{
#ifdef CONFIG_SPARSEMEM
pfn &= (PAGES_PER_SECTION-1);
- return (pfn >> pageblock_order) * NR_PAGEBLOCK_BITS;
#else
pfn = pfn - round_down(page_zone(page)->zone_start_pfn, pageblock_nr_pages);
- return (pfn >> pageblock_order) * NR_PAGEBLOCK_BITS;
#endif /* CONFIG_SPARSEMEM */
+ return (pfn >> pageblock_order) * NR_PAGEBLOCK_BITS;
}
/**
* get_pfnblock_flags_mask - Return the requested group of flags for the pageblock_nr_pages block of pages
* @page: The page within the block of interest
* @pfn: The target page frame number
- * @end_bitidx: The last bit of interest to retrieve
* @mask: mask of bits that the caller is interested in
*
* Return: pageblock_bits flags
*/
-static __always_inline unsigned long __get_pfnblock_flags_mask(struct page *page,
+static __always_inline
+unsigned long __get_pfnblock_flags_mask(struct page *page,
unsigned long pfn,
- unsigned long end_bitidx,
unsigned long mask)
{
unsigned long *bitmap;
bitidx &= (BITS_PER_LONG-1);
word = bitmap[word_bitidx];
- bitidx += end_bitidx;
- return (word >> (BITS_PER_LONG - bitidx - 1)) & mask;
+ return (word >> bitidx) & mask;
}
unsigned long get_pfnblock_flags_mask(struct page *page, unsigned long pfn,
- unsigned long end_bitidx,
unsigned long mask)
{
- return __get_pfnblock_flags_mask(page, pfn, end_bitidx, mask);
+ return __get_pfnblock_flags_mask(page, pfn, mask);
}
static __always_inline int get_pfnblock_migratetype(struct page *page, unsigned long pfn)
{
- return __get_pfnblock_flags_mask(page, pfn, PB_migrate_end, MIGRATETYPE_MASK);
+ return __get_pfnblock_flags_mask(page, pfn, MIGRATETYPE_MASK);
}
/**
* @page: The page within the block of interest
* @flags: The flags to set
* @pfn: The target page frame number
- * @end_bitidx: The last bit of interest
* @mask: mask of bits that the caller is interested in
*/
void set_pfnblock_flags_mask(struct page *page, unsigned long flags,
unsigned long pfn,
- unsigned long end_bitidx,
unsigned long mask)
{
unsigned long *bitmap;
VM_BUG_ON_PAGE(!zone_spans_pfn(page_zone(page), pfn), page);
- bitidx += end_bitidx;
- mask <<= (BITS_PER_LONG - bitidx - 1);
- flags <<= (BITS_PER_LONG - bitidx - 1);
+ mask <<= bitidx;
+ flags <<= bitidx;
word = READ_ONCE(bitmap[word_bitidx]);
for (;;) {
migratetype < MIGRATE_PCPTYPES))
migratetype = MIGRATE_UNMOVABLE;
- set_pageblock_flags_group(page, (unsigned long)migratetype,
- PB_migrate, PB_migrate_end);
+ set_pfnblock_flags_mask(page, (unsigned long)migratetype,
+ page_to_pfn(page), MIGRATETYPE_MASK);
}
#ifdef CONFIG_DEBUG_VM
{
int i;
+ /* s390's use of memset() could override KASAN redzones. */
+ kasan_disable_current();
for (i = 0; i < numpages; i++)
clear_highpage(page + i);
+ kasan_enable_current();
}
static __always_inline bool free_pages_prepare(struct page *page,
* This array describes the order lists are fallen back to when
* the free lists for the desirable migrate type are depleted
*/
-static int fallbacks[MIGRATE_TYPES][4] = {
+static int fallbacks[MIGRATE_TYPES][3] = {
[MIGRATE_UNMOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_MOVABLE, MIGRATE_TYPES },
[MIGRATE_MOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_UNMOVABLE, MIGRATE_TYPES },
[MIGRATE_RECLAIMABLE] = { MIGRATE_UNMOVABLE, MIGRATE_MOVABLE, MIGRATE_TYPES },
* allocating from CMA when over half of the zone's free memory
* is in the CMA area.
