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Andriy Gapon efd3d79ea3 8414 Implemented zpool scrub pause/resume 
illumos/illumos-gate@1702cce751
1702cce751

https://www.illumos.org/issues/8414
  This issue tracks the port of scrub pause from ZoL: https://github.com/zfsonlinux/zfs/pull/6167
  Currently, there is no way to pause a scrub. Pausing may be useful when
 the pool is busy with other I/O to preserve bandwidth.

  Description

  This patch adds the ability to pause and resume scrubbing.  This is achieved
  by maintaining a persistent on-disk scrub state.  While the state is 'paused'
  we do not scrub any more blocks.  We do however perform regular scan
  housekeeping such as freeing async destroyed and deadlist blocks while paused.

  If you're testing this change, you probably want to include the patch from #6164

  Motivation and Context

  Scrub pausing can be an I/O intensive operation and people have been asking
  for the ability to pause a scrub for a while. This allows one to preserve scrub
  progress while freeing up bandwidth for other I/O.

  How Has This Been Tested?

  Unit testing and zfs-tests.  to the pool.  This patch will also include the
  patch from https://github.com/zfsonlinux/zfs/ pull/6164 In certain cases
  (dsl_scan_sync() is one), we may end up calling

Reviewed by: George Melikov <mail@gmelikov.ru>
Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Brad Lewis <brad.lewis@delphix.com>
Reviewed by: Serapheim Dimitropoulos <serapheim@delphix.com>
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Approved by: Dan McDonald <danmcd@joyent.com>
Author: Alek Pinchuk <apinchuk@datto.com>
2017-09-01 17:43:08 +00:00
..
dtrace fix up r319744, add new files 2017-06-09 15:06:50 +00:00
lockstat Import the lockstat(1) sources from OpenSolaris as of 20080410. 2009-06-18 17:25:38 +00:00
mdb/tools/common Vendor import of the full userland contrib part of DTrace support from 2008-04-26 00:54:52 +00:00
plockstat Import plockstat from OpenSolaris r12768. 2010-07-19 14:57:01 +00:00
pyzfs Update vendor/opensolaris to last OpenSolaris state (13149:b23a4dab3d50) 2012-07-18 07:48:04 +00:00
sgs Update vendor/opensolaris to last OpenSolaris state (13149:b23a4dab3d50) 2012-07-18 07:48:04 +00:00
stat/common Update vendor/illumos/dist and vendor-sys/illumos/dist 2013-02-11 08:07:56 +00:00
zdb 8067 zdb should be able to dump literal embedded block pointer 2017-08-08 11:10:37 +00:00
zfs 7955 libshare needs to initialize only those datasets being modified by the consumer 2017-04-14 18:34:03 +00:00
zhack 6314 buffer overflow in dsl_dataset_name 2016-07-12 12:01:54 +00:00
zinject 6531 Provide mechanism to artificially limit disk performance 2016-03-08 16:11:59 +00:00
zlook Update vendor/opensolaris to last OpenSolaris state (13149:b23a4dab3d50) 2012-07-18 07:48:04 +00:00
zpool 8414 Implemented zpool scrub pause/resume 2017-09-01 17:43:08 +00:00
zstreamdump 7252 7628 compressed zfs send / receive 2017-04-14 18:07:43 +00:00
ztest 8378 crash due to bp in-memory modification of nopwrite block 2017-08-08 10:44:48 +00:00