Todo

component	task	assignee	comments
crtools/kernel	memory snapshot	xemul@	need to take mem snapshot in kernel for iterative migration, (probably) rebootless upgrade and HA
crtools	restore in namespace	-	having images taken from live app, need to restore them inside newly created namespace. For PID we'd have to provide our own init, for NET -- setup some veth.
crtools	TCP socket migration with changed IP	xemul@	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	Apply-images mode	xemul@	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	Modify restored resources run-time	xemul@	Need (probably) some way to alter what is being restored. Usage example -- change the IP address of sockets from task above.
crtools	partial migration	-	migrate some tasks while proxying IPC to existing others (pipes->sockets, etc.)
crtools	Shared objects (mm/fs/fdtable) support	avagin@	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.
kernel	Provide own defconfig	gorcunov@	suggested by avagin@
crtools	Paranoid dumping and restoring	-	Make paranoid checks for what we dump. E.g. pgid being valid (withing session) and fds drained from parasite are valid
kernel	Proc fdinfo extension	gorcunov@	Need to rework and resubmit the patches
kernel/crtools	posix timers	skinsbursky@	Need new kernel API for a) listing existing timers and b) fetching timer notify configuration.
crtools	Smart paths resolution	-	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 connection fixup	-	When we turn repair off a window probe is sent by kernel. It can be lost and we leave with stuck connection. Plus, the keepalive timer isn't rearmed on repaired socket connect, probably this is the way to solve this.
crtools	Iptables	-	This is easy. Need to run ipdables-save and iptables-restore
kernel/crtools	Auto namespaces detection	-	Now we "detect" them by looking at cmdline options
crtools	Migration w/o intermediate disk	Adrian Reber	-
kernel/crtools	TUN/TAP	-	-
vzkernel/crtools	OpenVZ kernel support	-	Within 3.5 and RHEL7 port
crtools	More sockoptions	xemul@	SOL_ are done
crtools	Bridges in container	-
crtools	cgroups in container	-
crtools/kernel	NFS	-
crtools/kernel	VDSO	-	issues: VDSO may change between kernels; vsyscall may change between kernels; VDSO mapping should be VDSO mapping, not regular one
crtools	Unmap a restorer VMA	-	Lots of ideas were generated so far.
crtools	file locks	-	It's hard to do it carefully. We need to make sure that all lock users are taken into dump. Only support it inside container?
crtools	rlimits	-	-
crtools	shutdown for inet sockets	-	There will probably be issues with TCP :( The tcp_shutdown doesn't look at repair being set