Subject: Re: wd, disk write cache, sync cache, and softdep.
To: Eric Haszlakiewicz <>
From: Manuel Bouyer <>
List: tech-kern
Date: 12/17/2004 22:00:44
On Fri, Dec 17, 2004 at 02:45:04PM -0600, Eric Haszlakiewicz wrote:
> > and A2 before A3. But you can still have A2, A1, A3.
> 	So wouldn't that also cause anything else in the drive's cache to
> be written out?  (e.g. a B1 sent between A1 and A2) That sounds a lot like a
> cache flush.

No anything else. With tagged queuing you can have other commands queued after
A3, these ones won't be flushed to cache.

Manuel Bouyer <>
     NetBSD: 26 ans d'experience feront toujours la difference