kern/176744: [geom] [patch] BIO_FLUSH not recorded by devstats

[brueffer at FreeBSD.org]

Synopsis: [geom] [patch] BIO_FLUSH not recorded by devstats

State-Changed-From-To: open->feedback
State-Changed-By: brueffer
State-Changed-When: Wed Feb 5 18:11:49 CET 2014
State-Changed-Why: 
Hi Matt, I debated this change with mav@ and we were wondering what your specific
use for this change is.

While an adapted version (https://people.freebsd.org/~brueffer/geom_devstat.diff)
of this patch works, the upstream userland tools have no special handling for BIO_FLUSH
events.  They end up in the _OTHER categories of libdevstat(3), which e.g. gstat does not
show at all.

Could you elaborate?

http://www.freebsd.org/cgi/query-pr.cgi?pr=176744