Support restoring recursive bind-mounts

Bug #1574842 reported by Stéphane Graber
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
criu (Ubuntu)
Triaged
High
Unassigned

Bug Description

LXD uses recursive bind-mounts for things like /sys/kernel/debug. CRIU should detect those and restore them properly.

Right now this particular case is causing migration failures when the target has /sys/kernel/debug/tracing mounted.

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