On Mon, Dec 09, 2002 at 07:02:21PM -0500, Thor Lancelot Simon wrote:

 > What we _should_ do, since we do write B_SYNC data with ordered tags (and

We do?

 > Empirical evidence suggests that it may be a good idea, when running with
 > that policy, to send an ordered tag every N commands just to guarantee
 > that commands don't linger in the cache _forever_, never completing at
 > all because it's not convenient to move the head over there.  But that
 > should not be so hard to arrange either.

Right, FreeBSD does this, for example.

-- 
        -- Jason R. Thorpe <thorpej@wasabisystems.com>