A few suggestions for reducing the footprint of pid namespaces when
CONFIG_PID_NS=n. The savings are admittedly not huge:
$ scripts/bloat-o-meter /tmp/vmlinux.master vmlinux
add/remove: 0/7 grow/shrink: 30/25 up/down: 368/-1032 (-664)
Rasmus Villemoes (4):
pid_namespace: remove ->level and ->parent for !CONFIG_PID_NS
pid_namespace: remove .kref field for !CONFIG_PID_NS
pid_namespace: make pid_nr_ns and pid_vnr static inlines for
!CONFIG_PID_NS
pid_namespace: disable_pid_allocation is unused for !CONFIG_PID_NS
include/linux/pid.h | 11 +++++++++++
include/linux/pid_namespace.h | 20 ++++++++++++++++++++
kernel/acct.c | 4 ++--
kernel/pid.c | 24 +++++++++++++++---------
4 files changed, 48 insertions(+), 11 deletions(-)
--
2.1.3
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