[dm-devel] [PATCH UPDATED 4/5] dm: implement REQ_FLUSH/FUA support for request-based dm

[Mike Snitzer]

On Wed, Sep 01 2010 at  8:42am -0400,
Tejun Heo <tj at kernel.org> wrote:

> Hello,
> 
> On 09/01/2010 02:12 PM, Mikulas Patocka wrote:
> > That may be true for request-based dm (I don't know).
> 
> Oh, okay, this part of thread was for request based dm, so I assumed
> you were talking about it.
> 
> > But bio-based dm doesn't depend on it, I wrote it and I didn't rely on 
> > that.
> 
> If you look at the two patches for bio-based ones.  The first one is
> basically what you're talking about w/ s/barrier/flush/ renames and
> dropping of -EOPNOTSUPP.  It doesn't really change the mechanism much.
> If you don't feel comfortable about the second one, we sure can
> postpone it but it's still quite away from the next merge window and
> what would be the point of delaying it?

Right, we have a window of opportunity to sort this out now.  No sense
in wasting it.

Mike