WSL2-Linux-Kernel/arch/ia64
Serge E. Hallyn b460cbc581 pid namespaces: define is_global_init() and is_container_init()
is_init() is an ambiguous name for the pid==1 check.  Split it into
is_global_init() and is_container_init().

A cgroup init has it's tsk->pid == 1.

A global init also has it's tsk->pid == 1 and it's active pid namespace
is the init_pid_ns.  But rather than check the active pid namespace,
compare the task structure with 'init_pid_ns.child_reaper', which is
initialized during boot to the /sbin/init process and never changes.

Changelog:

	2.6.22-rc4-mm2-pidns1:
	- Use 'init_pid_ns.child_reaper' to determine if a given task is the
	  global init (/sbin/init) process. This would improve performance
	  and remove dependence on the task_pid().

	2.6.21-mm2-pidns2:

	- [Sukadev Bhattiprolu] Changed is_container_init() calls in {powerpc,
	  ppc,avr32}/traps.c for the _exception() call to is_global_init().
	  This way, we kill only the cgroup if the cgroup's init has a
	  bug rather than force a kernel panic.

[akpm@linux-foundation.org: fix comment]
[sukadev@us.ibm.com: Use is_global_init() in arch/m32r/mm/fault.c]
[bunk@stusta.de: kernel/pid.c: remove unused exports]
[sukadev@us.ibm.com: Fix capability.c to work with threaded init]
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Acked-by: Pavel Emelianov <xemul@openvz.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Herbert Poetzel <herbert@13thfloor.at>
Cc: Kirill Korotaev <dev@sw.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-19 11:53:37 -07:00
..
configs task cgroups: enable cgroups by default in some configs 2007-10-19 11:53:36 -07:00
dig [PATCH] tty: Remove include of screen_info.h from tty.h 2006-07-10 13:24:16 -07:00
hp IA64: iommu uses sg_next with an invalid sg element 2007-10-17 10:51:20 +02:00
ia32 Make unregister_binfmt() return void 2007-10-17 08:42:46 -07:00
kernel Fix discrepancy between VDSO based gettimeofday() and sys_gettimeofday(). 2007-10-18 14:37:20 -07:00
lib missing exports of csum_... 2007-07-17 11:01:07 -07:00
mm pid namespaces: define is_global_init() and is_container_init() 2007-10-19 11:53:37 -07:00
oprofile Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
pci [IA64] Nail two more simple section mismatch errors 2007-07-25 13:08:41 -07:00
scripts Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sn Add missing newlines to some uses of dev_<level> messages 2007-10-18 14:37:28 -07:00
Kconfig KCONFIG: Make "Instrumentation support" non-EXPERIMENTAL 2007-10-17 08:42:47 -07:00
Kconfig.debug [PATCH] Move Kprobes and Oprofile to "Instrumentation Support" menu 2005-11-07 07:53:35 -08:00
Makefile kbuild: enable 'make CPPFLAGS=...' to add additional options to CPP 2007-10-15 22:17:25 +02:00
defconfig [IA64] Update arch/ia64/configs/* s/SLAB/SLUB/ 2007-08-13 14:54:34 -07:00
install.sh Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
module.lds Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00