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* [RFC PATCH 0/2]  blk-mq I/O scheduling fixes
@ 2019-09-19  9:45 Hannes Reinecke
  2019-09-19  9:45 ` [PATCH 1/2] blk-mq: fixup request re-insert in blk_mq_try_issue_list_directly() Hannes Reinecke
                   ` (4 more replies)
  0 siblings, 5 replies; 19+ messages in thread
From: Hannes Reinecke @ 2019-09-19  9:45 UTC (permalink / raw)
  To: Jens Axboe
  Cc: linux-scsi, Martin K. Petersen, James Bottomley,
	Christoph Hellwig, linux-block, Hans Holmberg, Damien Le Moal,
	Hannes Reinecke

Hi all,

Damien pointed out that there are some areas in the blk-mq I/O
scheduling algorithm which have a distinct legacy feel to it,
and prohibit multiqueue I/O schedulers from working properly.
These two patches should clear up this situation, but as it's
not quite clear what the original intention of the code was
I'll be posting them as an RFC.

So as usual, comments and reviews are welcome.

Hannes Reinecke (2):
  blk-mq: fixup request re-insert in blk_mq_try_issue_list_directly()
  blk-mq: always call into the scheduler in blk_mq_make_request()

 block/blk-mq.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

-- 
2.16.4


^ permalink raw reply	[flat|nested] 19+ messages in thread

end of thread, other threads:[~2019-09-21 15:27 UTC | newest]

Thread overview: 19+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-09-19  9:45 [RFC PATCH 0/2] blk-mq I/O scheduling fixes Hannes Reinecke
2019-09-19  9:45 ` [PATCH 1/2] blk-mq: fixup request re-insert in blk_mq_try_issue_list_directly() Hannes Reinecke
2019-09-19 14:19   ` Ming Lei
2019-09-20  6:42     ` Hannes Reinecke
2019-09-19 14:52   ` Guoqing Jiang
2019-09-19  9:45 ` [PATCH 2/2] blk-mq: always call into the scheduler in blk_mq_make_request() Hannes Reinecke
2019-09-19 10:21   ` Damien Le Moal
2019-09-19 14:23     ` Ming Lei
2019-09-19 15:48       ` Kashyap Desai
2019-09-19 16:13         ` Damien Le Moal
2019-09-21 15:26   ` [blk] b91f4a426e: fio.write_bw_MBps -9.3% regression kernel test robot
2019-09-21 15:26     ` kernel test robot
2019-09-19  9:56 ` [RFC PATCH 0/2] blk-mq I/O scheduling fixes Liu, Sunny
2019-09-19 10:03   ` Damien Le Moal
     [not found]     ` <BJXPR01MB0296594F3E478B5BFD4DA2ABF4890@BJXPR01MB0296.CHNPR01.prod.partner.outlook.cn>
2019-09-19 12:44       ` Damien Le Moal
2019-09-19 12:54         ` Liu, Sunny
2019-09-19 12:57 ` Hans Holmberg
2019-09-19 17:48 ` Jens Axboe
2019-09-19 21:11   ` Damien Le Moal

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