[CRIU] [PATCH]v2 deduplication: bunch neighbour data to punch together

[Pavel Emelyanov]

On 03/07/2014 01:01 PM, Tikhomirov Pavel wrote:
> when decide that data is no longer needed, there are two cases:
> -if data neighbours previous block of "no needed" data, extend bunch
> block(it holds begining and size of concequent "no needed" data) by
> length of curent block and go next.
> -if data not neighbours bunch block(or bunch block size will be bigger
> than MAX_BUNCH_SIZE), than we punch bunch block and set bunch block
> to curent block.
> 
> in the end make cleanup to punch last bunch block.
> 
> changes in v1:
> punch_hole takes whole page_read
> make restriction more precise
> 
> Signed-off-by: Tikhomirov Pavel <snorcht at gmail.com>

applied