linux-4.4.1/unmap_and_move()
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開始行:
*参照元 [#taa07d25]
#backlinks
*説明 [#hbb765cc]
-パス: [[linux-4.4.1/mm/migrate.c]]
-FIXME: これは何？
--説明
**引数 [#jbc95353]
-new_page_t get_new_page
--
--[[linux-4.4.1/new_page_t]]
-free_page_t put_new_page
--
--[[linux-4.4.1/free_page_t]]
-unsigned long private
--
-struct page *page
--
--[[linux-4.4.1/page]]
-int force
--
-enum migrate_mode mode
--
--[[linux-4.4.1/migrate_mode]]
-enum migrate_reason reason
--
--[[linux-4.4.1/migrate_reason]]
**返り値 [#d99e7c18]
-int
--
**参考 [#j8f89e6c]
*実装 [#a03c92d2]
/*
* Obtain the lock on page, remove all ptes and migrate ...
* to the newly allocated page in newpage.
*/
static ICE_noinline int unmap_and_move(new_page_t get_ne...
free_page_t put_new_page,
unsigned long private, struct page *page,
int force, enum migrate_mode mode,
enum migrate_reason reason)
{
int rc = MIGRATEPAGE_SUCCESS;
int *result = NULL;
struct page *newpage;
-
--[[linux-4.4.1/ICE_noinline]]
newpage = get_new_page(page, private, &result);
if (!newpage)
return -ENOMEM;
-get_new_page は引数で渡されている関数ポインタ。
if (page_count(page) == 1) {
/* page was freed from under us. So we are done. */
goto out;
}
-
--[[linux-4.4.1/page_count()]]
if (unlikely(PageTransHuge(page)))
if (unlikely(split_huge_page(page)))
goto out;
-
--[[linux-4.4.1/PageTransHuge()]]
--[[linux-4.4.1/split_huge_page()]]
--[[linux-4.4.1/unlikely()]]
rc = __unmap_and_move(page, newpage, force, mode);
if (rc == MIGRATEPAGE_SUCCESS)
put_new_page = NULL;
-
--[[linux-4.4.1/__unmap_and_move()]]
out:
if (rc != -EAGAIN) {
/*
* A page that has been migrated has all references
* removed and will be freed. A page that has not been
* migrated will have kepts its references and be
* restored.
*/
list_del(&page->lru);
dec_zone_page_state(page, NR_ISOLATED_ANON +
page_is_file_cache(page));
-
--[[linux-4.4.1/list_del()]]
--[[linux-4.4.1/dec_zone_page_state()]]
--[[linux-4.4.1/page_is_file_cache()]]
/* Soft-offlined page shouldn't go through lru cache l...
if (reason == MR_MEMORY_FAILURE) {
put_page(page);
if (!test_set_page_hwpoison(page))
num_poisoned_pages_inc();
} else
putback_lru_page(page);
-
--[[linux-4.4.1/put_page()]]
--[[linux-4.4.1/test_set_page_hwpoison()]]
--[[linux-4.4.1/num_poisoned_pages_inc()]]
--[[linux-4.4.1/putback_lru_page()]]
}
/*
* If migration was not successful and there's a freein...
* it. Otherwise, putback_lru_page() will drop the ref...
* during isolation.
