All of lore.kernel.org
 help / color / mirror / Atom feed
* [PATCH 00/11] mirror: cancel nbd reconnect
@ 2020-11-18 18:04 Vladimir Sementsov-Ogievskiy
  2020-11-18 18:04 ` [PATCH 01/11] block: add new BlockDriver handler: bdrv_cancel_in_flight Vladimir Sementsov-Ogievskiy
                   ` (13 more replies)
  0 siblings, 14 replies; 36+ messages in thread
From: Vladimir Sementsov-Ogievskiy @ 2020-11-18 18:04 UTC (permalink / raw)
  To: qemu-block
  Cc: qemu-devel, eblake, fam, stefanha, mreitz, kwolf, jsnow, vsementsov, den

Hi all!

The problem

Assume we have mirror job with nbd target node with enabled reconnect.
Connection failed. So, all current requests to nbd node are waiting for
nbd driver to reconnect. And they will wait for reconnect-delay time
specified in nbd blockdev options. This timeout may be long enough, for
example, we in Virtuozzo use 300 seconds by default.

So, if at this moment user tries to cancel the job, job will wait for
its in-flight requests to finish up to 300 seconds. From the user point
of view, cancelling the job takes a long time. Bad.

Solution

Let's just cancel "waiting for reconnect in in-flight request coroutines"
on mirror (and backup) cancel. Welcome the series below.

Vladimir Sementsov-Ogievskiy (11):
  block: add new BlockDriver handler: bdrv_cancel_in_flight
  block/nbd: implement .bdrv_cancel_in_flight
  block/raw-format: implement .bdrv_cancel_in_flight handler
  job: add .cancel handler for the driver
  block/mirror: implement .cancel job handler
  iotests/264: fix style
  iotests/264: move to python unittest
  iotests.py: qemu_nbd_popen: remove pid file after use
  iotests/264: add mirror-cancel test-case
  block/backup: implement .cancel job handler
  iotests/264: add backup-cancel test-case

 include/block/block.h         |   3 +
 include/block/block_int.h     |   9 +++
 include/qemu/job.h            |   5 ++
 block/backup.c                |  10 +++
 block/io.c                    |  11 +++
 block/mirror.c                |   9 +++
 block/nbd.c                   |  15 ++++
 block/raw-format.c            |   6 ++
 job.c                         |   3 +
 tests/qemu-iotests/264        | 143 ++++++++++++++++++++++------------
 tests/qemu-iotests/264.out    |  20 ++---
 tests/qemu-iotests/iotests.py |   6 +-
 12 files changed, 173 insertions(+), 67 deletions(-)

-- 
2.21.3



^ permalink raw reply	[flat|nested] 36+ messages in thread

end of thread, other threads:[~2021-01-21 19:52 UTC | newest]

Thread overview: 36+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-11-18 18:04 [PATCH 00/11] mirror: cancel nbd reconnect Vladimir Sementsov-Ogievskiy
2020-11-18 18:04 ` [PATCH 01/11] block: add new BlockDriver handler: bdrv_cancel_in_flight Vladimir Sementsov-Ogievskiy
2021-01-20 22:27   ` Eric Blake
2021-01-21 18:50     ` Vladimir Sementsov-Ogievskiy
2020-11-18 18:04 ` [PATCH 02/11] block/nbd: implement .bdrv_cancel_in_flight Vladimir Sementsov-Ogievskiy
2021-01-20 23:13   ` Eric Blake
2020-11-18 18:04 ` [PATCH 03/11] block/raw-format: implement .bdrv_cancel_in_flight handler Vladimir Sementsov-Ogievskiy
2021-01-20 23:15   ` Eric Blake
2021-01-21 19:08     ` Vladimir Sementsov-Ogievskiy
2020-11-18 18:04 ` [PATCH 04/11] job: add .cancel handler for the driver Vladimir Sementsov-Ogievskiy
2021-01-20 23:17   ` Eric Blake
2021-01-21  9:32     ` Vladimir Sementsov-Ogievskiy
2020-11-18 18:04 ` [PATCH 05/11] block/mirror: implement .cancel job handler Vladimir Sementsov-Ogievskiy
2021-01-21  1:05   ` Eric Blake
2020-11-18 18:04 ` [PATCH 06/11] iotests/264: fix style Vladimir Sementsov-Ogievskiy
2021-01-21  1:13   ` Eric Blake
2020-11-18 18:04 ` [PATCH 07/11] iotests/264: move to python unittest Vladimir Sementsov-Ogievskiy
2021-01-21  1:17   ` Eric Blake
2021-01-21 19:29     ` Vladimir Sementsov-Ogievskiy
2020-11-18 18:04 ` [PATCH 08/11] iotests.py: qemu_nbd_popen: remove pid file after use Vladimir Sementsov-Ogievskiy
2021-01-21  1:19   ` Eric Blake
2020-11-18 18:04 ` [PATCH 09/11] iotests/264: add mirror-cancel test-case Vladimir Sementsov-Ogievskiy
2021-01-21  1:26   ` Eric Blake
2021-01-21 19:42     ` Vladimir Sementsov-Ogievskiy
2020-11-18 18:04 ` [PATCH 10/11] block/backup: implement .cancel job handler Vladimir Sementsov-Ogievskiy
2021-01-21  1:27   ` Eric Blake
2020-11-18 18:04 ` [PATCH 11/11] iotests/264: add backup-cancel test-case Vladimir Sementsov-Ogievskiy
2021-01-21  1:28   ` Eric Blake
2021-01-21  2:21     ` Eric Blake
2021-01-21 19:43       ` Vladimir Sementsov-Ogievskiy
2020-11-18 18:19 ` [PATCH 00/11] mirror: cancel nbd reconnect Eric Blake
2020-11-18 18:36   ` Vladimir Sementsov-Ogievskiy
2020-12-18 11:05 ` Vladimir Sementsov-Ogievskiy
2021-01-09 10:11   ` Vladimir Sementsov-Ogievskiy
2021-01-21  2:14 ` Eric Blake
2021-01-21 19:44   ` Vladimir Sementsov-Ogievskiy

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.