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From: Jens Axboe <axboe@kernel.dk>
To: io-uring@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org, Jens Axboe <axboe@kernel.dk>
Subject: [PATCH 01/11] block: read-ahead submission should imply no-wait as well
Date: Fri, 22 May 2020 19:50:39 -0600
Message-ID: <20200523015049.14808-2-axboe@kernel.dk> (raw)
In-Reply-To: <20200523015049.14808-1-axboe@kernel.dk>

As read-ahead is opportunistic, don't block for request allocation.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 include/linux/blk_types.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index ccb895f911b1..c296463c15eb 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -374,7 +374,8 @@ enum req_flag_bits {
 #define REQ_INTEGRITY		(1ULL << __REQ_INTEGRITY)
 #define REQ_FUA			(1ULL << __REQ_FUA)
 #define REQ_PREFLUSH		(1ULL << __REQ_PREFLUSH)
-#define REQ_RAHEAD		(1ULL << __REQ_RAHEAD)
+#define REQ_RAHEAD		\
+	((1ULL << __REQ_RAHEAD) | (1ULL << __REQ_NOWAIT))
 #define REQ_BACKGROUND		(1ULL << __REQ_BACKGROUND)
 #define REQ_NOWAIT		(1ULL << __REQ_NOWAIT)
 #define REQ_CGROUP_PUNT		(1ULL << __REQ_CGROUP_PUNT)
-- 
2.26.2


  reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-23  1:50 [PATCHSET v2 RFC 0/11] Add support for async buffered reads Jens Axboe
2020-05-23  1:50 ` Jens Axboe [this message]
2020-05-23  1:50 ` [PATCH 02/11] mm: allow read-ahead with IOCB_NOWAIT set Jens Axboe
2020-05-23  1:50 ` [PATCH 03/11] mm: add support for async page locking Jens Axboe
2020-05-23  1:50 ` [PATCH 04/11] mm: support async buffered reads in generic_file_buffered_read() Jens Axboe
2020-05-23  1:50 ` [PATCH 05/11] fs: add FMODE_BUF_RASYNC Jens Axboe
2020-05-23  1:50 ` [PATCH 06/11] ext4: flag as supporting buffered async reads Jens Axboe
2020-05-23  1:50 ` [PATCH 07/11] block: flag block devices as supporting IOCB_WAITQ Jens Axboe
2020-05-23  1:50 ` [PATCH 08/11] xfs: flag files as supporting buffered async reads Jens Axboe
2020-05-23  1:50 ` [PATCH 09/11] btrfs: " Jens Axboe
2020-05-23  1:50 ` [PATCH 10/11] mm: add kiocb_wait_page_async_init() helper Jens Axboe
2020-05-23  1:50 ` [PATCH 11/11] io_uring: support true async buffered reads, if file provides it Jens Axboe
  -- strict thread matches above, loose matches on Subject: below --
2020-05-22 20:23 [PATCHSET RFC 0/11] Add support for async buffered reads Jens Axboe
2020-05-22 20:23 ` [PATCH 01/11] block: read-ahead submission should imply no-wait as well Jens Axboe

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