Subject: Re: Adding B_WRITETHRU -- file system question
To: Jason R Thorpe <>
From: Manuel Bouyer <>
List: tech-kern
Date: 12/04/2001 21:02:29
On Tue, Dec 04, 2001 at 11:55:49AM -0800, Jason R Thorpe wrote:
> On Tue, Dec 04, 2001 at 08:47:47PM +0100, Manuel Bouyer wrote:
>  > BTW, is B_ORDERED really used ? I see it's set in bowrite() but I can't
>  > find what uses bowrite.
> No, it's not currently used.  Having had a discussion about it with
> several people, I think B_ORDERED will probably go away.

OK, I think I know who is one of these peoples :)

>  > Hum, I'm not sure how to enforce this for IDE. I guess we should just disable
>  > the write cache for IDE disks.
> I think this should be a user policy decision; if they want to play
> fast-and-loose, they can, or they can disable the write cache on their
> disks.  The idea behind my changes is that you can be safe if playing
> fast-and-loose on disks that can provide that safety.

Yes, of course.

Manuel Bouyer <>