*/
- if (migratetype == MIGRATE_MOVABLE &&
+ if (alloc_flags & ALLOC_CMA &&
zone_page_state(zone, NR_FREE_CMA_PAGES) >
zone_page_state(zone, NR_FREE_PAGES) / 2) {
page = __rmqueue_cma_fallback(zone, order);
retry:
page = __rmqueue_smallest(zone, order, migratetype);
if (unlikely(!page)) {
- if (migratetype == MIGRATE_MOVABLE)
+ if (alloc_flags & ALLOC_CMA)
page = __rmqueue_cma_fallback(zone, order);
if (!page && __rmqueue_fallback(zone, order, migratetype,
return alloc_flags;
}
+static inline unsigned int current_alloc_flags(gfp_t gfp_mask,
+ unsigned int alloc_flags)
+{
+#ifdef CONFIG_CMA
+ unsigned int pflags = current->flags;
+
+ if (!(pflags & PF_MEMALLOC_NOCMA) &&
+ gfp_migratetype(gfp_mask) == MIGRATE_MOVABLE)
+ alloc_flags |= ALLOC_CMA;
+
+#endif
+ return alloc_flags;
+}
+
/*
* get_page_from_freelist goes through the zonelist trying to allocate
* a page.
} else if (unlikely(rt_task(current)) && !in_interrupt())
alloc_flags |= ALLOC_HARDER;
-#ifdef CONFIG_CMA
- if (gfp_migratetype(gfp_mask) == MIGRATE_MOVABLE)
- alloc_flags |= ALLOC_CMA;
-#endif
+ alloc_flags = current_alloc_flags(gfp_mask, alloc_flags);
+
return alloc_flags;
}
reserve_flags = __gfp_pfmemalloc_flags(gfp_mask);
if (reserve_flags)
- alloc_flags = reserve_flags;
+ alloc_flags = current_alloc_flags(gfp_mask, reserve_flags);
/*
* Reset the nodemask and zonelist iterators if memory policies can be
/* Avoid allocations with no watermarks from looping endlessly */
if (tsk_is_oom_victim(current) &&
- (alloc_flags == ALLOC_OOM ||
+ (alloc_flags & ALLOC_OOM ||
(gfp_mask & __GFP_NOMEMALLOC)))
goto nopage;
if (cpusets_enabled()) {
*alloc_mask |= __GFP_HARDWALL;
- if (!ac->nodemask)
+ /*
+ * When we are in the interrupt context, it is irrelevant
+ * to the current task context. It means that any node ok.
+ */
+ if (!in_interrupt() && !ac->nodemask)
ac->nodemask = &cpuset_current_mems_allowed;
else
*alloc_flags |= ALLOC_CPUSET;
if (should_fail_alloc_page(gfp_mask, order))
return false;
- if (IS_ENABLED(CONFIG_CMA) && ac->migratetype == MIGRATE_MOVABLE)
- *alloc_flags |= ALLOC_CMA;
+ *alloc_flags = current_alloc_flags(gfp_mask, *alloc_flags);
return true;
}
}
EXPORT_SYMBOL_GPL(nr_free_buffer_pages);
-/**
- * nr_free_pagecache_pages - count number of pages beyond high watermark
- *
- * nr_free_pagecache_pages() counts the number of pages which are beyond the
- * high watermark within all zones.
- *
- * Return: number of pages beyond high watermark within all zones.
- */
-unsigned long nr_free_pagecache_pages(void)
-{
- return nr_free_zone_pages(gfp_zone(GFP_HIGHUSER_MOVABLE));
-}
-
static inline void show_node(struct zone *zone)
{
if (IS_ENABLED(CONFIG_NUMA))
__build_all_zonelists(pgdat);
/* cpuset refresh routine should be here */
}
- vm_total_pages = nr_free_pagecache_pages();
+ /* Get the number of free pages beyond high watermark in all zones. */
+ vm_total_pages = nr_free_zone_pages(gfp_zone(GFP_HIGHUSER_MOVABLE));
/*
* Disable grouping by mobility if the number of pages in the
* system is too low to allow the mechanism to work. It would be
projects / linux-2.6-microblaze.git / blobdiff