From: Jens Axboe <axboe@fb.com>
To: <axboe@kernel.dk>, <linux-kernel@vger.kernel.org>,
<linux-fsdevel@vger.kernel.org>, <linux-block@vger.kernel.org>
Cc: Jens Axboe <axboe@fb.com>
Subject: [PATCH 1/8] block: add WRITE_BG
Date: Wed, 7 Sep 2016 08:46:43 -0600 [thread overview]
Message-ID: <1473259610-3295-2-git-send-email-axboe@fb.com> (raw)
In-Reply-To: <1473259610-3295-1-git-send-email-axboe@fb.com>
This adds a new request flag, REQ_BG, that callers can use to tell
the block layer that this is background (non-urgent) IO.
Signed-off-by: Jens Axboe <axboe@fb.com>
---
include/linux/blk_types.h | 4 +++-
include/linux/fs.h | 3 +++
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 436f43f87da9..be4409b6ae4f 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -155,6 +155,7 @@ enum rq_flag_bits {
__REQ_INTEGRITY, /* I/O includes block integrity payload */
__REQ_FUA, /* forced unit access */
__REQ_PREFLUSH, /* request for cache flush */
+ __REQ_BG, /* background activity */
/* bio only flags */
__REQ_RAHEAD, /* read ahead, can fail anytime */
@@ -198,7 +199,7 @@ enum rq_flag_bits {
(REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER)
#define REQ_COMMON_MASK \
(REQ_FAILFAST_MASK | REQ_SYNC | REQ_META | REQ_PRIO | REQ_NOIDLE | \
- REQ_PREFLUSH | REQ_FUA | REQ_INTEGRITY | REQ_NOMERGE)
+ REQ_PREFLUSH | REQ_FUA | REQ_INTEGRITY | REQ_NOMERGE | REQ_BG)
#define REQ_CLONE_MASK REQ_COMMON_MASK
/* This mask is used for both bio and request merge checking */
@@ -223,6 +224,7 @@ enum rq_flag_bits {
#define REQ_COPY_USER (1ULL << __REQ_COPY_USER)
#define REQ_PREFLUSH (1ULL << __REQ_PREFLUSH)
#define REQ_FLUSH_SEQ (1ULL << __REQ_FLUSH_SEQ)
+#define REQ_BG (1ULL << __REQ_BG)
#define REQ_IO_STAT (1ULL << __REQ_IO_STAT)
#define REQ_MIXED_MERGE (1ULL << __REQ_MIXED_MERGE)
#define REQ_PM (1ULL << __REQ_PM)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 901e25d495cc..7c7951f1166a 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -189,6 +189,8 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
* WRITE_FLUSH_FUA Combination of WRITE_FLUSH and FUA. The IO is preceded
* by a cache flush and data is guaranteed to be on
* non-volatile media on completion.
+ * WRITE_BG Background write. This is for background activity like
+ * the periodic flush and background threshold writeback
*
*/
#define RW_MASK REQ_OP_WRITE
@@ -202,6 +204,7 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
#define WRITE_FLUSH (REQ_SYNC | REQ_NOIDLE | REQ_PREFLUSH)
#define WRITE_FUA (REQ_SYNC | REQ_NOIDLE | REQ_FUA)
#define WRITE_FLUSH_FUA (REQ_SYNC | REQ_NOIDLE | REQ_PREFLUSH | REQ_FUA)
+#define WRITE_BG (REQ_NOIDLE | REQ_BG)
/*
* Attribute flags. These should be or-ed together to figure out what
--
2.7.4
next prev parent reply other threads:[~2016-09-07 14:46 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-07 14:46 [PATCH 0/8] Throttled background buffered writeback v7 Jens Axboe
2016-09-07 14:46 ` Jens Axboe [this message]
2016-09-07 14:46 ` [PATCH 2/8] writeback: add wbc_to_write_flags() Jens Axboe
2016-09-07 14:46 ` [PATCH 3/8] writeback: use WRITE_BG for kupdate and background writeback Jens Axboe
2016-09-07 14:46 ` [PATCH 4/8] writeback: track if we're sleeping on progress in balance_dirty_pages() Jens Axboe
2016-09-07 14:46 ` [PATCH 5/8] block: add code to track actual device queue depth Jens Axboe
2016-09-07 14:46 ` [PATCH 6/8] block: add scalable completion tracking of requests Jens Axboe
2016-09-07 14:46 ` [PATCH 7/8] wbt: add general throttling mechanism Jens Axboe
2016-09-07 14:46 ` [PATCH 8/8] writeback: throttle buffered writeback Jens Axboe
2016-09-09 9:02 ` [PATCH 0/8] Throttled background buffered writeback v7 Paolo Valente
2016-09-09 9:02 ` Paolo Valente
-- strict thread matches above, loose matches on Subject: below --
2016-10-26 20:52 [PATCHSET] block: buffered writeback throttling Jens Axboe
2016-10-26 20:52 ` [PATCH 1/8] block: add WRITE_BG Jens Axboe
2016-10-27 6:37 ` Christoph Hellwig
2016-10-28 14:57 ` Jens Axboe
2016-10-28 14:57 ` Jens Axboe
2016-08-31 17:05 [PATCHSET v6] Throttled background buffered writeback Jens Axboe
2016-08-31 17:05 ` [PATCH 1/8] block: add WRITE_BG Jens Axboe
2016-09-01 7:55 ` Johannes Thumshirn
2016-09-01 7:55 ` Johannes Thumshirn
2016-09-01 7:59 ` Johannes Thumshirn
2016-09-01 7:59 ` Johannes Thumshirn
2016-04-26 15:55 [PATCHSET v5] Make background writeback great again for the first time Jens Axboe
2016-04-26 15:55 ` [PATCH 1/8] block: add WRITE_BG Jens Axboe
2016-04-18 4:24 [PATCHSET v4 0/8] Make background writeback not suck Jens Axboe
2016-04-18 4:24 ` [PATCH 1/8] block: add WRITE_BG Jens Axboe
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