mirror_zfs/module
Tim Chase b81a3ddc32 Update deadman operation to better align with upstream OpenZFS
The deadman in ZoL didn't behave quite as it did in upstream
OpenZFS.  In addition to the 2 purposes for which OpenZFS used the
zfs_deadman_synctime_ms parameter, ZoL also used it to determine how
frequently the deadman would fire once it has been triggered.

This patch adds the zfs_deadman_checktime_ms parameter to control how
frequently the subsequent checks are performed.

The deadman is now disabled for suspended pools.

As had been the case, unlike upstream OpenZFS, ZoL will not panic when
a hung IO is detected.

The module parameter documentation has been upated to include the new
parameter and to better describe the operation of the deadmen.
    
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Tim Chase <tim@chase2k.com>
Closes #5695
2017-01-31 14:19:08 -08:00
..
avl Fix uninitialized variable in avl_add() 2016-07-25 14:21:34 -07:00
icp codebase style improvements for OpenZFS 6459 port 2017-01-22 13:25:40 -08:00
nvpair Fix spelling 2017-01-03 11:31:18 -06:00
unicode codebase style improvements for OpenZFS 6459 port 2017-01-22 13:25:40 -08:00
zcommon OpenZFS 7386 - zfs get does not work properly with bookmarks 2017-01-26 14:42:15 -08:00
zfs Update deadman operation to better align with upstream OpenZFS 2017-01-31 14:19:08 -08:00
zpios codebase style improvements for OpenZFS 6459 port 2017-01-22 13:25:40 -08:00
.gitignore module/.gitignore: Add *.dwo (#4580) 2016-05-02 09:07:04 -07:00
Makefile.in module/Makefile.in: use relative cp 2017-01-13 15:18:34 -08:00