Paul Menage cc31edceee cgroups: convert tasks file to use a seq_file with shared pid array ... Rather than pre-generating the entire text for the "tasks" file each time the file is opened, we instead just generate/update the array of process ids and use a seq_file to report these to userspace. All open file handles on the same "tasks" file can share a pid array, which may be updated any time that no thread is actively reading the array. By sharing the array, the potential for userspace to DoS the system by opening many handles on the same "tasks" file is removed. [Based on a patch by Lai Jiangshan, extended to use seq_file] Signed-off-by: Paul Menage <menage@google.com> Reviewed-by: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Serge Hallyn <serue@us.ibm.com> Cc: Balbir Singh <balbir@in.ibm.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>		2008-10-20 08:52:38 -07:00
..
irq	Merge branch 'linus' into x86/core	2008-08-14 14:58:01 +02:00
power	container freezer: skip frozen cgroups during power management resume	2008-10-20 08:52:34 -07:00
time	Merge branch 'core-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-10-16 15:17:40 -07:00
trace	hrtimer: prevent migration of per CPU hrtimers	2008-09-29 17:09:14 +02:00
.gitignore	…
Kconfig.freezer	container freezer: implement freezer cgroup subsystem	2008-10-20 08:52:34 -07:00
Kconfig.hz	…
Kconfig.preempt	…
Makefile	container freezer: implement freezer cgroup subsystem	2008-10-20 08:52:34 -07:00
acct.c	tty: Fix abusers of current->sighand->tty	2008-10-13 09:51:42 -07:00
audit.c	[PATCH] Fix the bug of using AUDIT_STATUS_RATE_LIMIT when set fail, no error output.	2008-08-01 12:15:16 -04:00
audit.h	…
audit_tree.c	…
auditfilter.c	Re: [PATCH] the loginuid field should be output in all AUDIT_CONFIG_CHANGE audit messages	2008-08-01 12:15:03 -04:00
auditsc.c	tty: Fix abusers of current->sighand->tty	2008-10-13 09:51:42 -07:00
backtracetest.c	…
bounds.c	…
capability.c	security: Fix setting of PF_SUPERPRIV by __capable()	2008-08-14 22:59:43 +10:00
cgroup.c	cgroups: convert tasks file to use a seq_file with shared pid array	2008-10-20 08:52:38 -07:00
cgroup_debug.c	cgroups: fix probable race with put_css_set[_taskexit] and find_css_set	2008-10-20 08:52:38 -07:00
cgroup_freezer.c	container freezer: rename check_if_frozen()	2008-10-20 08:52:34 -07:00
compat.c	compat: generic compat get/settimeofday	2008-10-16 11:21:33 -07:00
configs.c	kernel/configs.c: remove useless comments	2008-10-20 08:52:34 -07:00
cpu.c	Merge branches 'sched/devel', 'sched/cpu-hotplug', 'sched/cpusets' and 'sched/urgent' into sched/core	2008-10-08 11:31:02 +02:00
cpuset.c	cpusets: scan_for_empty_cpusets(), cpuset doesn't seem to be so const	2008-10-03 13:39:50 +02:00
delayacct.c	…
dma-coherent.c	dma-coherent: export dma_[alloc|release]_from_coherent methods	2008-08-22 08:34:53 +02:00
dma.c	kernel/dma.c: remove a CVS keyword	2008-10-16 11:21:30 -07:00
exec_domain.c	…
exit.c	memrlimit: cgroup mm owner callback changes to add task info	2008-10-16 11:21:28 -07:00
extable.c	…
fork.c	tty: Add a kref count	2008-10-13 09:51:40 -07:00
freezer.c	container freezer: implement freezer cgroup subsystem	2008-10-20 08:52:34 -07:00
futex.c	…
futex_compat.c	…
hrtimer.c	hrtimer: prevent migration of per CPU hrtimers	2008-09-29 17:09:14 +02:00
itimer.c	…
kallsyms.c	kernel/kallsyms.c: fix double return	2008-10-16 11:21:32 -07:00
kexec.c	kexec: fix segmentation fault in kimage_add_entry	2008-09-23 08:09:14 -07:00
kfifo.c	…
kgdb.c	kgdb: call touch_softlockup_watchdog on resume	2008-10-06 13:50:59 -05:00
kmod.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus	2008-10-16 12:38:34 -07:00
kprobes.c	make kprobes.c:kretprobe_table_lock() static	2008-10-16 11:21:52 -07:00
ksysfs.c	profiling: dynamically enable readprofile at runtime	2008-10-16 11:21:31 -07:00
kthread.c	…
latencytop.c	…
lockdep.c	lockdep: fix invalid list_del_rcu in zap_class	2008-08-27 08:40:36 +02:00
