redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity
alistair23-linux/drivers/block
History
Sam Bradshaw b4e75cbf13 NVMe: Adhere to request queue block accounting enable/disable 
Recently, a new sysfs control "iostats" was added to selectively
enable or disable io statistics collection for request queues.  This
patch hooks that control.

IO statistics collection is rather expensive on large, multi-node
machines with drives pushing millions of iops.  Having the ability to
disable collection if not needed can improve throughput significantly.

As a data point, on a quad E5-4640, I see more than 50% throughput
improvement when io statistics accounting is disabled during heavily
multi-threaded small block random read benchmarks where device
performance is in the million iops+ range.

Signed-off-by: Sam Bradshaw <sbradshaw@micron.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
2014-06-03 22:58:54 -04:00
..
aoe mm: close PageTail race 2014-03-04 07:55:47 -08:00
drbd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-04-12 14:49:50 -07:00
mtip32xx Merge branch 'for-3.15/drivers' of git://git.kernel.dk/linux-block 2014-04-01 19:43:53 -07:00
paride drivers/block/paride/pg.c: underflow bug in pg_write() 2014-01-21 20:16:56 -08:00
rsxx block: Convert bio_for_each_segment() to bvec_iter 2013-11-23 22:33:49 -08:00
xen-blkback xen-blkback: init persistent_purge_work work_struct 2014-02-11 20:34:03 -07:00
zram zram: support REQ_DISCARD 2014-04-07 16:36:02 -07:00
amiflop.c tree-wide: use reinit_completion instead of INIT_COMPLETION 2013-11-15 09:32:21 +09:00
ataflop.c ataflop: fix sleep_on races 2014-03-13 14:56:38 -06:00
brd.c block: Convert bio_for_each_segment() to bvec_iter 2013-11-23 22:33:49 -08:00
cciss.c cciss: Fallback to MSI rather than to INTx if MSI-X failed 2014-03-13 14:56:39 -06:00
cciss.h cciss: Adds simple mode functionality 2011-08-08 11:40:15 +02:00
cciss_cmd.h cciss: use new doorbell-bit-5 reset method 2011-05-06 08:23:55 -06:00
cciss_scsi.c cciss: switch to ->show_info() 2013-04-09 14:13:19 -04:00
cciss_scsi.h cciss: add cciss_tape_cmds module paramter 2011-05-06 08:23:59 -06:00
cpqarray.c cpqarray: fix info leak in ida_locked_ioctl() 2013-09-24 17:00:26 -07:00
cpqarray.h
cryptoloop.c move linux/loop.h to drivers/block 2013-06-29 12:46:45 +04:00
DAC960.c DAC960: remove sleep_on usage 2014-03-13 14:56:38 -06:00
DAC960.h
floppy.c floppy: don't use PREPARE_[DELAYED_]WORK 2014-03-07 10:24:48 -05:00
hd.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
ida_cmd.h
ida_ioctl.h
Kconfig zram: promote zram from staging 2014-01-30 16:56:55 -08:00
loop.c drivers/block/loop.c: ratelimit error messages 2014-04-08 14:44:35 -06:00
loop.h move linux/loop.h to drivers/block 2013-06-29 12:46:45 +04:00
Makefile zram: promote zram from staging 2014-01-30 16:56:55 -08:00
mg_disk.c mg_disk: Spelling s/finised/finished/ 2014-01-21 20:34:58 -08:00
nbd.c switch nbd to sockfd_lookup/sockfd_put 2014-04-01 23:19:10 -04:00
null_blk.c null_blk: use blk_complete_request and blk_mq_complete_request 2014-02-10 09:27:31 -07:00
nvme-core.c NVMe: Adhere to request queue block accounting enable/disable 2014-06-03 22:58:54 -04:00
nvme-scsi.c NVMe: Delete NVME_GET_FEAT_TEMP_THRESH 2014-06-03 22:58:27 -04:00
osdblk.c block: replace strict_strtoul() with kstrtoul() 2013-09-11 15:56:56 -07:00
pktcdvd.c pktcdvd: fix error return code 2014-01-03 10:05:34 +01:00
ps3disk.c block: Kill bio_segments()/bi_vcnt usage 2013-11-23 22:33:51 -08:00
ps3vram.c block: Convert bio_for_each_segment() to bvec_iter 2013-11-23 22:33:49 -08:00
rbd.c rbd: prefix rbd writes with CEPH_OSD_OP_SETALLOCHINT osd op 2014-04-03 10:33:52 +08:00
rbd_types.h rbd: get rid of RBD_MAX_SEG_NAME_LEN 2012-12-17 08:37:29 -06:00
skd_main.c skd: Use pci_enable_msix_range() instead of pci_enable_msix() 2014-02-21 15:45:26 -08:00
skd_s1120.h skd: fix formatting in skd_s1120.h 2013-11-08 09:10:30 -07:00
smart1,2.h fix typos 'comamnd' -> 'command' in comments 2011-02-02 11:31:21 +01:00
sunvdc.c sunvdc: Fix off-by-one in generic_request(). 2013-02-14 11:49:01 -08:00
swim.c drivers/block/swim.c: remove unnecessary platform_set_drvdata() 2013-09-11 15:56:59 -07:00
swim3.c swim3: fix interruptible_sleep_on race 2014-03-13 14:56:38 -06:00
swim_asm.S
sx8.c drivers/block/sx8.c: remove unnecessary pci_set_drvdata() 2014-01-21 20:16:56 -08:00
umem.c block: Convert drivers to immutable biovecs 2013-11-23 22:33:51 -08:00
umem.h
virtio_blk.c Nothing exciting: virtio-blk users might see a bit of a boost from the 2014-04-02 14:43:17 -07:00
xen-blkfront.c Merge branch 'stable/for-jens-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip into for-linus 2014-02-10 12:52:34 -07:00
xsysace.c xilinx systemace: Fix sparse warnings 2013-07-10 07:47:12 +02:00
z2ram.c block/z2ram: Remove duplicate external declarations 2013-11-26 11:09:10 +01:00