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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@gmail.com> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
criu ==== An utility to checkpoint/restore tasks. Using this tool, you can freeze a running application (or part of it) and checkpoint it to a hard drive as a collection of files. You can then use the files to restore and run the application from the point it was frozen at. The distinctive feature of the CRIU project is that it is mainly implemented in user space. The project home is at http://criu.org Pages worth starting with are * Kernel configuration, compilation, etc: http://criu.org/Installation * A simple example of usage: http://criu.org/Simple_loop * More sophisticated example with graphical app: http://criu.org/VNC