The patch titled
Subject: mm/mempolicy: use a standard migration target allocation callback
has been added to the -mm tree. Its filename is
mm-mempolicy-use-a-standard-migration-target-allocation-callback.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-mempolicy-use-a-standard-migration-target-allocation-callback.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-mempolicy-use-a-standard-migration-target-allocation-callback.patch
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The -mm tree is included into linux-next and is updated
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------------------------------------------------------
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
@@ -1594,9 +1594,13 @@ 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;
_
Patches currently in -mm which might be from iamjoonsoo.kim@xxxxxxx are
mm-page_isolation-prefer-the-node-of-the-source-page.patch
mm-migrate-move-migration-helper-from-h-to-c.patch
mm-hugetlb-unify-migration-callbacks.patch
mm-migrate-clear-__gfp_reclaim-to-make-the-migration-callback-consistent-with-regular-thp-allocations.patch
mm-migrate-make-a-standard-migration-target-allocation-function.patch
mm-mempolicy-use-a-standard-migration-target-allocation-callback.patch
mm-page_alloc-remove-a-wrapper-for-alloc_migration_target.patch
mm-memory-failure-remove-a-wrapper-for-alloc_migration_target.patch
mm-memory_hotplug-remove-a-wrapper-for-alloc_migration_target.patch
