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	Update kernel/.gitignore with new auto-generated files	2008-02-09 23:27:01 -08:00
acct.c	tty: Fix abusers of current->sighand->tty	2008-10-13 09:51:42 -07:00
audit_tree.c	[PATCH] list_for_each_rcu must die: audit	2008-05-17 03:30:23 -04:00
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	[PATCH 1/2] audit: move extern declarations to audit.h	2008-04-28 06:28:04 -04:00
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	backtrace: replace timer with tasklet + completions	2008-06-27 18:09:16 +02:00
bounds.c	Add kbuild.h that contains common definitions for kbuild users	2008-04-29 08:06:29 -07:00
capability.c	security: Fix setting of PF_SUPERPRIV by __capable()	2008-08-14 22:59:43 +10:00
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
cgroup.c	cgroups: convert tasks file to use a seq_file with shared pid array	2008-10-20 08:52:38 -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	per-task-delay-accounting: update taskstats for memory reclaim delay	2008-07-25 10:53:47 -07:00
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	[PATCH] kill altroot	2008-07-26 20:53:20 -04:00
exit.c	memrlimit: cgroup mm owner callback changes to add task info	2008-10-16 11:21:28 -07:00
extable.c	module: Don't report discarded init pages as kernel text.	2008-01-29 17:13:18 +11:00
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_compat.c	futex_compat __user annotation	2008-03-30 14:18:41 -07:00
futex.c	futexes: fix fault handling in futex_lock_pi	2008-06-23 13:31:15 +02:00
hrtimer.c	hrtimer: prevent migration of per CPU hrtimers	2008-09-29 17:09:14 +02:00
itimer.c	ITIMER_REAL: convert to use struct pid	2008-02-08 09:22:29 -08:00
kallsyms.c	kernel/kallsyms.c: fix double return	2008-10-16 11:21:32 -07:00
Kconfig.freezer	container freezer: implement freezer cgroup subsystem	2008-10-20 08:52:34 -07:00
Kconfig.hz	sched: fix SCHED_HRTICK dependency	2008-07-28 14:37:38 +02:00
Kconfig.preempt	rcu: move PREEMPT_RCU config option back under PREEMPT	2008-03-10 18:01:20 -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	tracehook: wait_task_inactive	2008-07-26 12:00:09 -07:00
latencytop.c	kernel: use non-racy method for proc entries creation	2008-04-29 08:06:22 -07:00
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
lockdep.c	lockdep: fix invalid list_del_rcu in zap_class	2008-08-27 08:40:36 +02:00
Makefile	container freezer: implement freezer cgroup subsystem	2008-10-20 08:52:34 -07:00
marker.c	markers: fix markers read barrier for multiple probes	2008-07-30 09:41:45 -07:00
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: check mutex magic before owner	2008-05-16 16:53:35 +02:00
mutex-debug.h
mutex.c	locking: fix mutex @key parameter kernel-doc notation	2008-07-28 18:12:36 +02:00
mutex.h
notifier.c	ipc: re-enable msgmni automatic recomputing msgmni if set to negative	2008-04-29 08:06:13 -07:00
ns_cgroup.c	cgroup_clone: use pid of newly created task for new cgroup	2008-07-25 10:53:37 -07:00
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	Add new string functions strict_strto* and convert kernel params to use them	2008-02-08 09:22:41 -08:00
pid_namespace.c	pid_ns: (BUG 11391) change ->child_reaper when init->group_leader exits	2008-09-02 19:21:38 -07:00
pid.c	pidns: remove now unused find_pid function.	2008-07-25 10:53:45 -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: print RT watchdog message	2008-05-24 18:49:22 +02:00
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_trace.c	rcu: trace fix possible mem-leak	2008-08-15 17:54:40 +02:00
rcupreempt.c	rcu: remove redundant ACCESS_ONCE definition from rcupreempt.c	2008-08-18 09:45:22 +02:00
rcutorture.c	rcu: make rcutorture even more vicious: invoke RCU readers from irq handlers (timers)	2008-06-26 09:24:33 +02:00
relay.c	relay: fix "full buffer with exactly full last subbuffer" accounting problem	2008-08-05 14:33:46 -07:00
res_counter.c	cgroup files: convert res_counter_write() to be a cgroups write_string() handler	2008-07-25 10:53:36 -07:00
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_common.h	Don't operate with pid_t in rtmutex tester	2008-02-08 09:22:41 -08:00
rtmutex-debug.c	Don't operate with pid_t in rtmutex tester	2008-02-08 09:22:41 -08:00
rtmutex-debug.h
rtmutex-tester.c	sysdev: Pass the attribute to the low level sysdev show/store function	2008-07-21 21:55:02 -07:00
rtmutex.c	hrtimer: more hrtimer_init_sleeper() fallout.	2008-02-13 15:45:36 +01:00
rtmutex.h
rwsem.c	sched: mark rwsem functions as __sched for wchan/profiling	2007-12-18 15:21:13 +01:00
sched_clock.c	sched_clock: prevent scd->clock from moving backwards	2008-10-10 11:17:04 +02:00
sched_cpupri.c	sched: use a 2-d bitmap for searching lowest-pri CPU	2008-06-06 15:19:28 +02:00
sched_cpupri.h	sched: fix the cpuprio count really	2008-06-06 15:19:44 +02:00
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	sched: fix accounting in task delay accounting & migration	2008-07-04 12:50:23 +02:00
sched.c	sched debug: add name to sched_domain sysctl entries	2008-10-09 17:13:06 +02:00
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	make srcu_readers_active() static	2008-02-06 10:41:02 -08:00
stacktrace.c	stacktrace: fix modular build, export print_stack_trace and save_stack_trace	2008-06-30 09:20:55 +02:00
stop_machine.c	stop_machine: remove unused variable	2008-08-12 17:52:55 +10:00
sys_ni.c	Configure out AIO support	2008-10-16 11:21:51 -07:00
sys.c	kernel/sys.c: improve code generation	2008-10-16 11:21:31 -07:00
sysctl_check.c	sysctl: check for bogus modes	2008-07-25 10:53:45 -07:00
sysctl.c	vmscan: unevictable LRU scan sysctl	2008-10-20 08:52:31 -07:00
taskstats.c	taskstats: remove initialization of static per-cpu variable	2008-07-25 10:53:47 -07:00
test_kprobes.c	kprobes: kretprobe user entry-handler	2008-02-06 10:41:11 -08:00
time.c	Make constants in kernel/timeconst.h fixed 64 bits	2008-05-02 16:18:42 -07:00
timeconst.pl	Make constants in kernel/timeconst.h fixed 64 bits	2008-05-02 16:18:42 -07:00
timer.c	printk: robustify printk	2008-08-11 13:46:53 +02:00
tsacct.c	task IO accounting: move all IO statistics in struct task_io_accounting	2008-07-27 16:12:28 -07:00
uid16.c	asmlinkage_protect replaces prevent_tail_call	2008-04-10 17:28:26 -07:00
user_namespace.c	removed unused #include <linux/version.h>'s	2008-08-23 12:14:12 -07:00
user.c	sched: rt-bandwidth for user grouping interface	2008-08-19 13:10:09 +02:00
utsname_sysctl.c	sysctl: simplify ->strategy	2008-10-16 11:21:47 -07:00
utsname.c	removed unused #include <linux/version.h>'s	2008-08-23 12:14:12 -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