The patch titled
Subject: mm/mlock.c: use page_zone() instead of page_zone_id()
has been added to the -mm tree. Its filename is
mm-mlock-use-page_zone-instead-of-page_zone_id.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-mlock-use-page_zone-instead-of-page_zone_id.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-mlock-use-page_zone-instead-of-page_zone_id.patch
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------------------------------------------------------
From: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Subject: mm/mlock.c: use page_zone() instead of page_zone_id()
page_zone_id() is a specialized function to compare the zone for the pages
that are within the section range. If the section of the pages are
different, page_zone_id() can be different even if their zone is the same.
This wrong usage doesn't cause any actual problem since
__munlock_pagevec_fill() would be called again with failed index.
However, it's better to use more appropriate function here.
Link: http://lkml.kernel.org/r/1503559211-10259-1-git-send-email-iamjoonsoo.kim@xxxxxxx
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mlock.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff -puN mm/mlock.c~mm-mlock-use-page_zone-instead-of-page_zone_id mm/mlock.c
--- a/mm/mlock.c~mm-mlock-use-page_zone-instead-of-page_zone_id
+++ a/mm/mlock.c
@@ -365,8 +365,8 @@ static void __munlock_pagevec(struct pag
* @start + PAGE_SIZE when no page could be added by the pte walk.
*/
static unsigned long __munlock_pagevec_fill(struct pagevec *pvec,
- struct vm_area_struct *vma, int zoneid, unsigned long start,
- unsigned long end)
+ struct vm_area_struct *vma, struct zone *zone,
+ unsigned long start, unsigned long end)
{
pte_t *pte;
spinlock_t *ptl;
@@ -394,7 +394,7 @@ static unsigned long __munlock_pagevec_f
* Break if page could not be obtained or the page's node+zone does not
* match
*/
- if (!page || page_zone_id(page) != zoneid)
+ if (!page || page_zone(page) != zone)
break;
/*
@@ -446,7 +446,6 @@ void munlock_vma_pages_range(struct vm_a
unsigned long page_increm;
struct pagevec pvec;
struct zone *zone;
- int zoneid;
pagevec_init(&pvec, 0);
/*
@@ -481,7 +480,6 @@ void munlock_vma_pages_range(struct vm_a
*/
pagevec_add(&pvec, page);
zone = page_zone(page);
- zoneid = page_zone_id(page);
/*
* Try to fill the rest of pagevec using fast
@@ -490,7 +488,7 @@ void munlock_vma_pages_range(struct vm_a
* pagevec.
*/
start = __munlock_pagevec_fill(&pvec, vma,
- zoneid, start, end);
+ zone, start, end);
__munlock_pagevec(&pvec, zone);
goto next;
}
_
Patches currently in -mm which might be from iamjoonsoo.kim@xxxxxxx are
mm-mlock-use-page_zone-instead-of-page_zone_id.patch
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