The patch titled
Subject: mm/page_isolation.c: return last tested pfn rather than failure indicator
has been added to the -mm tree. Its filename is
mm-page_isolation-return-last-tested-pfn-rather-than-failure-indicator.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-page_isolation-return-last-tested-pfn-rather-than-failure-indicator.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-page_isolation-return-last-tested-pfn-rather-than-failure-indicator.patch
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------------------------------------------------------
From: Joonsoo Kim <js1304@xxxxxxxxx>
Subject: mm/page_isolation.c: return last tested pfn rather than failure indicator
This is preparation step to report test failed pfn in new tracepoint to
analyze cma allocation failure problem. There is no functional change in
this patch.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Acked-by: Michal Nazarewicz <mina86@xxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_isolation.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff -puN mm/page_isolation.c~mm-page_isolation-return-last-tested-pfn-rather-than-failure-indicator mm/page_isolation.c
--- a/mm/page_isolation.c~mm-page_isolation-return-last-tested-pfn-rather-than-failure-indicator
+++ a/mm/page_isolation.c
@@ -212,7 +212,7 @@ int undo_isolate_page_range(unsigned lon
*
* Returns 1 if all pages in the range are isolated.
*/
-static int
+static unsigned long
__test_page_isolated_in_pageblock(unsigned long pfn, unsigned long end_pfn,
bool skip_hwpoisoned_pages)
{
@@ -237,9 +237,8 @@ __test_page_isolated_in_pageblock(unsign
else
break;
}
- if (pfn < end_pfn)
- return 0;
- return 1;
+
+ return pfn;
}
int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
@@ -248,7 +247,6 @@ int test_pages_isolated(unsigned long st
unsigned long pfn, flags;
struct page *page;
struct zone *zone;
- int ret;
/*
* Note: pageblock_nr_pages != MAX_ORDER. Then, chunks of free pages
@@ -266,10 +264,11 @@ int test_pages_isolated(unsigned long st
/* Check all pages are free or marked as ISOLATED */
zone = page_zone(page);
spin_lock_irqsave(&zone->lock, flags);
- ret = __test_page_isolated_in_pageblock(start_pfn, end_pfn,
+ pfn = __test_page_isolated_in_pageblock(start_pfn, end_pfn,
skip_hwpoisoned_pages);
spin_unlock_irqrestore(&zone->lock, flags);
- return ret ? 0 : -EBUSY;
+
+ return pfn < end_pfn ? -EBUSY : 0;
}
struct page *alloc_migrate_target(struct page *page, unsigned long private,
_
Patches currently in -mm which might be from js1304@xxxxxxxxx are
mm-page_isolation-return-last-tested-pfn-rather-than-failure-indicator.patch
mm-page_isolation-add-new-tracepoint-test_pages_isolated.patch
mm-cma-always-check-which-page-cause-allocation-failure.patch
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