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Line 84: − + − − === Configuring the kernel === − − Most likely the first thing to enable is the <code>CONFIG_EXPERT=y</code> (General setup -> Configure standard kernel features (expert users)) option, which on x86_64 depends on the <code>CONFIG_EMBEDDED=y</code> (General setup -> Embedded system) one (welcome to Kconfig reverse chains hell). − − The following options must be enabled for CRIU to work: − − * ''General setup'' options − ** <code>CONFIG_CHECKPOINT_RESTORE=y</code> (Checkpoint/restore support) − ** <code>CONFIG_NAMESPACES=y</code> (Namespaces support) − ** <code>CONFIG_UTS_NS=y</code> (Namespaces support -> UTS namespace) − ** <code>CONFIG_IPC_NS=y</code> (Namespaces support -> IPC namespace) − ** <code>CONFIG_PID_NS=y</code> (Namespaces support -> PID namespaces) − ** <code>CONFIG_NET_NS=y</code> (Namespaces support -> Network namespace) − ** <code>CONFIG_FHANDLE=y</code> (Open by fhandle syscalls) − ** <code>CONFIG_EVENTFD=y</code> (Enable eventfd() system call) − ** <code>CONFIG_EPOLL=y</code> (Enable eventpoll support) − * ''Networking support -> Networking options'' options for sock-diag subsystem − ** <code>CONFIG_UNIX_DIAG=y</code> (Unix domain sockets -> UNIX: socket monitoring interface) − ** <code>CONFIG_INET_DIAG=y</code> (TCP/IP networking -> INET: socket monitoring interface) − ** <code>CONFIG_INET_UDP_DIAG=y</code> (TCP/IP networking -> INET: socket monitoring interface -> UDP: socket monitoring interface) − ** <code>CONFIG_PACKET_DIAG=y</code> (Packet socket -> Packet: sockets monitoring interface) − ** <code>CONFIG_NETLINK_DIAG=y</code> (Netlink socket -> Netlink: sockets monitoring interface) − − Other options not required by CRIU, but C/R supported ([[ZDTM test suite]] may fail without them): − * <code>CONFIG_INOTIFY_USER=y</code> (File systems -> Inotify support for userspace) − * <code>CONFIG_FANOTIFY=y</code> (File systems -> Filesystem wide access notification) − * <code>CONFIG_NETFILTER_XT_MARK=y</code> (Networking support -> Networking options -> Network packet filtering framework (Netfilter) -> Core Netfilter Configuration -> Netfilter Xtables support (required for ip_tables) -> nfmark target and match support) − * <code>CONFIG_MEMCG=y</code> (General setup -> Control Group support -> Memory controller) − * <code>CONFIG_CGROUP_DEVICE=y</code> (General setup -> Control Group support -> Device controller) − * <code>CONFIG_MACVLAN=y</code> (Device Drivers -> Network device support -> Network core driver support -> MAC-VLAN support) − * <code>CONFIG_BRIDGE=y</code> (Networking support -> Networking options -> 802.1d Ethernet Bridging) − * <code>CONFIG_BINFMT_MISC=y</code> (Userspace binary formats -> Kernel support for MISC binaries) − * <code>CONFIG_IA32_EMULATION=y</code> (x86 only) (Executable file formats -> Emulations -> IA32 Emulation) − − For some [[usage scenarios]] there is an ability to track memory changes and produce [[incremental dumps]]. Need to enable the <code>CONFIG_MEM_SOFT_DIRTY=y</code> (optional) (Processor type and features -> Track memory changes). − − Note we also have our [[custom kernel]], which might contain some experimental CRIU related patches.
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== Linux Kernel ==
== Linux Kernel ==
Linux kernel v3.11 or newer is required, with some specific options set. If your distribution does not provide needed kernel, you might want to compile one yourself.
Linux kernel v3.11 or newer is required, with some specific options set. If your distribution does not provide needed kernel, you might want to [[Linux kernel|compile one yourself]].
== Building CRIU From Source ==
== Building CRIU From Source ==