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Alexander Motin 70ea484e3e
Finally drop long disabled vdev cache. 
It was a vdev level read cache, designed to aggregate many small
reads by speculatively issuing bigger reads instead and caching
the result.  But since it has almost no idea about what is going
on with exception of ZIO_FLAG_DONT_CACHE flag set by higher layers,
it was found to make more harm than good, for which reason it was
disabled for the past 12 years.  These days we have much better
instruments to enlarge the I/Os, such as speculative and prescient
prefetches, I/O scheduler, I/O aggregation etc.

Besides just the dead code removal this removes one extra mutex
lock/unlock per write inside vdev_cache_write(), not otherwise
disabled and trying to do some work.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
Closes #14953
 		2023-06-09 12:40:55 -07:00
..
.gitignore Ignore *.o.ur-safe build artifacts 2018-05-13 18:59:02 -07:00
fsck.zfs.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
mount.zfs.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_id.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zdb.8 zdb: add -B option to generate backup stream 2023-06-05 11:54:42 -07:00
zed.8.in Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zfs-allow.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zfs-bookmark.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs-change-key.8 Reorganize zfs(8) man page into sections 2019-11-12 11:17:40 -08:00
zfs-clone.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs-create.8 zfs-create(8): ZFS for swap: caution, clarity 2023-06-02 11:25:13 -07:00
zfs-destroy.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs-diff.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs-get.8 Reorganize zfs(8) man page into sections 2019-11-12 11:17:40 -08:00
zfs-groupspace.8 Reorganize zfs(8) man page into sections 2019-11-12 11:17:40 -08:00
zfs-hold.8 Adds the `-p` option to `zfs holds` 2022-11-08 10:08:21 -08:00
zfs-inherit.8 Reorganize zfs(8) man page into sections 2019-11-12 11:17:40 -08:00
zfs-jail.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zfs-list.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs-load-key.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zfs-mount-generator.8.in Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zfs-mount.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zfs-program.8 Add zfs.sync.snapshot_rename 2022-09-02 13:31:19 -07:00
zfs-project.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zfs-projectspace.8 Reorganize zfs(8) man page into sections 2019-11-12 11:17:40 -08:00
zfs-promote.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zfs-receive.8 Improve tests and update man page for healing recv 2023-03-15 10:34:10 -07:00
zfs-recv.8 Reorganize zfs(8) man page into sections 2019-11-12 11:17:40 -08:00
zfs-redact.8 Reorganize zfs(8) man page into sections 2019-11-12 11:17:40 -08:00
zfs-release.8 Reorganize zfs(8) man page into sections 2019-11-12 11:17:40 -08:00
zfs-rename.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs-rollback.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs-send.8 Use setproctitle to report progress of zfs send 2023-01-17 10:17:35 -08:00
zfs-set.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs-share.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs-snapshot.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs-unallow.8 Reorganize zfs(8) man page into sections 2019-11-12 11:17:40 -08:00
zfs-unjail.8 Add FreeBSD jail support hooks 2019-12-11 11:58:37 -08:00
zfs-unload-key.8 Reorganize zfs(8) man page into sections 2019-11-12 11:17:40 -08:00
zfs-unmount.8 Reorganize zfs(8) man page into sections 2019-11-12 11:17:40 -08:00
zfs-unzone.8 Add Linux namespace delegation support 2022-06-10 09:51:46 -07:00
zfs-upgrade.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs-userspace.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zfs-wait.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs-zone.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs.8 Add colored output to zfs list 2023-03-24 10:24:11 -07:00
zfs_ids_to_path.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zgenhostid.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zinject.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zpool-add.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-attach.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-checkpoint.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-clear.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-create.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zpool-destroy.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-detach.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-events.8 Finally drop long disabled vdev cache. 2023-06-09 12:40:55 -07:00
zpool-export.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zpool-get.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-history.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-import.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-initialize.8 Add the ability to uninitialize 2023-05-18 10:02:20 -07:00
zpool-iostat.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zpool-labelclear.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-list.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-offline.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-online.8 Reorganize zpool(8) man page into sections 2019-11-13 09:21:07 -08:00
zpool-reguid.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-remove.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zpool-reopen.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-replace.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-resilver.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zpool-scrub.8 Teach zpool scrub to scrub only blocks in error log 2023-05-18 11:59:42 -07:00
zpool-set.8 Reorganize zpool(8) man page into sections 2019-11-13 09:21:07 -08:00
zpool-split.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zpool-status.8 Enable the head_errlog feature to remove errors 2023-05-09 08:53:27 -07:00
zpool-sync.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-trim.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool-upgrade.8 Ubuntu 22.04 integration: mancheck 2022-11-18 11:26:41 -08:00
zpool-wait.8 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zpool.8 Colorize zpool iostat output 2023-03-24 10:23:52 -07:00
zpool_influxdb.8 Consistentify miscellaneous style on remaining manpages 2021-06-09 14:35:53 -07:00
zstream.8 Add ability to recompress send streams with new compression algorithm 2022-11-10 15:23:46 -08:00
zstreamdump.8 zstreamdump: replace with link to zstream 2021-05-21 10:16:14 -07:00