Cyrill Gorcunov 818411616b fs, proc: introduce /proc/<pid>/task/<tid>/children entry ...

When we do checkpoint of a task we need to know the list of children the
task, has but there is no easy and fast way to generate reverse
parent->children chain from arbitrary <pid> (while a parent pid is
provided in "PPid" field of /proc/<pid>/status).

So instead of walking over all pids in the system (creating one big
process tree in memory, just to figure out which children a task has) --
we add explicit /proc/<pid>/task/<tid>/children entry, because the kernel
already has this kind of information but it is not yet exported.

This is a first level children, not the whole process tree.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Serge Hallyn <serge.hallyn@canonical.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2012-05-31 17:49:32 -07:00

..

array.c

fs, proc: introduce /proc/<pid>/task/<tid>/children entry

2012-05-31 17:49:32 -07:00

base.c

fs, proc: introduce /proc/<pid>/task/<tid>/children entry

2012-05-31 17:49:32 -07:00

cmdline.c

proc: switch /proc/cmdline to seq_file

2008-10-23 14:29:04 +04:00

consoles.c

console: rename acquire/release_console_sem() to console_lock/unlock()

2011-01-26 10:50:06 +10:00

cpuinfo.c

proc: move /proc/cpuinfo code to fs/proc/cpuinfo.c

2008-10-23 15:05:11 +04:00

devices.c

proc: use seq_puts()/seq_putc() where possible

2011-01-13 08:03:16 -08:00

generic.c

switch procfs to umode_t use

2012-01-03 22:54:56 -05:00

inode.c

avoid iput() from flusher thread

2012-05-28 09:54:45 -07:00

internal.h

fs, proc: introduce /proc/<pid>/task/<tid>/children entry

2012-05-31 17:49:32 -07:00

interrupts.c

proc: move /proc/interrupts boilerplate code to fs/proc/interrupts.c

2008-10-23 15:15:46 +04:00

Kconfig

kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT

2011-01-20 17:02:05 -08:00

kcore.c

fs/proc/kcore.c: make get_sparsemem_vmemmap_info() static

2012-03-23 16:58:42 -07:00

kmsg.c

procfs: Use generic_file_llseek in /proc/kmsg

2010-04-09 16:35:41 +02:00

loadavg.c

sched, timers: cleanup avenrun users

2009-05-15 15:32:45 +02:00

Makefile

ns: proc files for namespace naming policy.

2011-05-10 14:31:44 -07:00

meminfo.c

fs/proc/meminfo.c: fix compilation error

2011-12-09 07:50:28 -08:00

mmu.c

fs/proc/mmu.c: headers butchery

2007-10-17 08:42:48 -07:00

namespaces.c

fs/proc/namespaces.c: prevent crash when ns_entries[] is empty

2012-03-28 17:14:37 -07:00

nommu.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

page.c

pagemap: export KPF_THP

2012-03-21 17:54:57 -07:00

proc_devtree.c

of/flattree: Drop an uninteresting message to pr_debug level

2011-03-02 13:45:18 -07:00

proc_net.c

switch procfs to umode_t use

2012-01-03 22:54:56 -05:00

proc_sysctl.c

userns: Convert sysctl permission checks to use kuid and kgids.

2012-05-15 14:59:28 -07:00

proc_tty.c

proc: use seq_puts()/seq_putc() where possible

2011-01-13 08:03:16 -08:00

root.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2012-05-23 17:42:39 -07:00

softirqs.c

proc: use seq_puts()/seq_putc() where possible

2011-01-13 08:03:16 -08:00

stat.c

proc: stats: Use arch_idle_time for idle and iowait times if available

2012-03-30 15:43:33 +02:00

task_mmu.c

proc/smaps: show amount of nonlinear ptes in vma

2012-05-31 17:49:29 -07:00

task_nommu.c

proc: remove mm_for_maps()

2012-05-31 17:49:28 -07:00

uptime.c

Merge branch 'sched/core' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into cputime-tip

2011-12-19 19:23:15 +01:00

version.c

proc: switch /proc/version to seq_file

2008-10-23 14:19:58 +04:00

vmcore.c

fadump: Introduce cleanup routine to invalidate /proc/vmcore.

2012-02-23 10:50:02 +11:00