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| author | Cyrill Gorcunov <gorcunov@gmail.com> | 2012-05-31 16:26:42 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-31 17:49:32 -0700 |
| commit | 98ed57eef9f67dfe541be0bca34660ffc88365b2 (patch) | |
| tree | 1dee418c15205a31a811597587bdec9d1bc0cdd2 /kernel/pid_namespace.c | |
| parent | ac34ebb3a67e699edcb5ac72f19d31679369dfaa (diff) | |
| download | lwn-98ed57eef9f67dfe541be0bca34660ffc88365b2.tar.gz lwn-98ed57eef9f67dfe541be0bca34660ffc88365b2.zip | |
sysctl: make kernel.ns_last_pid control dependent on CHECKPOINT_RESTORE
For those who doesn't need C/R functionality there is no need to control
last pid, ie the pid for the next fork() call.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/pid_namespace.c')
| -rw-r--r-- | kernel/pid_namespace.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c index fd3c44986191..16b20e38c4a1 100644 --- a/kernel/pid_namespace.c +++ b/kernel/pid_namespace.c @@ -196,6 +196,7 @@ void zap_pid_ns_processes(struct pid_namespace *pid_ns) return; } +#ifdef CONFIG_CHECKPOINT_RESTORE static int pid_ns_ctl_handler(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { @@ -223,8 +224,8 @@ static struct ctl_table pid_ns_ctl_table[] = { }, { } }; - static struct ctl_path kern_path[] = { { .procname = "kernel", }, { } }; +#endif /* CONFIG_CHECKPOINT_RESTORE */ int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd) { @@ -258,7 +259,10 @@ int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd) static __init int pid_namespaces_init(void) { pid_ns_cachep = KMEM_CACHE(pid_namespace, SLAB_PANIC); + +#ifdef CONFIG_CHECKPOINT_RESTORE register_sysctl_paths(kern_path, pid_ns_ctl_table); +#endif return 0; } |