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	Ruslan Kuprieiev	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(Maybe worth switching to Wayland?)
crtools	Wayland app	hard	-	Dump/restore of a graphical application. Require mods from compositors(worth starting with Weston) to get\set state. Here are some talks on #wayland.
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