CVS commit: src/sys/dev/dm

["Tomohiro Kusumi" <tkusumi%netbsd.org@localhost>]

Module Name:    src
Committed By:   tkusumi
Date:           Sun Jan  5 08:08:26 UTC 2020

Modified Files:
        src/sys/dev/dm: dm.h dm_target.c
Added Files:
        src/sys/dev/dm: dm_target_delay.c

Log Message:
dm: Add dm-delay target

Ported from DragonFlyBSD, but this target had originally existed in
Linux kernel. See below for details.
https://www.kernel.org/doc/Documentation/device-mapper/delay.txt

Due to "tick" in hz(9) not working (which results in dmdlthread spinning
forever in _submit_queue() without dp extracted from delayed list
and queued into submit list), this hasn't been hooked to dm.kmod yet.

taken-from: DragonFlyBSD


To generate a diff of this commit:
cvs rdiff -u -r1.53 -r1.54 src/sys/dev/dm/dm.h
cvs rdiff -u -r1.38 -r1.39 src/sys/dev/dm/dm_target.c
cvs rdiff -u -r0 -r1.1 src/sys/dev/dm/dm_target_delay.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.