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mm/migrate: move migration helper from .h to .c 

It's not performance sensitive function.  Move it to .c.  This is a
preparation step for future change.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Mike Kravetz <mike.kravetz@oracle.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Roman Gushchin <guro@fb.com>
Link: http://lkml.kernel.org/r/1594622517-20681-3-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joonsoo Kim 2020-08-11 18:37:14 -07:00 committed by Linus Torvalds
parent c7073bab57
commit b4b382238e
2 changed files with 34 additions and 28 deletions
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33
include/linux/migrate.h
View File

@ -31,34 +31,6 @@ enum migrate_reason {
/* In mm/debug.c; also keep sync with include/trace/events/migrate.h */
extern const char *migrate_reason_names[MR_TYPES];
static inline struct page *new_page_nodemask(struct page *page,
int preferred_nid, nodemask_t *nodemask)
{
gfp_t gfp_mask = GFP_USER | __GFP_MOVABLE | __GFP_RETRY_MAYFAIL;
unsigned int order = 0;
struct page *new_page = NULL;
if (PageHuge(page))
return alloc_huge_page_nodemask(page_hstate(compound_head(page)),
preferred_nid, nodemask);
if (PageTransHuge(page)) {
gfp_mask |= GFP_TRANSHUGE;
order = HPAGE_PMD_ORDER;
}
if (PageHighMem(page) || (zone_idx(page_zone(page)) == ZONE_MOVABLE))
gfp_mask |= __GFP_HIGHMEM;
new_page = __alloc_pages_nodemask(gfp_mask, order,
preferred_nid, nodemask);
if (new_page && PageTransHuge(new_page))
prep_transhuge_page(new_page);
return new_page;
}
#ifdef CONFIG_MIGRATION
extern void putback_movable_pages(struct list_head *l);
@ -67,6 +39,8 @@ extern int migrate_page(struct address_space *mapping,
enum migrate_mode mode);
extern int migrate_pages(struct list_head *l, new_page_t new, free_page_t free,
unsigned long private, enum migrate_mode mode, int reason);
extern struct page *new_page_nodemask(struct page *page,
int preferred_nid, nodemask_t *nodemask);
extern int isolate_movable_page(struct page *page, isolate_mode_t mode);
extern void putback_movable_page(struct page *page);
@ -85,6 +59,9 @@ static inline int migrate_pages(struct list_head *l, new_page_t new,
free_page_t free, unsigned long private, enum migrate_mode mode,
int reason)
{ return -ENOSYS; }
static inline struct page *new_page_nodemask(struct page *page,
int preferred_nid, nodemask_t *nodemask)
{ return NULL; }
static inline int isolate_movable_page(struct page *page, isolate_mode_t mode)
{ return -EBUSY; }

29
mm/migrate.c
View File

@ -1538,6 +1538,35 @@ out:
return rc;
}
struct page *new_page_nodemask(struct page *page,
int preferred_nid, nodemask_t *nodemask)
{
gfp_t gfp_mask = GFP_USER | __GFP_MOVABLE | __GFP_RETRY_MAYFAIL;
unsigned int order = 0;
struct page *new_page = NULL;
if (PageHuge(page))
return alloc_huge_page_nodemask(
page_hstate(compound_head(page)),
preferred_nid, nodemask);
if (PageTransHuge(page)) {
gfp_mask |= GFP_TRANSHUGE;
order = HPAGE_PMD_ORDER;
}
if (PageHighMem(page) || (zone_idx(page_zone(page)) == ZONE_MOVABLE))
gfp_mask |= __GFP_HIGHMEM;
new_page = __alloc_pages_nodemask(gfp_mask, order,
preferred_nid, nodemask);
if (new_page && PageTransHuge(new_page))
prep_transhuge_page(new_page);
return new_page;
}
#ifdef CONFIG_NUMA
static int store_status(int __user *status, int start, int value, int nr)