[Drbd-dev] [PATCH v5 12/12] block: Only clone bio vecs that are in use

[Tejun Heo]

Hello,

On Mon, Aug 06, 2012 at 03:08:41PM -0700, Kent Overstreet wrote:
> bcache creates large bios internally, and then splits them according to
> the device requirements before it sends them down. If a lower level
> device tries to clone the bio, and the original bio had more than
> BIO_MAX_PAGES, the clone will fail unecessarily.
> 
> We can fix this by only cloning the bio vecs that are actually in use.

How was this tested?

Thanks.

-- 
tejun