<div dir="ltr"><div>Hi, Tycho<br></div>Thanks for your suggestion. I am using criu RPC calls, where I can not find the four mode for cgroup-manager. Instead, it is a bool type value.<br><pre class="de1">optional bool manage_cgroups <span class="sy0">=</span> <span class="nu0">24</span><span class="sy0">;</span></pre>Should I update my criu version (I am using v1.6)?<br><div><div><div><br>- Hui<br><div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Aug 4, 2015 at 5:15 PM, Tycho Andersen <span dir="ltr"><<a href="mailto:tycho.andersen@canonical.com" target="_blank">tycho.andersen@canonical.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On Tue, Aug 04, 2015 at 05:01:14PM -0400, Hui Kang wrote:<br>
> Hi,<br>
> I am trying to restore the process on a different criu host by transferring<br>
> the CRIU images. The checkpointed criu images are scp-ed to a different<br>
> host; however the restore fails. The restore.log shows that<br>
><br>
> (00.075765) 1: nr_restored_pages: 66<br>
> (00.075772) 1: nr_shared_pages: 0<br>
> (00.075779) 1: nr_droped_pages: 0<br>
> (00.075829) 1: Found fd 1 (id pipe:[13922]) in inherit fd list (caller<br>
> close_old_fds)<br>
> (00.075841) 1: Found fd 2 (id pipe:[13923]) in inherit fd list (caller<br>
> close_old_fds)<br>
> (00.075859) 1: cg: Move into 2<br>
> 1: cg: `-> blkio//[PID]/tasks<br>
> (00.075906) 1: cg: `-> cpu//[PID]/tasks<br>
> (00.075946) 1: cg: `-> cpuacct//[PID]/tasks<br>
> (00.075967) 1: cg: `-> cpuset//[PID]/tasks<br>
> (00.076008) 1: Error (cgroup.c:901): cg: Can't move into<br>
> cpuset//[PID]/tasks (-1/0): No space left on device<br>
> (00.082249) Error (cr-restore.c:1919): Restoring FAILED.<br>
><br>
> Note that the process being migrated has its cgroup directory in the source<br>
> node, which apparently does not exist in the destination host. So I first<br>
> mkdir /sys/fs/cgroup/cpu/PID .... and copy the content from the source to<br>
> destination.<br>
<br>
</span>You might want to use one of the new `--manage-cgroups full` mode to<br>
do this for you. That said, moving something into cpuset's tasks fails<br>
with ENOSPC for the following reasons (from cpuset(7)):<br>
<br>
ENOSPC Attempted to write(2) the process ID (PID) of a process to a cpuset<br>
tasks file when the cpuset had an empty cpuset.cpus or empty cpuset.mems<br>
setting.<br>
<br>
ENOSPC Attempted to write(2) an empty cpuset.cpus or cpuset.mems setting to a<br>
cpuset that has tasks attached.<br>
<br>
So depending on what you copied over, it can cause some problems. In<br>
`--manage-cgroups full` mode, criu's code should be smart enough to handle<br>
things, though.<br>
<br>
Tycho<br>
<span class=""><br>
> Is there anything wrong in these steps? Thanks.<br>
><br>
> - Hui<br>
<br>
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</blockquote></div><br></div></div></div></div></div></div></div></div>