From: Jérôme Glisse <jglisse@xxxxxxxxxx>
New code will need to be able to differentiate between a regular unmap and
an unmap trigger by vmscan in which case we want to be as quick as possible.
Signed-off-by: Jérôme Glisse <jglisse@xxxxxxxxxx>
---
include/linux/rmap.h | 7 ++++---
mm/memory-failure.c | 2 +-
mm/vmscan.c | 4 ++--
3 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index b66c211..575851f 100644
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -72,9 +72,10 @@ struct anon_vma_chain {
};
enum ttu_flags {
- TTU_UNMAP = 0, /* unmap mode */
- TTU_MIGRATION = 1, /* migration mode */
- TTU_MUNLOCK = 2, /* munlock mode */
+ TTU_VMSCAN = 0, /* unmap for vmscan mode */
+ TTU_POISON = 1, /* unmap mode */
+ TTU_MIGRATION = 2, /* migration mode */
+ TTU_MUNLOCK = 3, /* munlock mode */
TTU_ACTION_MASK = 0xff,
TTU_IGNORE_MLOCK = (1 << 8), /* ignore mlock */
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index efb55b3..c61722b 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -854,7 +854,7 @@ static int page_action(struct page_state *ps, struct page *p,
static int hwpoison_user_mappings(struct page *p, unsigned long pfn,
int trapno, int flags, struct page **hpagep)
{
- enum ttu_flags ttu = TTU_UNMAP | TTU_IGNORE_MLOCK | TTU_IGNORE_ACCESS;
+ enum ttu_flags ttu = TTU_POISON | TTU_IGNORE_MLOCK | TTU_IGNORE_ACCESS;
struct address_space *mapping;
LIST_HEAD(tokill);
int ret;
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 049f324..e261fc5 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1158,7 +1158,7 @@ unsigned long reclaim_clean_pages_from_list(struct zone *zone,
}
ret = shrink_page_list(&clean_pages, zone, &sc,
- TTU_UNMAP|TTU_IGNORE_ACCESS,
+ TTU_VMSCAN|TTU_IGNORE_ACCESS,
&dummy1, &dummy2, &dummy3, &dummy4, &dummy5, true);
list_splice(&clean_pages, page_list);
mod_zone_page_state(zone, NR_ISOLATED_FILE, -ret);
@@ -1511,7 +1511,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
if (nr_taken == 0)
return 0;
- nr_reclaimed = shrink_page_list(&page_list, zone, sc, TTU_UNMAP,
+ nr_reclaimed = shrink_page_list(&page_list, zone, sc, TTU_VMSCAN,
&nr_dirty, &nr_unqueued_dirty, &nr_congested,
&nr_writeback, &nr_immediate,
false);
--
1.9.0
--
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