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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ctf	Vendor import (really!) of the OpenSolaris bits for DTrace.	2008-05-22 07:00:07 +00:00
dtrace	7035 string-related subroutines should validate input earlier	2016-06-06 22:09:22 +00:00
fs	8414 Implemented zpool scrub pause/resume	2017-09-01 17:43:08 +00:00
os	5045 use atomic_{inc,dec}_* instead of atomic_add_*	2014-08-20 06:22:59 +00:00
sys	8414 Implemented zpool scrub pause/resume	2017-09-01 17:43:08 +00:00
zmod	Update vendor-sys/opensolaris to last OpenSolaris state (13149:b23a4dab3d50)	2012-07-18 08:12:04 +00:00
Makefile.files	6396 remove SVM	2017-06-09 14:55:12 +00:00