git: ips - Issue IPS_CACHE_FLUSH_CMD to the controller on BUF_CMD_FLUSH

[YONETANI Tomokazu <y0netan1@xxxxxxxxxxxxxxxxxxxxxxx>]

commit ac8b35f8e5dea753a3e43f8183dc547946cc6fc9
Author: YONETANI Tomokazu <y0netan1@dragonflybsd.org>
Date:   Wed Sep 15 14:07:56 2010 +0900

    ips - Issue IPS_CACHE_FLUSH_CMD to the controller on BUF_CMD_FLUSH
    
    Previously, BUF_CMD_FLUSH ended up as a zero-byte write command, which
    always fails, flooding the console with `iobuf error 5'.  Filesystems
    other than HAMMER almost never issues this command, so we've never
    seen the error message in pre-HAMMER days.  This commit adds a new path
    for BUF_CMD_FLUSH and issue IPS_CACHE_FLUSH_CMD for it.
    
    Also mention the tunable/sysctl knob debug.ips.ignore_flush_cmd in ips(4)
    man page in case the new behavior confuses your controller; when set, the
    driver just discards BUF_CMD_FLUSH.

Summary of changes:
 share/man/man4/ips.4            |   12 +++++++
 sys/dev/raid/ips/ips_commands.c |   63 ++++++++++++++++++++++++++++++++++++++-
 2 files changed, 74 insertions(+), 1 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/ac8b35f8e5dea753a3e43f8183dc547946cc6fc9


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