The quilt patch titled
Subject: mm: add PG_dropbehind folio flag
has been removed from the -mm tree. Its filename was
mm-add-pg_dropbehind-folio-flag.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: Jens Axboe <axboe@xxxxxxxxx>
Subject: mm: add PG_dropbehind folio flag
Date: Fri, 20 Dec 2024 08:47:42 -0700
Add a folio flag that file IO can use to indicate that the cached IO being
done should be dropped from the page cache upon completion.
Link: https://lkml.kernel.org/r/20241220154831.1086649-5-axboe@xxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Brian Foster <bfoster@xxxxxxxxxx>
Cc: Chris Mason <clm@xxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/page-flags.h | 5 +++++
include/trace/events/mmflags.h | 3 ++-
2 files changed, 7 insertions(+), 1 deletion(-)
--- a/include/linux/page-flags.h~mm-add-pg_dropbehind-folio-flag
+++ a/include/linux/page-flags.h
@@ -110,6 +110,7 @@ enum pageflags {
PG_reclaim, /* To be reclaimed asap */
PG_swapbacked, /* Page is backed by RAM/swap */
PG_unevictable, /* Page is "unevictable" */
+ PG_dropbehind, /* drop pages on IO completion */
#ifdef CONFIG_MMU
PG_mlocked, /* Page is vma mlocked */
#endif
@@ -562,6 +563,10 @@ PAGEFLAG(Reclaim, reclaim, PF_NO_TAIL)
FOLIO_FLAG(readahead, FOLIO_HEAD_PAGE)
FOLIO_TEST_CLEAR_FLAG(readahead, FOLIO_HEAD_PAGE)
+FOLIO_FLAG(dropbehind, FOLIO_HEAD_PAGE)
+ FOLIO_TEST_CLEAR_FLAG(dropbehind, FOLIO_HEAD_PAGE)
+ __FOLIO_SET_FLAG(dropbehind, FOLIO_HEAD_PAGE)
+
#ifdef CONFIG_HIGHMEM
/*
* Must use a macro here due to header dependency issues. page_zone() is not
--- a/include/trace/events/mmflags.h~mm-add-pg_dropbehind-folio-flag
+++ a/include/trace/events/mmflags.h
@@ -116,7 +116,8 @@
DEF_PAGEFLAG_NAME(head), \
DEF_PAGEFLAG_NAME(reclaim), \
DEF_PAGEFLAG_NAME(swapbacked), \
- DEF_PAGEFLAG_NAME(unevictable) \
+ DEF_PAGEFLAG_NAME(unevictable), \
+ DEF_PAGEFLAG_NAME(dropbehind) \
IF_HAVE_PG_MLOCK(mlocked) \
IF_HAVE_PG_HWPOISON(hwpoison) \
IF_HAVE_PG_IDLE(idle) \
_
Patches currently in -mm which might be from axboe@xxxxxxxxx are
