linux-4.4.1/__rmqueue_fallback()
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開始行:
*参照元 [#w4ed7ec6]
#backlinks
*説明 [#af22a5c8]
-パス: [[linux-4.4.1/mm/page_alloc.c]]
-FIXME: これは何？
--説明
**引数 [#pf3dd2ed]
-struct zone *zone
--
--[[linux-4.4.1/zone]]
-unsigned int order
--
-int start_migratetype
--
**返り値 [#n4eb8dc6]
-struct page *
--
--[[linux-4.4.1/page]]
**参考 [#tf983043]
*実装 [#jb379114]
/* Remove an element from the buddy allocator from the f...
static inline struct page *
__rmqueue_fallback(struct zone *zone, unsigned int order...
{
struct free_area *area;
unsigned int current_order;
struct page *page;
int fallback_mt;
bool can_steal;
-
--[[linux-4.4.1/free_area]]
--[[linux-4.4.1/page]]
/* Find the largest possible block of pages in the othe...
for (current_order = MAX_ORDER-1;
current_order >= order && current_order <= MAX_ORDER...
--current_order) {
area = &(zone->free_area[current_order]);
fallback_mt = find_suitable_fallback(area, current_ord...
start_migratetype, false, &can_steal);
if (fallback_mt == -1)
continue;
-
--[[linux-4.4.1/find_suitable_fallback()]]
page = list_entry(area->free_list[fallback_mt].next,
struct page, lru);
if (can_steal)
steal_suitable_fallback(zone, page, start_migratetype);
-
--[[linux-4.4.1/list_entry()]]
--[[linux-4.4.1/steal_suitable_fallback()]]
/* Remove the page from the freelists */
area->nr_free--;
list_del(&page->lru);
rmv_page_order(page);
-
--[[linux-4.4.1/list_del()]]
--[[linux-4.4.1/rmv_page_order()]]
expand(zone, page, order, current_order, area,
start_migratetype);
-
--[[linux-4.4.1/expand()]]
/*
* The pcppage_migratetype may differ from pageblock's
* migratetype depending on the decisions in
* find_suitable_fallback(). This is OK as long as it ...
* differ for MIGRATE_CMA pageblocks. Those can be use...
* fallback only via special __rmqueue_cma_fallback() ...
*/
set_pcppage_migratetype(page, start_migratetype);
-
--[[linux-4.4.1/set_pcppage_migratetype()]]
trace_mm_page_alloc_extfrag(page, order, current_order,
start_migratetype, fallback_mt);
return page;
-
--[[linux-4.4.1/trace_mm_page_alloc_extfrag()]]
}
return NULL;
}
*コメント [#t5857225]
終了行:
*参照元 [#w4ed7ec6]
#backlinks
*説明 [#af22a5c8]
-パス: [[linux-4.4.1/mm/page_alloc.c]]
-FIXME: これは何？
--説明
**引数 [#pf3dd2ed]
-struct zone *zone
--
--[[linux-4.4.1/zone]]
-unsigned int order
--
-int start_migratetype
--
**返り値 [#n4eb8dc6]
-struct page *
--
--[[linux-4.4.1/page]]
**参考 [#tf983043]
*実装 [#jb379114]
/* Remove an element from the buddy allocator from the f...
static inline struct page *
__rmqueue_fallback(struct zone *zone, unsigned int order...
{
struct free_area *area;
unsigned int current_order;
struct page *page;
int fallback_mt;
bool can_steal;
-
--[[linux-4.4.1/free_area]]
--[[linux-4.4.1/page]]
/* Find the largest possible block of pages in the othe...
for (current_order = MAX_ORDER-1;
current_order >= order && current_order <= MAX_ORDER...
--current_order) {
area = &(zone->free_area[current_order]);
fallback_mt = find_suitable_fallback(area, current_ord...
start_migratetype, false, &can_steal);
if (fallback_mt == -1)
continue;
-
--[[linux-4.4.1/find_suitable_fallback()]]
page = list_entry(area->free_list[fallback_mt].next,
struct page, lru);
if (can_steal)
steal_suitable_fallback(zone, page, start_migratetype);
-
--[[linux-4.4.1/list_entry()]]
--[[linux-4.4.1/steal_suitable_fallback()]]
/* Remove the page from the freelists */
area->nr_free--;
list_del(&page->lru);
rmv_page_order(page);
-
--[[linux-4.4.1/list_del()]]
--[[linux-4.4.1/rmv_page_order()]]
expand(zone, page, order, current_order, area,
start_migratetype);
-
--[[linux-4.4.1/expand()]]
/*
* The pcppage_migratetype may differ from pageblock's
* migratetype depending on the decisions in
* find_suitable_fallback(). This is OK as long as it ...
* differ for MIGRATE_CMA pageblocks. Those can be use...
* fallback only via special __rmqueue_cma_fallback() ...
*/
set_pcppage_migratetype(page, start_migratetype);
-
--[[linux-4.4.1/set_pcppage_migratetype()]]
trace_mm_page_alloc_extfrag(page, order, current_order,
start_migratetype, fallback_mt);
return page;
-
--[[linux-4.4.1/trace_mm_page_alloc_extfrag()]]
}
return NULL;
}
*コメント [#t5857225]
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