*/
if (put_new_page)
put_new_page(newpage, private);
-put_new_page は引数で渡されている関数ポインタ
else if (unlikely(__is_movable_balloon_page(newpage))) {
/* drop our reference, page already in the balloon */
put_page(newpage);
-
--[[linux-4.4.1/__is_movable_balloon_page()]]
--[[linux-4.4.1/put_page()]]
} else
putback_lru_page(newpage);
-
--[[linux-4.4.1/putback_lru_page()]]
if (result) {
if (rc)
*result = rc;
else
*result = page_to_nid(newpage);
}
-
--[[linux-4.4.1/page_to_nid()]]
return rc;
}
*コメント [#i5329ad1]
終了行:
*参照元 [#taa07d25]
#backlinks
*説明 [#hbb765cc]
-パス: [[linux-4.4.1/mm/migrate.c]]
-FIXME: これは何？
--説明
**引数 [#jbc95353]
-new_page_t get_new_page
--
--[[linux-4.4.1/new_page_t]]
-free_page_t put_new_page
--
--[[linux-4.4.1/free_page_t]]
-unsigned long private
--
-struct page *page
--
--[[linux-4.4.1/page]]
-int force
--
-enum migrate_mode mode
--
--[[linux-4.4.1/migrate_mode]]
-enum migrate_reason reason
--
--[[linux-4.4.1/migrate_reason]]
**返り値 [#d99e7c18]
-int
--
**参考 [#j8f89e6c]
*実装 [#a03c92d2]
/*
* Obtain the lock on page, remove all ptes and migrate ...
* to the newly allocated page in newpage.
*/
static ICE_noinline int unmap_and_move(new_page_t get_ne...
free_page_t put_new_page,
unsigned long private, struct page *page,
int force, enum migrate_mode mode,
enum migrate_reason reason)
{
int rc = MIGRATEPAGE_SUCCESS;
int *result = NULL;
struct page *newpage;
-
--[[linux-4.4.1/ICE_noinline]]
newpage = get_new_page(page, private, &result);
if (!newpage)
return -ENOMEM;
-get_new_page は引数で渡されている関数ポインタ。
if (page_count(page) == 1) {
/* page was freed from under us. So we are done. */
goto out;
}
-
--[[linux-4.4.1/page_count()]]
if (unlikely(PageTransHuge(page)))
if (unlikely(split_huge_page(page)))
goto out;
-
--[[linux-4.4.1/PageTransHuge()]]
--[[linux-4.4.1/split_huge_page()]]
--[[linux-4.4.1/unlikely()]]
rc = __unmap_and_move(page, newpage, force, mode);
if (rc == MIGRATEPAGE_SUCCESS)
put_new_page = NULL;
-
--[[linux-4.4.1/__unmap_and_move()]]
out:
if (rc != -EAGAIN) {
/*
* A page that has been migrated has all references
* removed and will be freed. A page that has not been
* migrated will have kepts its references and be
* restored.
*/
list_del(&page->lru);
dec_zone_page_state(page, NR_ISOLATED_ANON +
page_is_file_cache(page));
-
--[[linux-4.4.1/list_del()]]
--[[linux-4.4.1/dec_zone_page_state()]]
--[[linux-4.4.1/page_is_file_cache()]]
/* Soft-offlined page shouldn't go through lru cache l...
if (reason == MR_MEMORY_FAILURE) {
put_page(page);
if (!test_set_page_hwpoison(page))
num_poisoned_pages_inc();
} else
putback_lru_page(page);
-
--[[linux-4.4.1/put_page()]]
--[[linux-4.4.1/test_set_page_hwpoison()]]
--[[linux-4.4.1/num_poisoned_pages_inc()]]
--[[linux-4.4.1/putback_lru_page()]]
}
/*
* If migration was not successful and there's a freein...
* it. Otherwise, putback_lru_page() will drop the ref...
* during isolation.
*/
if (put_new_page)
put_new_page(newpage, private);
-put_new_page は引数で渡されている関数ポインタ
else if (unlikely(__is_movable_balloon_page(newpage))) {
/* drop our reference, page already in the balloon */
put_page(newpage);
-
--[[linux-4.4.1/__is_movable_balloon_page()]]
--[[linux-4.4.1/put_page()]]
} else
putback_lru_page(newpage);
-
--[[linux-4.4.1/putback_lru_page()]]
if (result) {
if (rc)
*result = rc;
else
*result = page_to_nid(newpage);
}
-
--[[linux-4.4.1/page_to_nid()]]
return rc;
}
*コメント [#i5329ad1]
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