OpenCloudOS-Kernel/drivers/block
Lars Ellenberg 7753a4c17f drbd: add caching oldest request pointers for replication stages
A request that is to be shipped to the peer goes through a few stages:
- queued
- sent, waiting for ack
- ack received, waiting for "barrier ack", which is re-order epoch being
  closed on the peer by acknowledging a "cache flush" equivalent
  on the lower level device.

In the later two stages, depending on protocol, we may have already
completed this request to the upper layers, so it won't be found anymore
on device->pending_master_completion[] lists.

Track the oldest request yet to be sent (req_next), the oldest not yet
acknowledged (req_ack_pending) and the oldest "still waiting for
something from the peer" (req_not_net_done), doing short list walks on
the transfer log to find the next pending one whenever such a request
makes progress.

Now we have a fast way to look up the oldest requests,
don't do a transfer log walk every time.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2014-07-10 18:35:12 +02:00
..
aoe mm: close PageTail race 2014-03-04 07:55:47 -08:00
drbd drbd: add caching oldest request pointers for replication stages 2014-07-10 18:35:12 +02:00
mtip32xx mtip32xx: minor performance enhancements 2014-06-06 13:28:48 -06:00
paride block: remove struct request buffer member 2014-04-15 14:03:02 -06:00
rsxx block: Convert bio_for_each_segment() to bvec_iter 2013-11-23 22:33:49 -08:00
xen-blkback xen-blkback: defer freeing blkif to avoid blocking xenwatch 2014-05-28 14:17:32 -04:00
zram zram: correct offset usage in zram_bio_discard 2014-06-04 16:54:13 -07:00
DAC960.c DAC960: remove sleep_on usage 2014-03-13 14:56:38 -06:00
DAC960.h
Kconfig zram: promote zram from staging 2014-01-30 16:56:55 -08:00
Makefile zram: promote zram from staging 2014-01-30 16:56:55 -08:00
amiflop.c block: remove struct request buffer member 2014-04-15 14:03:02 -06:00
ataflop.c Merge branch 'for-3.16/core' of git://git.kernel.dk/linux-block into next 2014-06-02 09:29:34 -07:00
brd.c brd: return -ENOSPC rather than -ENOMEM on page allocation failure 2014-06-04 16:54:02 -07:00
cciss.c cciss: Use pci_enable_msix_exact() instead of pci_enable_msix() 2014-04-21 19:02:08 -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
floppy.c Merge branch 'for-jens' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/linux-block into for-linus 2014-06-18 10:30:22 -07:00
hd.c block: remove struct request buffer member 2014-04-15 14:03:02 -06:00
ida_cmd.h
ida_ioctl.h
loop.c Merge branch 'sched/urgent' into sched/core, to avoid conflicts 2014-05-07 13:15:46 +02:00
loop.h move linux/loop.h to drivers/block 2013-06-29 12:46:45 +04:00
mg_disk.c block: remove struct request buffer member 2014-04-15 14:03:02 -06:00
nbd.c nbd: zero from and len fields in NBD_CMD_DISCONNECT. 2014-06-06 16:08:18 -07:00
null_blk.c null_blk: fix softirq completions for queue_mode == 1 2014-06-16 11:40:25 -06:00
nvme-core.c Merge git://git.infradead.org/users/willy/linux-nvme 2014-06-15 15:58:03 -10:00
nvme-scsi.c NVMe: Fix START_STOP_UNIT Scsi->NVMe translation. 2014-06-13 13:11:00 -04:00
osdblk.c block: replace strict_strtoul() with kstrtoul() 2013-09-11 15:56:56 -07:00
pktcdvd.c block: add blk_rq_set_block_pc() 2014-06-06 07:57:37 -06:00
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: handle parent_overlap on writes correctly 2014-06-23 12:55:37 +04:00
rbd_types.h rbd: get rid of RBD_MAX_SEG_NAME_LEN 2012-12-17 08:37:29 -06:00
skd_main.c Merge branch 'for-3.16/core' into for-3.16/drivers 2014-05-28 09:50:26 -06:00
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 block: remove struct request buffer member 2014-04-15 14:03:02 -06:00
swim3.c block: remove struct request buffer member 2014-04-15 14:03:02 -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 block: virtio-blk: support multi virt queues per virtio-blk device 2014-07-01 10:51:03 -06:00
xen-blkfront.c Merge branch 'stable/for-jens-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip into for-3.16/drivers 2014-05-28 12:37:04 -06:00
xsysace.c block: remove struct request buffer member 2014-04-15 14:03:02 -06:00
z2ram.c block: remove struct request buffer member 2014-04-15 14:03:02 -06:00