diff options
| author | Joonsoo Kim <js1304@gmail.com> | 2016-01-15 00:18:39 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-01-15 01:00:49 +0100 |
| commit | fea85cff11de4377040deff0e85eb2793fb078aa (patch) | |
| tree | a1daea7d7c44d4d11ff139be637c565621944432 /mm/page_isolation.c | |
| parent | mm/mempolicy.c: convert the shared_policy lock to a rwlock (diff) | |
| download | linux-fea85cff11de4377040deff0e85eb2793fb078aa.tar.xz linux-fea85cff11de4377040deff0e85eb2793fb078aa.zip | |
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@lge.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Cc: Minchan Kim <minchan@kernel.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_isolation.c')
| -rw-r--r-- | mm/page_isolation.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/mm/page_isolation.c b/mm/page_isolation.c index 4568fd58f70a..029a171d35dc 100644 --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@ -212,7 +212,7 @@ int undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, * * 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(unsigned long pfn, unsigned long end_pfn, 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 start_pfn, unsigned long end_pfn, 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 start_pfn, unsigned long end_pfn, /* 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, |