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cgroup2: use CRIU's new freezer v2 support 

The newest CRIU version supports freezer v2 and this tells runc
to use it if new enough or fall back to non-freezer based process
freezing on cgroup v2 system.

Signed-off-by: Adrian Reber <areber@redhat.com>
This commit is contained in:
Adrian Reber 2020-02-05 09:32:21 +00:00 committed by Adrian Reber
parent 4a9e1747da
commit 9a0184b10f
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1 changed files with 8 additions and 3 deletions
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11
libcontainer/container_linux.go
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@ -1015,9 +1015,14 @@ func (c *linuxContainer) Checkpoint(criuOpts *CriuOpts) error {
}
}
fcg := c.cgroupManager.GetPaths()["freezer"]
if fcg != "" {
rpcOpts.FreezeCgroup = proto.String(fcg)
if !cgroups.IsCgroup2UnifiedMode() && c.checkCriuVersion(31400) == nil {
// CRIU currently cannot handle the v2 freezer correctly
// before release 3.14. For older releases we are telling
// CRIU to not use the cgroup v2 freezer. CRIU will pause
// each process manually using ptrace().
if fcg := c.cgroupManager.GetPaths()["freezer"]; fcg != "" {
rpcOpts.FreezeCgroup = proto.String(fcg)
}
}
// append optional criu opts, e.g., page-server and port