From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>
Cc: Bart Van Assche <bvanassche@acm.org>,
Damien Le Moal <dlemoal@kernel.org>,
linux-block@vger.kernel.org
Subject: less special casing for flush requests v2
Date: Fri, 19 May 2023 06:40:43 +0200 [thread overview]
Message-ID: <20230519044050.107790-1-hch@lst.de> (raw)
Hi all,
inspired by Barts quest for less reording during requeues, this series
aims to limit the scope of requeues. This is mostly done by simply
sending down more than we currently do down the normal submission path
with the help of Bart's patch to allow requests that are in the flush
state machine to still be seen by the I/O schedulers.
Changes since v1:
- rebased
- fix a bug in the blk state machine insertation order
Diffstat:
block/blk-flush.c | 110 +++++++++++++++++++++++++++----------------------
block/blk-mq-debugfs.c | 1
block/blk-mq.c | 54 ++++++++----------------
block/blk-mq.h | 5 --
block/blk.h | 2
include/linux/blk-mq.h | 31 +++++--------
include/linux/blkdev.h | 1
7 files changed, 94 insertions(+), 110 deletions(-)
next reply other threads:[~2023-05-19 4:41 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-19 4:40 Christoph Hellwig [this message]
2023-05-19 4:40 ` [PATCH 1/7] blk-mq: factor out a blk_rq_init_flush helper Christoph Hellwig
2023-05-19 18:54 ` Bart Van Assche
2023-05-19 4:40 ` [PATCH 2/7] blk-mq: reflow blk_insert_flush Christoph Hellwig
2023-05-19 19:38 ` Bart Van Assche
2023-05-19 4:40 ` [PATCH 3/7] blk-mq: defer to the normal submission path for non-flush flush commands Christoph Hellwig
2023-05-19 4:40 ` [PATCH 4/7] blk-mq: use the I/O scheduler for writes from the flush state machine Christoph Hellwig
2023-05-19 19:44 ` Bart Van Assche
2023-05-24 5:53 ` Christoph Hellwig
2023-05-24 18:07 ` Bart Van Assche
2023-05-25 8:14 ` Christoph Hellwig
2023-05-28 20:50 ` Bart Van Assche
2023-05-30 14:55 ` Christoph Hellwig
2023-05-31 13:34 ` Bart Van Assche
2023-05-31 15:00 ` Christoph Hellwig
2023-05-19 4:40 ` [PATCH 5/7] blk-mq: defer to the normal submission path for post-flush requests Christoph Hellwig
2023-05-19 19:42 ` Bart Van Assche
2023-05-19 4:40 ` [PATCH 6/7] blk-mq: do not do head insertions post-pre-flush commands Christoph Hellwig
2023-05-19 4:40 ` [PATCH 7/7] blk-mq: don't use the requeue list to queue flush commands Christoph Hellwig
2023-05-19 19:55 ` Bart Van Assche
2023-05-20 4:56 ` Christoph Hellwig
2023-05-21 14:06 ` Bart Van Assche
2023-05-20 1:53 ` less special casing for flush requests v2 Jens Axboe
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