linux-5.15/__reset_isolation_pfn()
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開始行:
*参照元 [#ie68ed1b]
#backlinks
*説明 [#x3793f52]
-パス: [[linux-5.15/mm/compaction.c]]
-FIXME: これは何？
--説明
**引数 [#ic7439d0]
-struct zone *zone
--
--[[linux-5.15/zone]]
-unsigned long pfn
--
-bool check_source
--
-bool check_target
--
**返り値 [#f7cffdda]
-bool
--
**参考 [#q7f7b49e]
*実装 [#kd86fe30]
static bool
__reset_isolation_pfn(struct zone *zone, unsigned long p...
bool check_target)
{
struct page *page = pfn_to_online_page(pfn);
struct page *block_page;
struct page *end_page;
unsigned long block_pfn;
if (!page)
return false;
if (zone != page_zone(page))
return false;
if (pageblock_skip_persistent(page))
return false;
-
--[[linux-5.15/pfn_to_online_page()]]
--[[linux-5.15/page_zone()]]
--[[linux-5.15/pageblock_skip_persistent()]]
/*
* If skip is already cleared do no further checking on...
* restart points have been set.
*/
if (check_source && check_target && !get_pageblock_skip...
return true;
-
--[[linux-5.15/get_pageblock_skip()]]
/*
* If clearing skip for the target scanner, do not sele...
* non-movable pageblock as the starting point.
*/
if (!check_source && check_target &&
get_pageblock_migratetype(page) != MIGRATE_MOVABLE)
return false;
-
--[[linux-5.15/get_pageblock_migratetype()]]
/* Ensure the start of the pageblock or zone is online ...
block_pfn = pageblock_start_pfn(pfn);
block_pfn = max(block_pfn, zone->zone_start_pfn);
block_page = pfn_to_online_page(block_pfn);
if (block_page) {
page = block_page;
pfn = block_pfn;
}
-
--[[linux-5.15/pageblock_start_pfn()]]
--[[linux-5.15/pfn_to_online_page()]]
/* Ensure the end of the pageblock or zone is online an...
block_pfn = pageblock_end_pfn(pfn) - 1;
block_pfn = min(block_pfn, zone_end_pfn(zone) - 1);
end_page = pfn_to_online_page(block_pfn);
if (!end_page)
return false;
-
--[[linux-5.15/pageblock_end_pfn()]]
--[[linux-5.15/zone_end_pfn()]]
--[[linux-5.15/pfn_to_online_page()]]
/*
* Only clear the hint if a sample indicates there is e...
* free page or an LRU page in the block. One or other ...
* is necessary for the block to be a migration source/...
*/
do {
if (check_source && PageLRU(page)) {
clear_pageblock_skip(page);
return true;
}
if (check_target && PageBuddy(page)) {
clear_pageblock_skip(page);
return true;
}
page += (1 << PAGE_ALLOC_COSTLY_ORDER);
pfn += (1 << PAGE_ALLOC_COSTLY_ORDER);
} while (page <= end_page);
return false;
}
-
--[[linux-5.15/PageLRU()]]
--[[linux-5.15/clear_pageblock_skip()]]
--[[linux-5.15/PageBuddy()]]
*コメント [#xe423354]
終了行:
*参照元 [#ie68ed1b]
#backlinks
*説明 [#x3793f52]
-パス: [[linux-5.15/mm/compaction.c]]
-FIXME: これは何？
--説明
**引数 [#ic7439d0]
-struct zone *zone
--
--[[linux-5.15/zone]]
-unsigned long pfn
--
-bool check_source
--
-bool check_target
--
**返り値 [#f7cffdda]
-bool
--
**参考 [#q7f7b49e]
*実装 [#kd86fe30]
static bool
__reset_isolation_pfn(struct zone *zone, unsigned long p...
bool check_target)
{
struct page *page = pfn_to_online_page(pfn);
struct page *block_page;
struct page *end_page;
unsigned long block_pfn;
if (!page)
return false;
if (zone != page_zone(page))
return false;
if (pageblock_skip_persistent(page))
return false;
-
--[[linux-5.15/pfn_to_online_page()]]
--[[linux-5.15/page_zone()]]
--[[linux-5.15/pageblock_skip_persistent()]]
/*
* If skip is already cleared do no further checking on...
* restart points have been set.
*/
if (check_source && check_target && !get_pageblock_skip...
return true;
-
--[[linux-5.15/get_pageblock_skip()]]
/*
* If clearing skip for the target scanner, do not sele...
* non-movable pageblock as the starting point.
*/
if (!check_source && check_target &&
get_pageblock_migratetype(page) != MIGRATE_MOVABLE)
return false;
-
--[[linux-5.15/get_pageblock_migratetype()]]
/* Ensure the start of the pageblock or zone is online ...
block_pfn = pageblock_start_pfn(pfn);
block_pfn = max(block_pfn, zone->zone_start_pfn);
block_page = pfn_to_online_page(block_pfn);
if (block_page) {
page = block_page;
pfn = block_pfn;
}
-
--[[linux-5.15/pageblock_start_pfn()]]
--[[linux-5.15/pfn_to_online_page()]]
/* Ensure the end of the pageblock or zone is online an...
block_pfn = pageblock_end_pfn(pfn) - 1;
block_pfn = min(block_pfn, zone_end_pfn(zone) - 1);
end_page = pfn_to_online_page(block_pfn);
if (!end_page)
return false;
-
--[[linux-5.15/pageblock_end_pfn()]]
--[[linux-5.15/zone_end_pfn()]]
--[[linux-5.15/pfn_to_online_page()]]
/*
* Only clear the hint if a sample indicates there is e...
* free page or an LRU page in the block. One or other ...
* is necessary for the block to be a migration source/...
*/
do {
if (check_source && PageLRU(page)) {
clear_pageblock_skip(page);
return true;
}
if (check_target && PageBuddy(page)) {
clear_pageblock_skip(page);
return true;
}
page += (1 << PAGE_ALLOC_COSTLY_ORDER);
pfn += (1 << PAGE_ALLOC_COSTLY_ORDER);
} while (page <= end_page);
return false;
}
-
--[[linux-5.15/PageLRU()]]
--[[linux-5.15/clear_pageblock_skip()]]
--[[linux-5.15/PageBuddy()]]
*コメント [#xe423354]
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