lockdep_internals.h	lockdep: build fix	2008-08-13 12:55:10 +02:00
lockdep_proc.c	lockstat: fix numerical output rounding error	2008-08-26 10:37:46 +02:00
marker.c	…
module.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6	2008-10-17 09:50:12 -07:00
mutex-debug.c	…
mutex-debug.h	…
mutex.c	…
mutex.h	…
notifier.c	…
ns_cgroup.c	…
nsproxy.c	removed unused #include <linux/version.h>'s	2008-08-23 12:14:12 -07:00
panic.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6	2008-10-17 09:50:12 -07:00
params.c	…
pid.c	…
pid_namespace.c	pid_ns: (BUG 11391) change ->child_reaper when init->group_leader exits	2008-09-02 19:21:38 -07:00
pm_qos_params.c	pm_qos_requirement might sleep	2008-09-02 19:21:40 -07:00
posix-cpu-timers.c	…
posix-timers.c	fix error-path NULL deref in alloc_posix_timer()	2008-10-02 15:53:13 -07:00
printk.c	Merge branch 'core-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-10-16 15:17:40 -07:00
profile.c	profiling: dynamically enable readprofile at runtime	2008-10-16 11:21:31 -07:00
ptrace.c	security: Fix setting of PF_SUPERPRIV by __capable()	2008-08-14 22:59:43 +10:00
rcuclassic.c	rcu: RCU-based detection of stalled CPUs for Classic RCU, fix	2008-10-03 10:41:00 +02:00
rcupdate.c	rcu: fix synchronize_rcu() so that kernel-doc works	2008-08-21 09:31:44 +02:00
rcupreempt.c	rcu: remove redundant ACCESS_ONCE definition from rcupreempt.c	2008-08-18 09:45:22 +02:00
rcupreempt_trace.c	rcu: trace fix possible mem-leak	2008-08-15 17:54:40 +02:00
rcutorture.c	…
relay.c	relay: fix "full buffer with exactly full last subbuffer" accounting problem	2008-08-05 14:33:46 -07:00
res_counter.c	…
resource.c	Merge branch 'core-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-10-16 15:17:40 -07:00
rtmutex-debug.c	…
rtmutex-debug.h	…
rtmutex-tester.c	…
rtmutex.c	…
rtmutex.h	…
rtmutex_common.h	…
rwsem.c	…
sched.c	sched debug: add name to sched_domain sysctl entries	2008-10-09 17:13:06 +02:00
sched_clock.c	sched_clock: prevent scd->clock from moving backwards	2008-10-10 11:17:04 +02:00
sched_cpupri.c	…
sched_cpupri.h	…
sched_debug.c	[PATCH] signal, procfs: some lock_task_sighand() users do not need rcu_read_lock()	2008-10-10 04:18:57 +04:00
sched_fair.c	sched: sync wakeups vs avg_overlap	2008-10-08 12:20:26 +02:00
sched_features.h	sched: turn off WAKEUP_OVERLAP	2008-09-22 16:29:00 +02:00
sched_idletask.c	sched: wakeup preempt when small overlap	2008-09-22 16:28:32 +02:00
sched_rt.c	sched_rt.c: resch needed in rt_rq_enqueue() for the root rt_rq	2008-10-04 14:31:54 +02:00
sched_stats.h	…
seccomp.c	…
semaphore.c	semaphore: __down_common: use signal_pending_state()	2008-08-05 14:33:47 -07:00
signal.c	tracehook: fix SA_NOCLDWAIT	2008-08-19 20:37:07 -07:00
smp.c	smp: have smp_call_function_single() detect invalid CPUs	2008-08-25 17:45:48 -07:00
softirq.c	softirq: Add support for triggering softirq work on softirqs.	2008-10-17 08:46:56 +02:00
softlockup.c	Make the taint flags reliable	2008-10-16 11:21:31 -07:00
spinlock.c	lockdep: spin_lock_nest_lock(), checkpatch fixes	2008-08-13 13:56:51 +02:00
srcu.c	…
stacktrace.c	…
stop_machine.c	stop_machine: remove unused variable	2008-08-12 17:52:55 +10:00
sys.c	kernel/sys.c: improve code generation	2008-10-16 11:21:31 -07:00
sys_ni.c	Configure out AIO support	2008-10-16 11:21:51 -07:00
sysctl.c	vmscan: unevictable LRU scan sysctl	2008-10-20 08:52:31 -07:00
sysctl_check.c	…
taskstats.c	…
test_kprobes.c	…
time.c	…
timeconst.pl	…
timer.c	printk: robustify printk	2008-08-11 13:46:53 +02:00
tsacct.c	…
uid16.c	…
user.c	sched: rt-bandwidth for user grouping interface	2008-08-19 13:10:09 +02:00
user_namespace.c	removed unused #include <linux/version.h>'s	2008-08-23 12:14:12 -07:00
utsname.c	removed unused #include <linux/version.h>'s	2008-08-23 12:14:12 -07:00
utsname_sysctl.c	sysctl: simplify ->strategy	2008-10-16 11:21:47 -07:00
wait.c	wait: kill is_sync_wait()	2008-10-16 11:21:31 -07:00
workqueue.c	Remove Andrew Morton's old email accounts	2008-10-16 11:21:32 -07:00