Commit fe4c86c9 authored by David Hildenbrand's avatar David Hildenbrand Committed by Linus Torvalds

mm: remove "count" parameter from has_unmovable_pages()

Now that the memory isolate notifier is gone, the parameter is always 0.
Drop it and cleanup has_unmovable_pages().

Link: http://lkml.kernel.org/r/20191114131911.11783-3-david@redhat.comSigned-off-by: default avatarDavid Hildenbrand <david@redhat.com>
Acked-by: default avatarMichal Hocko <mhocko@suse.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Qian Cai <cai@lca.pw>
Cc: Pingfan Liu <kernelfans@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Wei Yang <richardw.yang@linux.intel.com>
Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Arun KS <arunks@codeaurora.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 3f9903b9
...@@ -33,8 +33,8 @@ static inline bool is_migrate_isolate(int migratetype) ...@@ -33,8 +33,8 @@ static inline bool is_migrate_isolate(int migratetype)
#define MEMORY_OFFLINE 0x1 #define MEMORY_OFFLINE 0x1
#define REPORT_FAILURE 0x2 #define REPORT_FAILURE 0x2
bool has_unmovable_pages(struct zone *zone, struct page *page, int count, bool has_unmovable_pages(struct zone *zone, struct page *page, int migratetype,
int migratetype, int flags); int flags);
void set_pageblock_migratetype(struct page *page, int migratetype); void set_pageblock_migratetype(struct page *page, int migratetype);
int move_freepages_block(struct zone *zone, struct page *page, int move_freepages_block(struct zone *zone, struct page *page,
int migratetype, int *num_movable); int migratetype, int *num_movable);
......
...@@ -1182,7 +1182,7 @@ static bool is_pageblock_removable_nolock(unsigned long pfn) ...@@ -1182,7 +1182,7 @@ static bool is_pageblock_removable_nolock(unsigned long pfn)
if (!zone_spans_pfn(zone, pfn)) if (!zone_spans_pfn(zone, pfn))
return false; return false;
return !has_unmovable_pages(zone, page, 0, MIGRATE_MOVABLE, return !has_unmovable_pages(zone, page, MIGRATE_MOVABLE,
MEMORY_OFFLINE); MEMORY_OFFLINE);
} }
......
...@@ -8180,17 +8180,15 @@ void *__init alloc_large_system_hash(const char *tablename, ...@@ -8180,17 +8180,15 @@ void *__init alloc_large_system_hash(const char *tablename,
/* /*
* This function checks whether pageblock includes unmovable pages or not. * This function checks whether pageblock includes unmovable pages or not.
* If @count is not zero, it is okay to include less @count unmovable pages
* *
* PageLRU check without isolation or lru_lock could race so that * PageLRU check without isolation or lru_lock could race so that
* MIGRATE_MOVABLE block might include unmovable pages. And __PageMovable * MIGRATE_MOVABLE block might include unmovable pages. And __PageMovable
* check without lock_page also may miss some movable non-lru pages at * check without lock_page also may miss some movable non-lru pages at
* race condition. So you can't expect this function should be exact. * race condition. So you can't expect this function should be exact.
*/ */
bool has_unmovable_pages(struct zone *zone, struct page *page, int count, bool has_unmovable_pages(struct zone *zone, struct page *page, int migratetype,
int migratetype, int flags) int flags)
{ {
unsigned long found;
unsigned long iter = 0; unsigned long iter = 0;
unsigned long pfn = page_to_pfn(page); unsigned long pfn = page_to_pfn(page);
const char *reason = "unmovable page"; const char *reason = "unmovable page";
...@@ -8216,13 +8214,11 @@ bool has_unmovable_pages(struct zone *zone, struct page *page, int count, ...@@ -8216,13 +8214,11 @@ bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
goto unmovable; goto unmovable;
} }
for (found = 0; iter < pageblock_nr_pages; iter++) { for (; iter < pageblock_nr_pages; iter++) {
unsigned long check = pfn + iter; if (!pfn_valid_within(pfn + iter))
if (!pfn_valid_within(check))
continue; continue;
page = pfn_to_page(check); page = pfn_to_page(pfn + iter);
if (PageReserved(page)) if (PageReserved(page))
goto unmovable; goto unmovable;
...@@ -8271,11 +8267,9 @@ bool has_unmovable_pages(struct zone *zone, struct page *page, int count, ...@@ -8271,11 +8267,9 @@ bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
if ((flags & MEMORY_OFFLINE) && PageHWPoison(page)) if ((flags & MEMORY_OFFLINE) && PageHWPoison(page))
continue; continue;
if (__PageMovable(page)) if (__PageMovable(page) || PageLRU(page))
continue; continue;
if (!PageLRU(page))
found++;
/* /*
* If there are RECLAIMABLE pages, we need to check * If there are RECLAIMABLE pages, we need to check
* it. But now, memory offline itself doesn't call * it. But now, memory offline itself doesn't call
...@@ -8289,7 +8283,6 @@ bool has_unmovable_pages(struct zone *zone, struct page *page, int count, ...@@ -8289,7 +8283,6 @@ bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
* is set to both of a memory hole page and a _used_ kernel * is set to both of a memory hole page and a _used_ kernel
* page at boot. * page at boot.
*/ */
if (found > count)
goto unmovable; goto unmovable;
} }
return false; return false;
......
...@@ -37,7 +37,7 @@ static int set_migratetype_isolate(struct page *page, int migratetype, int isol_ ...@@ -37,7 +37,7 @@ static int set_migratetype_isolate(struct page *page, int migratetype, int isol_
* FIXME: Now, memory hotplug doesn't call shrink_slab() by itself. * FIXME: Now, memory hotplug doesn't call shrink_slab() by itself.
* We just check MOVABLE pages. * We just check MOVABLE pages.
*/ */
if (!has_unmovable_pages(zone, page, 0, migratetype, isol_flags)) { if (!has_unmovable_pages(zone, page, migratetype, isol_flags)) {
unsigned long nr_pages; unsigned long nr_pages;
int mt = get_pageblock_migratetype(page); int mt = get_pageblock_migratetype(page);
......
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