Todo

component	task	complexity	potential/willing assignee	comments
crtools	Restore tasks into fresh new pid namespace	easy	-	A thing to worry about is this new namespace's init task.
crtools	Rollback tree state	medium	-
crtools	AIO with pending events	medium	-
crtools	restore mountpoints	hard	-	-
crtools	lazy migration using userfaultd	medium	xemul	-
crtools	dump tasks from cgroup	easy	-	Currently criu dumps a subtree from given pid
crtools	speed up logging	medium	Cyrill	Synchronous formatting and writes to log files slow things down (Logging)
crtools	sanitize logging messages	hard	-	Currently log messages are placed w/o any logic. Need to improve that ... somehow.
crtools	support OFD posix locks	easy	-
crtools	optimize kcmp calls	medium	-	For fs/fdt/vm/etc we can pre-generate ID based on objects that live on them. If pre-ID matches, then call kcmp.
crtools	Shmem changes tracking	medium	-
crtools	Page transfer filters	medium	Ruslan Kuprieiev	Packing or encrypting the data would be nice. Maybe it's purely for P.Haul?
crtools	FUSE	hard	-
crtools	32-bit tasks	hard	Cyrill
crtools	Support one of MPI implementations	hard	Adrian Reber	worth starting with OpenMPI
crtools	Generate task's core file out of images	medium	-	CRIT
crtools	Convert images to JSON and back	easy	-	CRIT
crtools	Modify restored resources run-time	medium	-	CRIT Need (probably) some way to alter what is being restored. Usage example -- change the IP address of sockets from task above.
crtools	TCP socket migration with changed IP	medium	-	CRIT it might make sense to migrate a tcp connection on a box with changed IP address _if_ both boxes are NAT-ed to the destination. We will then have to go to NAT box and fix the conntracks, but this might make sense.
crtools	Applying images	hard	xemul@ w/ students	Think about ability to take images and apply them to a living task(s). E.g. -- repopulate fdtable according to data from image. Another use-case -- when doing partial migration we'll need to modify one part to switch from pipes to sockets
crtools	Partial migration	hard	-	migrate some tasks while proxying IPC to existing others (pipes->sockets, etc.)
crtools	Shared objects (mm/fs) support	medium	-	Now we have the kcmp syscall and can do it. The first candidate is mm sharing, as we do know, that MySQL does so sometimes.
crtools	Smart paths resolution	hard	-	Need a way to resolve paths to overmounted files. There are two ways: 1. Move mounts, that overlap the desired path temprarily. 2. When creating a new mount pre-open an fd keeping the mountpoint. Later, do accurate path resolve and call openat() on proper mountpoint fd
kernel/crtools	TCP repair fixes	hard	-	TCP repair TODO
crtools	Bridges in container	medium	-
crtools	VLANs in containers	medium	-
crtools	PPP support	medium	-
crtools/kernel	DelayFS for NFS/Fuse migration	hard	-
kernel	Seamless kernel upgrade	hard	xemul
crtools/kernel	NFS	hard	-	Probably depends on DelayFS
crtools	Validate .img files	easy	-	CRIT For a given set of image files check, that they are in "restorable" shape
crtools	Restore a process tree	hard	-	Need to restore any process tree, which could be created with help PR_SET_CHILD_SUBREAPER and CLONE_PARENT. Processes can share other resources clone(2). Look at session02
crtools	X app	hard	-	Dump/restore of graphical applications
crtools/kernel	Undo semaphores	medium	Cyrill Gorcunov	Require mods from both sides -- criu and kernel
crtools	More detailed RPC fail codes	easy	-	Currently only 3 typical errors are reported(see include/cr-errno.h)
kernel/criu	fsnotify queues	hard	-	Fsnotify