Andriy Gapon 90354c3200 MFV r323107: 8414 Implemented zpool scrub pause/resume ... illumos/illumos-gate@1702cce751 1702cce751 FreeBSD note: rather than merging the zpool.8 update I copied the zpool scrub section from the illumos zpool.1m to FreeBSD zpool.8 almost verbatim. Now that the illumos page uses the mdoc format, it was an easier option. Perhaps the change is not in perfect compliance with the FreeBSD style, but I think that it is acceptible. 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. 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. 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> MFC after: 2 weeks		2017-09-09 11:00:07 +00:00
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compat/opensolaris	Honor all options of "zfs mount -o"	2017-09-05 19:28:35 +00:00
contrib/opensolaris	MFV r323107: 8414 Implemented zpool scrub pause/resume	2017-09-09 11:00:07 +00:00
lib	Add D definitions for the named values in socket.h	2017-09-07 03:05:16 +00:00
sbin	Convert traditional ${MK_TESTS} conditional idiom for including test	2017-08-02 08:35:51 +00:00
tests	Merge ^/user/ngie/release-pkg-fix-tests to unbreak how test files are installed	2016-05-04 23:20:53 +00:00
usr.bin	Convert traditional ${MK_TESTS} conditional idiom for including test	2017-08-02 08:35:51 +00:00
usr.sbin	zfsd(8): Close a race condition when onlining a disk paritition	2017-08-24 19:48:41 +00:00
Makefile	Convert traditional ${MK_TESTS} conditional idiom for including test	2017-08-02 08:35:51 +00:00
Makefile.inc