CVSROOT:        /cvs
Module name:    src
Changes by:     kette...@cvs.openbsd.org        2010/06/29 12:52:20

Modified files:
        sys/kern       : kern_bufq.c vfs_bio.c 
        sys/sys        : buf.h 

Log message:
Introduce bufq_quiesce(), which will block I/O ifrom getting on the queues,
and waits until all I/O currently on the queues has been completed.  To get
I/O going again, call bufq_restart().

To be used for suspend/resume.

Joint effort with thib@, tedu@; tested by mlarkin@, marco@

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