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22d2cfdffa
linux/drivers/block
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Ilya Dryomov 22d2cfdffa libceph: move away from global osd_req_flags 
osd_req_flags is overly general and doesn't suit its only user
(read_from_replica option) well:

- applying osd_req_flags in account_request() affects all OSD
  requests, including linger (i.e. watch and notify).  However,
  linger requests should always go to the primary even though
  some of them are reads (e.g. notify has side effects but it
  is a read because it doesn't result in mutation on the OSDs).

- calls to class methods that are reads are allowed to go to
  the replica, but most such calls issued for "rbd map" and/or
  exclusive lock transitions are requested to be resent to the
  primary via EAGAIN, doubling the latency.

Get rid of global osd_req_flags and set read_from_replica flag
only on specific OSD requests instead.

Fixes: 8ad44d5e0d ("libceph: read_from_replica option")
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
2020-06-16 16:01:53 +02:00
..
aoe bdi: fix up for "remove the name field in struct backing_dev_info" 2020-05-11 09:08:26 -06:00
drbd Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-06-03 16:27:18 -07:00
mtip32xx block: mtip32xx: Spelling s/configration/configuration/ 2019-10-25 14:31:07 -06:00
paride treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
rnbd RDMA/rnbd: Fix compilation error when CONFIG_MODULES is disabled 2020-05-22 15:50:22 -03:00
rsxx rsxx: use bio_{start,end}_io_acct 2020-05-27 05:21:23 -06:00
xen-blkback xen/blkback: Consistently insert one empty line between functions 2020-01-29 07:35:49 -06:00
zram zcomp: Use ARRAY_SIZE() for backends list 2020-06-04 19:06:24 -07:00
amiflop.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
ataflop.c ataflop: Remove unneeded semicolon 2019-11-28 10:40:47 -07:00
brd.c block: simplify queue allocation 2020-03-27 10:23:43 -06:00
cryptoloop.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 30 2019-05-24 17:27:10 +02:00
floppy.c block/floppy: fix contended case in floppy_queue_rq() 2020-05-26 15:23:54 -06:00
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
loop.c block-5.8-2020-06-11 2020-06-11 16:07:33 -07:00
loop.h block/loop: Use global lock for ioctl() operation. 2018-11-08 06:30:11 -07:00
Makefile block/rnbd: include client and server modules into kernel compilation 2020-05-17 18:57:17 -03:00
nbd.c nbd: requeue command if the soecket is changed 2020-03-12 08:01:24 -06:00
null_blk_main.c for-5.8/block-2020-06-01 2020-06-02 15:29:19 -07:00
null_blk_trace.c null_blk: add tracepoint helpers for zoned mode 2020-03-27 13:39:10 -06:00
null_blk_trace.h null_blk: add tracepoint helpers for zoned mode 2020-03-27 13:39:10 -06:00
null_blk_zoned.c for-5.8/block-2020-06-01 2020-06-02 15:29:19 -07:00
null_blk.h null_blk: Cleanup zoned device initialization 2020-04-23 09:35:09 -06:00
pktcdvd.c pktcdvd: remove redundant initialization of variable ret 2020-06-11 09:15:48 -06:00
ps3disk.c ps3disk: use the default segment boundary 2020-05-19 00:10:35 +10:00
ps3vram.c block: simplify queue allocation 2020-03-27 10:23:43 -06:00
rbd_types.h libceph, rbd: replace zero-length array with flexible-array 2020-06-01 13:22:53 +02:00
rbd.c libceph: move away from global osd_req_flags 2020-06-16 16:01:53 +02:00
skd_main.c Linux 5.2-rc6 2019-07-01 08:16:08 -06:00
skd_s1120.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497 2019-06-19 17:09:53 +02:00
sunvdc.c compat_ioctl: block: handle cdrom compat ioctl in non-cdrom drivers 2020-01-03 09:33:15 +01:00
swim3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
swim_asm.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
swim.c block/swim3: use set_current_state macro 2020-05-16 14:28:37 -06:00
sx8.c sx8: use a per-host tag_set 2018-11-09 08:14:14 -07:00
umem.c umem: remove redundant initialization of variable ret 2020-06-11 09:16:17 -06:00
umem.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 348 2019-06-05 17:37:08 +02:00
virtio_blk.c virtio-blk: handle block_device_operations callbacks after hot unplug 2020-05-02 10:28:13 -04:00
xen-blkfront.c xen: branch for v5.7-rc1b 2020-04-10 17:20:06 -07:00
xsysace.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
z2ram.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00