MFC of r225830 (hastd activemap cache flush)

[Thomas Steen Rasmussen]

Hello pjd@ and list,

I think the MFC of this change was forgotten:
http://svnweb.freebsd.org/base?view=revision&revision=225830

Any chance it can be committed to 9 ? Thanks!

Best regards

Thomas Steen Rasmussen

ps. for the archives, I am trying to get rid of noise like this every
five seconds:
Jan  5 19:01:12 hostA hastd[60080]: [hasthd7] (primary) Local request
failed (Operation not supported by device): FLUSH.
Jan  5 19:01:12 hostA hastd[60080]: [hasthd7] (primary) Remote request
failed (Operation not supported by device): FLUSH.
This is from the primary, similar messages are logged on the secondary.