[dm-devel] [PATCH 0/3]: region based notifications for dm-io

["Stefan Bader" <Stefan Bader de ibm com>]

The following patches (based on kernel 2.6.22-rc2) will modify the
dm-io library to allow targets to get notified whenever requests to
one of the target regions changes its state. Currently this would only
be I/O completion but might include time-out notification in future.
The current implementation only handles notification events per
requests, which isn't sufficiently fine-grained for targets that want
to act sooner on I/O completion of single regions.   One intended
target will be a mirror that can go temporarily out-of-sync if one of
the mirror halves takes too much time to respond.

Regards,
Stefan Bader