The quilt patch titled
Subject: mm: refactor folio_undo_large_rmappable()
has been removed from the -mm tree. Its filename was
mm-refactor-folio_undo_large_rmappable.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Subject: mm: refactor folio_undo_large_rmappable()
Date: Tue, 21 May 2024 21:03:15 +0800
Folios of order <= 1 are not in deferred list, the check of order is added
into folio_undo_large_rmappable() from commit 8897277acfef ("mm: support
order-1 folios in the page cache"), but there is a repeated check for
small folio (order 0) during each call of the
folio_undo_large_rmappable(), so only keep folio_order() check inside the
function.
In addition, move all the checks into header file to save a function call
for non-large-rmappable or empty deferred_list folio.
Link: https://lkml.kernel.org/r/20240521130315.46072-1-wangkefeng.wang@xxxxxxxxxx
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Lance Yang <ioworker0@xxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Cc: Roman Gushchin <roman.gushchin@xxxxxxxxx>
Cc: Shakeel Butt <shakeel.butt@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/huge_memory.c | 13 +------------
mm/internal.h | 17 ++++++++++++++++-
mm/page_alloc.c | 3 +--
mm/swap.c | 8 ++------
mm/vmscan.c | 8 ++------
5 files changed, 22 insertions(+), 27 deletions(-)
--- a/mm/huge_memory.c~mm-refactor-folio_undo_large_rmappable
+++ a/mm/huge_memory.c
@@ -3258,22 +3258,11 @@ out:
return ret;
}
-void folio_undo_large_rmappable(struct folio *folio)
+void __folio_undo_large_rmappable(struct folio *folio)
{
struct deferred_split *ds_queue;
unsigned long flags;
- if (folio_order(folio) <= 1)
- return;
-
- /*
- * At this point, there is no one trying to add the folio to
- * deferred_list. If folio is not in deferred_list, it's safe
- * to check without acquiring the split_queue_lock.
- */
- if (data_race(list_empty(&folio->_deferred_list)))
- return;
-
ds_queue = get_deferred_split_queue(folio);
spin_lock_irqsave(&ds_queue->split_queue_lock, flags);
if (!list_empty(&folio->_deferred_list)) {
--- a/mm/internal.h~mm-refactor-folio_undo_large_rmappable
+++ a/mm/internal.h
@@ -622,7 +622,22 @@ static inline void folio_set_order(struc
#endif
}
-void folio_undo_large_rmappable(struct folio *folio);
+void __folio_undo_large_rmappable(struct folio *folio);
+static inline void folio_undo_large_rmappable(struct folio *folio)
+{
+ if (folio_order(folio) <= 1 || !folio_test_large_rmappable(folio))
+ return;
+
+ /*
+ * At this point, there is no one trying to add the folio to
+ * deferred_list. If folio is not in deferred_list, it's safe
+ * to check without acquiring the split_queue_lock.
+ */
+ if (data_race(list_empty(&folio->_deferred_list)))
+ return;
+
+ __folio_undo_large_rmappable(folio);
+}
static inline struct folio *page_rmappable_folio(struct page *page)
{
--- a/mm/page_alloc.c~mm-refactor-folio_undo_large_rmappable
+++ a/mm/page_alloc.c
@@ -2661,8 +2661,7 @@ void free_unref_folios(struct folio_batc
unsigned long pfn = folio_pfn(folio);
unsigned int order = folio_order(folio);
- if (order > 0 && folio_test_large_rmappable(folio))
- folio_undo_large_rmappable(folio);
+ folio_undo_large_rmappable(folio);
if (!free_pages_prepare(&folio->page, order))
continue;
/*
--- a/mm/swap.c~mm-refactor-folio_undo_large_rmappable
+++ a/mm/swap.c
@@ -123,8 +123,7 @@ void __folio_put(struct folio *folio)
}
page_cache_release(folio);
- if (folio_test_large(folio) && folio_test_large_rmappable(folio))
- folio_undo_large_rmappable(folio);
+ folio_undo_large_rmappable(folio);
mem_cgroup_uncharge(folio);
free_unref_page(&folio->page, folio_order(folio));
}
@@ -1002,10 +1001,7 @@ void folios_put_refs(struct folio_batch
free_huge_folio(folio);
continue;
}
- if (folio_test_large(folio) &&
- folio_test_large_rmappable(folio))
- folio_undo_large_rmappable(folio);
-
+ folio_undo_large_rmappable(folio);
__page_cache_release(folio, &lruvec, &flags);
if (j != i)
--- a/mm/vmscan.c~mm-refactor-folio_undo_large_rmappable
+++ a/mm/vmscan.c
@@ -1439,9 +1439,7 @@ free_it:
*/
nr_reclaimed += nr_pages;
- if (folio_test_large(folio) &&
- folio_test_large_rmappable(folio))
- folio_undo_large_rmappable(folio);
+ folio_undo_large_rmappable(folio);
if (folio_batch_add(&free_folios, folio) == 0) {
mem_cgroup_uncharge_folios(&free_folios);
try_to_unmap_flush();
@@ -1848,9 +1846,7 @@ static unsigned int move_folios_to_lru(s
if (unlikely(folio_put_testzero(folio))) {
__folio_clear_lru_flags(folio);
- if (folio_test_large(folio) &&
- folio_test_large_rmappable(folio))
- folio_undo_large_rmappable(folio);
+ folio_undo_large_rmappable(folio);
if (folio_batch_add(&free_folios, folio) == 0) {
spin_unlock_irq(&lruvec->lru_lock);
mem_cgroup_uncharge_folios(&free_folios);
_
Patches currently in -mm which might be from wangkefeng.wang@xxxxxxxxxx are
mm-move-memory_failure_queue-into-copy_mc__highpage.patch
mm-add-folio_mc_copy.patch
mm-migrate-split-folio_migrate_mapping.patch
mm-migrate-support-poisoned-recover-from-migrate-folio.patch
fs-hugetlbfs-support-poisoned-recover-from-hugetlbfs_migrate_folio.patch
mm-migrate-remove-folio_migrate_copy.patch
