
struct page *newpage, struct page *page,
|
|
struct buffer_head *head, enum migrate_mode mode);
|
|
#else
|
|
|
|
static inline void putback_lru_pages(struct list_head *l) {}
|
|
static inline void putback_movable_pages(struct list_head *l) {}
|
|
static inline int migrate_pages(struct list_head *l, new_page_t x,
|
|
unsigned long private, enum migrate_mode mode, int reason)
|
|
{ return -ENOSYS; }
|
|
|
|
static inline int migrate_prep(void) { return -ENOSYS; }
|
|
static inline int migrate_prep_local(void) { return -ENOSYS; }
|
|
|
|
static inline int migrate_vmas(struct mm_struct *mm,
|
|
const nodemask_t *from, const nodemask_t *to,
|
|
unsigned long flags)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline void migrate_page_copy(struct page *newpage,
|
|
struct page *page) {}
|
|
|
|
static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
|
|
struct page *newpage, struct page *page)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/* Possible settings for the migrate_page() method in address_operations */
|
|
#define migrate_page NULL
|
|
#define fail_migrate_page NULL
|
|
|
|
#endif /* CONFIG_MIGRATION */
|
|
|
|
#ifdef CONFIG_NUMA_BALANCING
|
|
extern int migrate_misplaced_page(struct page *page, int node);
|
|
extern int migrate_misplaced_page(struct page *page, int node);
|
|
extern bool migrate_ratelimited(int node);
|
|
#else
|
|
static inline int migrate_misplaced_page(struct page *page, int node)
|
|
{
|
|
return -EAGAIN; /* can't migrate now */
|
|
}
|
|
static inline bool migrate_ratelimited(int node)
|
|
{
|
|
return false;
|
|
}
|
|
#endif /* CONFIG_NUMA_BALANCING */
|
|
|
|
#if defined(CONFIG_NUMA_BALANCING) && defined(CONFIG_TRANSPARENT_HUGEPAGE)
|
|
extern int migrate_misplaced_transhuge_page(struct mm_struct *mm,
|
|
struct vm_area_struct *vma,
|
|
pmd_t *pmd, pmd_t entry,
|
|
unsigned long address,
|
|
struct page *page, int node);
|
|
#else
|
|
static inline int migrate_misplaced_transhuge_page(struct mm_struct *mm,
|
|
struct vm_area_struct *vma,
|
|
pmd_t *pmd, pmd_t entry,
|
|
unsigned long address,
|
|
struct page *page, int node)
|
|
{
|
|
return -EAGAIN;
|
|
}
|
|
#endif /* CONFIG_NUMA_BALANCING && CONFIG_TRANSPARENT_HUGEPAGE*/
|
|
|
|
#endif /* _LINUX_MIGRATE_H */
|