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From: Stefan Roesch <[email protected]>
To: <[email protected]>, <[email protected]>,
	<[email protected]>, <[email protected]>
Cc: <[email protected]>
Subject: [PATCH v1 04/14] mm: Add support for async buffered writes
Date: Mon, 14 Feb 2022 09:43:53 -0800	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

This adds support for async buffered writes in the mm layer. When the
AOP_FLAGS_BUF_WASYNC flag is set, if the page is not already loaded,
the page gets created without blocking on the allocation.

Signed-off-by: Stefan Roesch <[email protected]>
---
 mm/filemap.c      | 5 +++++
 mm/folio-compat.c | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/mm/filemap.c b/mm/filemap.c
index 0ff4278c3961..19065ad95a4c 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -42,6 +42,7 @@
 #include <linux/ramfs.h>
 #include <linux/page_idle.h>
 #include <linux/migrate.h>
+#include <linux/sched/mm.h>
 #include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 #include "internal.h"
@@ -1986,6 +1987,10 @@ struct folio *__filemap_get_folio(struct address_space *mapping, pgoff_t index,
 			gfp |= __GFP_WRITE;
 		if (fgp_flags & FGP_NOFS)
 			gfp &= ~__GFP_FS;
+		if (fgp_flags & FGP_NOWAIT) {
+			gfp |= GFP_ATOMIC;
+			gfp &= ~__GFP_DIRECT_RECLAIM;
+		}
 
 		folio = filemap_alloc_folio(gfp, 0);
 		if (!folio)
diff --git a/mm/folio-compat.c b/mm/folio-compat.c
index 749555a232a8..a1d05509b29f 100644
--- a/mm/folio-compat.c
+++ b/mm/folio-compat.c
@@ -136,6 +136,10 @@ struct page *grab_cache_page_write_begin(struct address_space *mapping,
 
 	if (flags & AOP_FLAG_NOFS)
 		fgp_flags |= FGP_NOFS;
+
+	if (flags & AOP_FLAGS_NOWAIT)
+		fgp_flags |= FGP_NOWAIT;
+
 	return pagecache_get_page(mapping, index, fgp_flags,
 			mapping_gfp_mask(mapping));
 }
-- 
2.30.2


  parent reply	other threads:[~2022-02-14 17:44 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-14 17:43 [PATCH v1 00/14] Support sync buffered writes for io-uring Stefan Roesch
2022-02-14 17:43 ` [PATCH v1 01/14] fs: Add flags parameter to __block_write_begin_int Stefan Roesch
2022-02-14 19:02   ` Matthew Wilcox
2022-02-16 18:31     ` Stefan Roesch
2022-02-16 18:35       ` Matthew Wilcox
2022-02-14 17:43 ` [PATCH v1 02/14] mm: Introduce do_generic_perform_write Stefan Roesch
2022-02-14 19:06   ` Matthew Wilcox
2022-02-14 17:43 ` [PATCH v1 03/14] mm: add noio support in filemap_get_pages Stefan Roesch
2022-02-14 18:08   ` Matthew Wilcox
2022-02-16 18:27     ` Stefan Roesch
2022-02-14 19:33   ` Matthew Wilcox
2022-02-16 18:26     ` Stefan Roesch
2022-02-14 17:43 ` Stefan Roesch [this message]
2022-02-14 19:09   ` [PATCH v1 04/14] mm: Add support for async buffered writes Matthew Wilcox
2022-02-14 17:43 ` [PATCH v1 05/14] fs: split off __alloc_page_buffers function Stefan Roesch
2022-02-14 22:46   ` kernel test robot
2022-02-14 23:27   ` kernel test robot
2022-02-15  2:40   ` [RFC PATCH] fs: __alloc_page_buffers() can be static kernel test robot
2022-02-15  2:41   ` [PATCH v1 05/14] fs: split off __alloc_page_buffers function kernel test robot
2022-02-14 17:43 ` [PATCH v1 06/14] fs: split off __create_empty_buffers function Stefan Roesch
2022-02-14 17:43 ` [PATCH v1 07/14] fs: Add aop_flags parameter to create_page_buffers() Stefan Roesch
2022-02-14 18:14   ` Matthew Wilcox
2022-02-16 18:30     ` Stefan Roesch
2022-02-16 18:34       ` Matthew Wilcox
2022-02-16 18:35         ` Stefan Roesch
2022-02-14 17:43 ` [PATCH v1 08/14] fs: add support for async buffered writes Stefan Roesch
2022-02-14 17:43 ` [PATCH v1 09/14] io_uring: " Stefan Roesch
2022-02-14 17:43 ` [PATCH v1 10/14] io_uring: Add tracepoint for short writes Stefan Roesch
2022-02-14 17:44 ` [PATCH v1 11/14] sched: add new fields to task_struct Stefan Roesch
2022-02-14 17:44 ` [PATCH v1 12/14] mm: support write throttling for async buffered writes Stefan Roesch
2022-02-14 17:44 ` [PATCH v1 13/14] io_uring: " Stefan Roesch
2022-02-14 17:44 ` [PATCH v1 14/14] block: enable async buffered writes for block devices Stefan Roesch
2022-02-15  3:59 ` [PATCH v1 00/14] Support sync buffered writes for io-uring Hao Xu
2022-02-15 17:38   ` Stefan Roesch

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