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mm/swap.c: trivial mark_page_accessed() cleanup 

This avoids duplicated PageReferenced() calls.  No behavior change.

Link: http://lkml.kernel.org/r/20191016225326.GB12497@wfg-t540p.sh.intel.com
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Liu Jingqi <jingqi.liu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Fengguang Wu 2019-11-30 17:50:00 -08:00 committed by Linus Torvalds
parent 12d2966d85
commit a1100a7406
1 changed files with 9 additions and 4 deletions
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13
mm/swap.c
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@ -373,9 +373,16 @@ static void __lru_cache_activate_page(struct page *page)
void mark_page_accessed(struct page *page)
{
page = compound_head(page);
if (!PageActive(page) && !PageUnevictable(page) &&
PageReferenced(page)) {
if (!PageReferenced(page)) {
SetPageReferenced(page);
} else if (PageUnevictable(page)) {
/*
* Unevictable pages are on the "LRU_UNEVICTABLE" list. But,
* this list is never rotated or maintained, so marking an
* evictable page accessed has no effect.
*/
} else if (!PageActive(page)) {
/*
* If the page is on the LRU, queue it for activation via
* activate_page_pvecs. Otherwise, assume the page is on a
@ -389,8 +396,6 @@ void mark_page_accessed(struct page *page)
ClearPageReferenced(page);
if (page_is_file_cache(page))
workingset_activation(page);
} else if (!PageReferenced(page)) {
SetPageReferenced(page);
}
if (page_is_idle(page))
clear_page_idle(page);