[dm-devel] Re: dm: bind new table before destroying old

[Alasdair G Kergon]

On Wed, Nov 11, 2009 at 03:56:05PM +0900, Kiyoshi Ueda wrote:
> I believe dm-mpath needs to flush such workqueues in postsuspend.

Yes - should be an easy change.

> Also, we need something to block message ioctl to suspended device.
 
> As for the message ioctl, I don't have any good idea, but...
>   - Reject message ioctl to suspended device in dm-ioctl

I think the crypt target expects to be able to do this to manipulate
the in-core encryption key.

>   - Targets must not kick any work influencing external themselves
>     in their message ioctl handlers.

So I think we'll need a target-specific approach like that here.

Alasdair