linux-4.4.1/free_hot_cold_page()
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開始行:
*参照元 [#kd956419]
#backlinks
*説明 [#ec3ebf68]
-パス: [[linux-4.4.1/mm/page_alloc.c]]
-FIXME: これは何？
--説明
**引数 [#kb236a39]
-struct page *page
--
--[[linux-4.4.1/page]]
-bool cold
--
**返り値 [#ab610a56]
-なし
**参考 [#q0b9c027]
*実装 [#n5344d54]
/*
* Free a 0-order page
* cold == true ? free a cold page : free a hot page
*/
void free_hot_cold_page(struct page *page, bool cold)
{
struct zone *zone = page_zone(page);
struct per_cpu_pages *pcp;
unsigned long flags;
unsigned long pfn = page_to_pfn(page);
int migratetype;
-
--[[linux-4.4.1/zone]]
--[[linux-4.4.1/page_zone()]]
--[[linux-4.4.1/per_cpu_pages]]
--[[linux-4.4.1/page_to_pfn()]]
if (!free_pages_prepare(page, 0))
return;
-
--[[linux-4.4.1/free_pages_prepare()]]
migratetype = get_pfnblock_migratetype(page, pfn);
set_pcppage_migratetype(page, migratetype);
local_irq_save(flags);
__count_vm_event(PGFREE);
-
--[[linux-4.4.1/get_pnfblock_migratetype()]]
--[[linux-4.4.1/set_pcppage_migratetype()]]
--[[linux-4.4.1/local_irq_save()]]
--[[linux-4.4.1/__count_vm_event()]]
/*
* We only track unmovable, reclaimable and mova...
* Free ISOLATE pages back to the allocator beca...
* offlined but treat RESERVE as movable pages s...
* areas back if necessary. Otherwise, we may ha...
* excessively into the page allocator
*/
if (migratetype >= MIGRATE_PCPTYPES) {
if (unlikely(is_migrate_isolate(migratet...
free_one_page(zone, page, pfn, 0...
goto out;
-
--[[linux-4.4.1/MIGRATE_PCPTYPES]]
--[[linux-4.4.1/unlikely()]]
--[[linux-4.4.1/is_migrate_isolate()]]
--[[linux-4.4.1/free_one_page()]]
}
migratetype = MIGRATE_MOVABLE;
-
--[[linux-4.4.1/MIGRATE_MOVABLE]]
}
pcp = &this_cpu_ptr(zone->pageset)->pcp;
if (!cold)
list_add(&page->lru, &pcp->lists[migrate...
else
list_add_tail(&page->lru, &pcp->lists[mi...
-
--[[linux-4.4.1/this_cpu_ptr()]]
--[[linux-4.4.1/list_add()]]
--[[linux-4.4.1/list_add_tail()]]
pcp->count++;
if (pcp->count >= pcp->high) {
unsigned long batch = READ_ONCE(pcp->bat...
free_pcppages_bulk(zone, batch, pcp);
pcp->count -= batch;
}
out:
local_irq_restore(flags);
}
*コメント [#i782d9be]
終了行:
*参照元 [#kd956419]
#backlinks
*説明 [#ec3ebf68]
-パス: [[linux-4.4.1/mm/page_alloc.c]]
-FIXME: これは何？
--説明
**引数 [#kb236a39]
-struct page *page
--
--[[linux-4.4.1/page]]
-bool cold
--
**返り値 [#ab610a56]
-なし
**参考 [#q0b9c027]
*実装 [#n5344d54]
/*
* Free a 0-order page
* cold == true ? free a cold page : free a hot page
*/
void free_hot_cold_page(struct page *page, bool cold)
{
struct zone *zone = page_zone(page);
struct per_cpu_pages *pcp;
unsigned long flags;
unsigned long pfn = page_to_pfn(page);
int migratetype;
-
--[[linux-4.4.1/zone]]
--[[linux-4.4.1/page_zone()]]
--[[linux-4.4.1/per_cpu_pages]]
--[[linux-4.4.1/page_to_pfn()]]
if (!free_pages_prepare(page, 0))
return;
-
--[[linux-4.4.1/free_pages_prepare()]]
migratetype = get_pfnblock_migratetype(page, pfn);
set_pcppage_migratetype(page, migratetype);
local_irq_save(flags);
__count_vm_event(PGFREE);
-
--[[linux-4.4.1/get_pnfblock_migratetype()]]
--[[linux-4.4.1/set_pcppage_migratetype()]]
--[[linux-4.4.1/local_irq_save()]]
--[[linux-4.4.1/__count_vm_event()]]
/*
* We only track unmovable, reclaimable and mova...
* Free ISOLATE pages back to the allocator beca...
* offlined but treat RESERVE as movable pages s...
* areas back if necessary. Otherwise, we may ha...
* excessively into the page allocator
*/
if (migratetype >= MIGRATE_PCPTYPES) {
if (unlikely(is_migrate_isolate(migratet...
free_one_page(zone, page, pfn, 0...
goto out;
-
--[[linux-4.4.1/MIGRATE_PCPTYPES]]
--[[linux-4.4.1/unlikely()]]
--[[linux-4.4.1/is_migrate_isolate()]]
--[[linux-4.4.1/free_one_page()]]
}
migratetype = MIGRATE_MOVABLE;
-
--[[linux-4.4.1/MIGRATE_MOVABLE]]
}
pcp = &this_cpu_ptr(zone->pageset)->pcp;
if (!cold)
list_add(&page->lru, &pcp->lists[migrate...
else
list_add_tail(&page->lru, &pcp->lists[mi...
-
--[[linux-4.4.1/this_cpu_ptr()]]
--[[linux-4.4.1/list_add()]]
--[[linux-4.4.1/list_add_tail()]]
pcp->count++;
if (pcp->count >= pcp->high) {
unsigned long batch = READ_ONCE(pcp->bat...
free_pcppages_bulk(zone, batch, pcp);
pcp->count -= batch;
}
out:
local_irq_restore(flags);
}
*コメント [#i782d9be]
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