From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Emelyanov Subject: Re: [Announce] Checkpoint-restore tool v0.1 Date: Tue, 31 Jul 2012 12:53:04 +0400 Message-ID: <50179CF0.7050200@parallels.com> References: <500D09C9.7060903@parallels.com> <500D1116.7070301@parallels.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Id: 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: richard -rw- weinberger Cc: "users-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org" , Containers , Linux Kernel Mailing List , "criu-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org" , "lwn-T1hC0tSOHrs@public.gmane.org" , cgroups mailinglist On 07/30/2012 02:42 PM, richard -rw- weinberger wrote: > On Mon, Jul 23, 2012 at 10:53 AM, Pavel Emelyanov wrote: >> This project is an attempt to implement the checkpoint-restore functionality >> for processes and containers without driving too much code into the kernel tree, >> but putting there "various oddball helper code" instead. > > Is CRIU able to checkpoint a process tree where one or more processes > are traced using ptrace()? No it's not (currently). > crtools seem to use ptrace() to execute parasite system calls. > AFAIK this will only work if the target process is currently not > ptraced() by another process. > Yup, exactly. Thanks, Pavel