From: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> Subject: mm/mempolicy: use a standard migration target allocation callback There is a well-defined migration target allocation callback. Use it. Link: http://lkml.kernel.org/r/1594622517-20681-7-git-send-email-iamjoonsoo.kim@xxxxxxx Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> Acked-by: Michal Hocko <mhocko@xxxxxxxx> Acked-by: Vlastimil Babka <vbabka@xxxxxxx> Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx> Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx> Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx> Cc: Roman Gushchin <guro@xxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/internal.h | 1 - mm/mempolicy.c | 31 ++++++------------------------- mm/migrate.c | 8 ++++++-- 3 files changed, 12 insertions(+), 28 deletions(-) --- a/mm/internal.h~mm-mempolicy-use-a-standard-migration-target-allocation-callback +++ a/mm/internal.h @@ -613,7 +613,6 @@ static inline bool is_migrate_highatomic } void setup_zone_pageset(struct zone *zone); -extern struct page *alloc_new_node_page(struct page *page, unsigned long node); struct migration_target_control { int nid; /* preferred node id */ --- a/mm/mempolicy.c~mm-mempolicy-use-a-standard-migration-target-allocation-callback +++ a/mm/mempolicy.c @@ -1065,29 +1065,6 @@ static int migrate_page_add(struct page return 0; } -/* page allocation callback for NUMA node migration */ -struct page *alloc_new_node_page(struct page *page, unsigned long node) -{ - if (PageHuge(page)) { - struct hstate *h = page_hstate(compound_head(page)); - gfp_t gfp_mask = htlb_alloc_mask(h) | __GFP_THISNODE; - - return alloc_huge_page_nodemask(h, node, NULL, gfp_mask); - } else if (PageTransHuge(page)) { - struct page *thp; - - thp = alloc_pages_node(node, - (GFP_TRANSHUGE | __GFP_THISNODE), - HPAGE_PMD_ORDER); - if (!thp) - return NULL; - prep_transhuge_page(thp); - return thp; - } else - return __alloc_pages_node(node, GFP_HIGHUSER_MOVABLE | - __GFP_THISNODE, 0); -} - /* * Migrate pages from one node to a target node. * Returns error or the number of pages not migrated. @@ -1098,6 +1075,10 @@ static int migrate_to_node(struct mm_str nodemask_t nmask; LIST_HEAD(pagelist); int err = 0; + struct migration_target_control mtc = { + .nid = dest, + .gfp_mask = GFP_HIGHUSER_MOVABLE | __GFP_THISNODE, + }; nodes_clear(nmask); node_set(source, nmask); @@ -1112,8 +1093,8 @@ static int migrate_to_node(struct mm_str flags | MPOL_MF_DISCONTIG_OK, &pagelist); if (!list_empty(&pagelist)) { - err = migrate_pages(&pagelist, alloc_new_node_page, NULL, dest, - MIGRATE_SYNC, MR_SYSCALL); + err = migrate_pages(&pagelist, alloc_migration_target, NULL, + (unsigned long)&mtc, MIGRATE_SYNC, MR_SYSCALL); if (err) putback_movable_pages(&pagelist); } --- a/mm/migrate.c~mm-mempolicy-use-a-standard-migration-target-allocation-callback +++ a/mm/migrate.c @@ -1598,9 +1598,13 @@ static int do_move_pages_to_node(struct struct list_head *pagelist, int node) { int err; + struct migration_target_control mtc = { + .nid = node, + .gfp_mask = GFP_HIGHUSER_MOVABLE | __GFP_THISNODE, + }; - err = migrate_pages(pagelist, alloc_new_node_page, NULL, node, - MIGRATE_SYNC, MR_SYSCALL); + err = migrate_pages(pagelist, alloc_migration_target, NULL, + (unsigned long)&mtc, MIGRATE_SYNC, MR_SYSCALL); if (err) putback_movable_pages(pagelist); return err; _
