[dm-devel] [PATCH v3] staging: writeboost: Add dm-writeboost

[Joe Thornber]

On Sat, Feb 21, 2015 at 01:06:08AM +0900, Akira Hayakawa wrote:
> The size is configurable but typically 512KB (that's the default).
> 
> Refer to bio payload sounds really dangerous but it may be possible
> in some tricky way. but at the moment I am not sure how the
> implementation would be.
> 
> Is there some fancy function that is like memcpy but actually "move"
> the ownership?

When building up your log chunk bio copy the bio_vecs (not the data)
from the original bios.  You can't complete the original bios until
your log chunk has been written.

- Joe