| component
|
task
|
complexity
|
potential/willing assignee
|
comments
|
|---|
| kernel/crtools |
Make proper "check lock present" API in the kernel |
medium |
- |
Currently we detect where a file lock belongs to by locking the file again with the alternative lock type and check how kernel reacts on that. This is not nice as it may tune the lock state on a file. Instead we need the "check lock on fd" call in the kernel.
|
| kernel/crtools |
Put call to mmap into VDSO |
easy |
Cyrill |
To put the parasite code into target process we modify its code to call the mmap() system call (and the unmodify it back) and put the parasite into new area. Oleg Nesterov suggests not to patch victim, but to always have one on VDSO.
|
| crtools |
Integration with other projects |
hard |
- |
CRIU is not working great by itself. There's alway some specific about what user wants to dump. Integrating CRIU with other projects will make CRIU work at its best.
|
| crtools |
Restore tasks into fresh new pid namespace |
easy |
- |
When we dumped processes, it can be hard to restore it back, if they didn't live in a pid namespace, due to PIDs conflict. It would be nice to have the ability to ask CRIU to create the pid namespace for those guys and restore them there. A thing to worry about is this new namespace's init task.
|
| crtools |
Rollback tree state |
medium |
- |
When we checkpointed process tree with -R option (let them run after checkpoint) we might want to return the tasks into checkpointed state on the same machine. Currently this can only be done by killing the processes and restoring them from scratch. If we could ask CRIU to restore the images into the ready processes that could speed things up, especially if carefully caring about memory changes tracking.
|
| crtools |
AIO with pending events |
medium |
- |
|
| crtools |
Restore arbitrary mountpoints tree |
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 |
- |
Packing or encrypting the data would be nice. Maybe it's purely for P.Haul?
|
| crtools |
FUSE mount points |
hard |
- |
|
| crtools |
32-bit tasks |
hard |
Cyrill |
|
| crtools |
Generate task's core file out of images with CRIT |
medium |
Ruslan Kuprieiev |
|
| crtools |
Modify restored resources run-time in CRIT daemon |
medium |
- |
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
|
| kernel?/crtools |
TCP conntrack-ed connections |
medium |
- |
Need to check whether connection tracking is ON, dump the needed conntrack info and put the tracker back.
|
| crtools |
Bridges in container |
medium |
- |
|
| crtools |
VLANs in containers |
medium |
- |
|
| crtools |
PPP support |
medium |
- |
|
| crtools/kernel |
NFS mount points support |
hard |
- |
|
| kernel |
Seamless kernel upgrade |
hard |
xemul |
|
| crtools |
Validate .img files |
easy |
- |
CRIT For a given set of image files check, that they are in "restorable" shape
|
| crtools |
Restore arbitrary 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 |
C/R X app |
hard |
Ruslan Kuprieiev |
Dump/restore of graphical applications (see about integration)
|
| 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 |
FS-notify queues |
hard |
- |
Fsnotify
|