CRIU

Some time ago on LinuxCon Europe in Barcelona we were asked about how hard would it be to make CRIU work on some new architecture. +Pavel Emelyanov answered, that it should not be complex, just adding dump and restore of architecture-specific ... [More] information (registers) and rewriting relatively small amount of assembly code. Now we have chance to properly evaluate that statement, because this work has been done for the ARM platform! Not that one can live-migrate applications from one Android phone to another right now :) but ... it's just the first step towards this extremely useful facility.So, after this merge the whole crtools code is about 31K lines of code (excluding tests), the x86 specific code is only 1.4K lines and the ARM specific code is 1.5K lines. Not that much indeed. However, it took several rotations of patch sets to settle down all the 64- versus 32-bit issues.The biggest limitation to using CRIU on ARM right now is that the mainstream kernel is missing the significant part -- the sys_kcmp system call, that allows to properly evaluate which objects tasks share, is not yet included into the ARM syscall table. But the good news is that this patch sits in the CRIU kernel repository and is sent to the ARM maintainers waiting for being merged.Well, the upcoming v0.4 release is going to be very feature-rich! :) [Less]

We're going to present CRIU on 3 continents soon!First, +Pavel Emelyanov will give a talk at linux.conf.au, aka LCA in Canberra, Australia. https://lca2013.linux.org.au/schedule/30116/view_talk?day=thursdayNext, +Andrey Wagin will present CRIU at ... [More] FOSDEM in Brussels. https://fosdem.org/2013/schedule/event/criu_ckeckpoint_restore/And to sum this up, +Kirill Kolyshkin is sharing CRIU insights at SCALE 11x event in Los-Angeles. https://www.socallinuxexpo.org/scale11x/presentations/checkpoint-restore-live-migration-and-beyondSo, it's Australia, Europe and North America :) Everybody is welcome to attend!_To be aware of the upcoming CRIU events, visit http://criu.org/News/events_ [Less]

+Fedora Project is picking up CRIUGood news everyone! Checkpoint/Restore feature is a candidate for Fedora 19, and it looks like +Adrian Reber already prepared crtools to be packaged for Fedora. Once the initial support will be there, we hope that ... [More] +systemd guys will pick it up and create some wonderful miracles based on what CRIU can do.Thanks to +Peter Lemenkov for letting us know about this [Less]

New old CRIU feature.In the early criu features we had two deliberately made bugs in c/r-ing the stdio file descriptors. They were made deliberately for easier testing of trivial processes launched in shell. We released v0.1 with them and fixed them ... [More] in v0.2 together with tty-s support. People noticed this very fast, as their first attempt to play with criu was the same -- they tried to c/r an app run from shell, and found that with new release this stopped working.Now this ability is back and sits under the --shell-job cmdline option. Give it a try! [Less]