The patch titled
Subject: mm, madvise: change PAGEREF_RECLAIM_CLEAN with PAGE_REFRECLAIM
has been added to the -mm tree. Its filename is
mm-change-pageref_reclaim_clean-with-page_refreclaim.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-change-pageref_reclaim_clean-with-page_refreclaim.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-change-pageref_reclaim_clean-with-page_refreclaim.patch
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------------------------------------------------------
From: Minchan Kim <minchan@xxxxxxxxxx>
Subject: mm, madvise: change PAGEREF_RECLAIM_CLEAN with PAGE_REFRECLAIM
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/20190723062539.198697-3-minchan@xxxxxxxxxx
Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Daniel Colascione <dancol@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Hillf Danton <hdanton@xxxxxxxx>
Cc: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Oleksandr Natalenko <oleksandr@xxxxxxxxxx>
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Sonny Rao <sonnyrao@xxxxxxxxxx>
Cc: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Cc: Tim Murray <timmurray@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/mm/vmscan.c~mm-change-pageref_reclaim_clean-with-page_refreclaim
+++ a/mm/vmscan.c
@@ -1124,7 +1124,7 @@ static unsigned long shrink_page_list(st
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);
@@ -1138,7 +1138,7 @@ static unsigned long shrink_page_list(st
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;
unsigned int nr_pages;
@@ -1269,7 +1269,7 @@ static unsigned long shrink_page_list(st
}
}
- if (!force_reclaim)
+ if (!ignore_references)
references = page_check_references(page, sc);
switch (references) {
_
Patches currently in -mm which might be from minchan@xxxxxxxxxx are
mm-introduce-madv_cold.patch
mm-change-pageref_reclaim_clean-with-page_refreclaim.patch
mm-account-nr_isolated_xxx-in-_lru_page.patch
mm-introduce-madv_pageout.patch
mm-factor-out-common-parts-between-madv_cold-and-madv_pageout.patch
