From a0747c913cc37ca93c52d06dfe2597e4df9c927f Mon Sep 17 00:00:00 2001 From: Minchan Kim Date: Wed, 25 Sep 2019 16:49:11 -0700 Subject: [PATCH] mm: change PAGEREF_RECLAIM_CLEAN with PAGE_REFRECLAIM commit 8940b34a4e082ae11498ddae8432f2ac07685d1c upstream The local variable references in shrink_page_list is PAGEREF_RECLAIM_CLEAN as default. It is for preventing to reclaim dirty pages when CMA try to migrate pages. Strictly speaking, we don't need it because CMA didn't allow to write out by .may_writepage = 0 in reclaim_clean_pages_from_list. Moreover, it has a problem to prevent anonymous pages's swap out even though force_reclaim = true in shrink_page_list on upcoming patch. So this patch makes references's default value to PAGEREF_RECLAIM and rename force_reclaim with ignore_references to make it more clear. This is a preparatory work for next patch. Link: http://lkml.kernel.org/r/20190726023435.214162-3-minchan@kernel.org Signed-off-by: Minchan Kim Acked-by: Michal Hocko Acked-by: Johannes Weiner Cc: Chris Zankel Cc: Daniel Colascione Cc: Dave Hansen Cc: Hillf Danton Cc: James E.J. Bottomley Cc: Joel Fernandes (Google) Cc: kbuild test robot Cc: Kirill A. Shutemov Cc: Oleksandr Natalenko Cc: Ralf Baechle Cc: Richard Henderson Cc: Shakeel Butt Cc: Sonny Rao Cc: Suren Baghdasaryan Cc: Tim Murray Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Reviewed-by: Yang Shi Signed-off-by: Xunlei Pang --- mm/vmscan.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index da5a52ca3228..3313d48a6811 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1182,7 +1182,7 @@ static unsigned long shrink_page_list(struct list_head *page_list, struct scan_control *sc, enum ttu_flags ttu_flags, struct reclaim_stat *stat, - bool force_reclaim) + bool ignore_references) { LIST_HEAD(ret_pages); LIST_HEAD(free_pages); @@ -1202,7 +1202,7 @@ static unsigned long shrink_page_list(struct list_head *page_list, struct address_space *mapping; struct page *page; int may_enter_fs; - enum page_references references = PAGEREF_RECLAIM_CLEAN; + enum page_references references = PAGEREF_RECLAIM; bool dirty, writeback; cond_resched(); @@ -1334,7 +1334,7 @@ static unsigned long shrink_page_list(struct list_head *page_list, } } - if (!force_reclaim) + if (!ignore_references) references = page_check_references(page, sc); switch (references) { -- GitLab