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
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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