From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oren Laadan Subject: Linux Checkpoint-Restart - v19 Date: Mon, 22 Feb 2010 18:17:00 -0500 Message-ID: <4B83106C.7040203@cs.columbia.edu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Andrew Morton Cc: Linux-Containers , Linux-Kernel List-Id: containers.vger.kernel.org Hi Andrew, We've put a stake in the ground for our next set of checkpoint/restart patches, v19. It has some great new stuff, and we put extra effort to address your concerns. We would like to have the code included in -mm for wider feedback and testing. This one is able to checkpoint/restart screen and vnc sessions, and live-migrate network servers between hosts. It also adds support for x86-64 (in addition to x86-32, s390x and powerpc). It is rebased to kernel 2.6.33-rc8. Since one of your main concerns was about what is not yet implemented and how complicated or ugly it will be to support that, we've put up a wiki page to address that. In it there is a simple table that lists what is not implemented and the anticipated solution impact, and for some entries a link to more details. The page is here: http://ckpt.wiki.kernel.org/index.php/Checklist We want to stress that the patchset is already very useful as-is. We will keep working to implement more features cleanly. Some features we are working on include network namespaces and device configurations, mounts and mounts namespaces, and file locks. Should a complicated feature prove hard to implement, users have alternatives systems like kvm, until we manage to come up with a clean solution. We believe that maintenance is best addressed through testing. We now have a comprehensive test-suite to automatically find regressions. In addition, we ran LTP and the results are the same with CHECKPOINT=n and =y. If desired we'll send the whole patchset to lkml, but the git trees can be seen at: kernel: http://www.linux-cr.org/git/?p=linux-cr.git;a=summary user tools: http://www.linux-cr.org/git/?p=user-cr.git;a=summary tests suite: http://www.linux-cr.org/git/?p=tests-cr.git;a=summary Thanks, Application checkpoint/restart team