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Jens Axboe c13660a08c blk-mq-sched: change ->dispatch_requests() to ->dispatch_request() 
When we invoke dispatch_requests(), the scheduler empties everything
into the passed in list. This isn't always a good thing, since it
means that we remove items that we could have potentially merged
with.

Change the function to dispatch single requests at the time. If
we do that, we can backoff exactly at the point where the device
can't consume more IO, and leave the rest with the scheduler for
better merging and future dispatch decision making.

Signed-off-by: Jens Axboe <axboe@fb.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Tested-by: Hannes Reinecke <hare@suse.com>
History 2017-01-27 08:20:35 -07:00
..
acpi More ACPI updates for v4.10-rc1 2016-12-22 10:19:32 -08:00
asm-generic asm-prototypes: Clear any CPP defines before declaring the functions 2017-01-05 12:57:42 +01:00
clocksource ARM: sa11x0/pxa: acquire timer rate from the clock rate 2016-10-18 09:12:36 +02:00
crypto This pull contains one set of changes: a conversion of the crypto DocBook 2016-12-17 16:00:34 -08:00
drm Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
dt-bindings dt-bindings: mfd: Remove TPS65217 interrupts 2016-12-27 10:06:00 -08:00
keys KEYS: Strip trailing spaces 2016-06-14 10:29:44 +01:00
kvm clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
linux blk-mq-sched: change ->dispatch_requests() to ->dispatch_request() 2017-01-27 08:20:35 -07:00
math-emu math-emu: fix floating-point to integer overflow detection 2014-01-07 18:36:24 -06:00
media [media] cec: pass parent device in register(), not allocate() 2016-11-29 12:07:17 -02:00
memory ddr: add LPDDR2 data from JESD209-2 2012-05-02 00:04:06 -07:00
misc cxl: Add cxl_check_and_switch_mode() API to switch bi-modal cards 2016-07-14 20:28:11 +10:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-12-27 16:04:37 -08:00
pcmcia pcmcia/ds.h: introduce helper for pcmcia_driver module boilerplate 2013-03-15 12:26:03 -07:00
ras tracing, RAS: Cleanup on __get_str() usage 2016-07-15 15:51:16 -04:00
rdma Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
rxrpc rxrpc: Add tracepoint for ACK proposal 2016-09-23 15:49:19 +01:00
scsi linux: drop __bitwise__ everywhere 2016-12-16 00:13:41 +02:00
soc powerpc updates for 4.10 2016-12-16 09:26:42 -08:00
sound sound updates for 4.10-rc1 2016-12-14 11:14:28 -08:00
target Merge branch 'scsi-target-for-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/bvanassche/linux 2016-12-21 10:16:05 -08:00
trace Merge branch 'stable/for-linus-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb 2017-01-06 10:53:21 -08:00
uapi usb: gadget: f_fs: Document eventfd effect on descriptor format. 2017-01-02 10:55:28 +02:00
video Merge branch 'drm/next/du' of git://linuxtv.org/pinchartl/media into drm-next 2016-11-16 09:39:21 +10:00
xen xen: features and fixes for 4.10 rc0 2016-12-13 16:07:55 -08:00
Kbuild UAPI: remove empty Kbuild files 2013-04-30 17:04:09 -07:00