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mm: remove offlining arg to migrate_pages

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No functional change, but the only purpose of the offlining argument to
migrate_pages() etc, was to ensure that __unmap_and_move() could migrate a
KSM page for memory hotremove (which took ksm_thread_mutex) but not for
other callers.  Now all cases are safe, remove the arg.

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Petr Holasek <pholasek@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Izik Eidus <izik.eidus@ravellosystems.com>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hugh Dickins
2013-02-22 16:35:14 -08:00
committed by Linus Torvalds
parent b79bc0a0c7
commit 9c620e2bc5
7 changed files with 29 additions and 46 deletions
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35
mm/migrate.c
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@@ -701,7 +701,7 @@ static int move_to_new_page(struct page *newpage, struct page *page,
}
static int __unmap_and_move(struct page *page, struct page *newpage,
int force, bool offlining, enum migrate_mode mode)
int force, enum migrate_mode mode)
{
int rc = -EAGAIN;
int remap_swapcache = 1;
@@ -847,8 +847,7 @@ out:
* to the newly allocated page in newpage.
*/
static int unmap_and_move(new_page_t get_new_page, unsigned long private,
struct page *page, int force, bool offlining,
enum migrate_mode mode)
struct page *page, int force, enum migrate_mode mode)
{
int rc = 0;
int *result = NULL;
@@ -866,7 +865,7 @@ static int unmap_and_move(new_page_t get_new_page, unsigned long private,
if (unlikely(split_huge_page(page)))
goto out;
rc = __unmap_and_move(page, newpage, force, offlining, mode);
rc = __unmap_and_move(page, newpage, force, mode);
if (unlikely(rc == MIGRATEPAGE_BALLOON_SUCCESS)) {
/*
@@ -926,8 +925,7 @@ out:
*/
static int unmap_and_move_huge_page(new_page_t get_new_page,
unsigned long private, struct page *hpage,
int force, bool offlining,
enum migrate_mode mode)
int force, enum migrate_mode mode)
{
int rc = 0;
int *result = NULL;
@@ -989,9 +987,8 @@ out:
*
* Return: Number of pages not migrated or error code.
*/
int migrate_pages(struct list_head *from,
new_page_t get_new_page, unsigned long private, bool offlining,
enum migrate_mode mode, int reason)
int migrate_pages(struct list_head *from, new_page_t get_new_page,
unsigned long private, enum migrate_mode mode, int reason)
{
int retry = 1;
int nr_failed = 0;
@@ -1012,8 +1009,7 @@ int migrate_pages(struct list_head *from,
cond_resched();
rc = unmap_and_move(get_new_page, private,
page, pass > 2, offlining,
mode);
page, pass > 2, mode);
switch(rc) {
case -ENOMEM:
@@ -1046,15 +1042,13 @@ out:
}
int migrate_huge_page(struct page *hpage, new_page_t get_new_page,
unsigned long private, bool offlining,
enum migrate_mode mode)
unsigned long private, enum migrate_mode mode)
{
int pass, rc;
for (pass = 0; pass < 10; pass++) {
rc = unmap_and_move_huge_page(get_new_page,
private, hpage, pass > 2, offlining,
mode);
rc = unmap_and_move_huge_page(get_new_page, private,
hpage, pass > 2, mode);
switch (rc) {
case -ENOMEM:
goto out;
@@ -1177,8 +1171,7 @@ set_status:
err = 0;
if (!list_empty(&pagelist)) {
err = migrate_pages(&pagelist, new_page_node,
(unsigned long)pm, 0, MIGRATE_SYNC,
MR_SYSCALL);
(unsigned long)pm, MIGRATE_SYNC, MR_SYSCALL);
if (err)
putback_lru_pages(&pagelist);
}
@@ -1613,10 +1606,8 @@ int migrate_misplaced_page(struct page *page, int node)
goto out;
list_add(&page->lru, &migratepages);
nr_remaining = migrate_pages(&migratepages,
alloc_misplaced_dst_page,
node, false, MIGRATE_ASYNC,
MR_NUMA_MISPLACED);
nr_remaining = migrate_pages(&migratepages, alloc_misplaced_dst_page,
node, MIGRATE_ASYNC, MR_NUMA_MISPLACED);
if (nr_remaining) {
putback_lru_pages(&migratepages);
isolated = 0;