Oleg Nesterov 901608d904 mm: introduce get_mm_hiwater_xxx(), fix taskstats->hiwater_xxx accounting ... xacct_add_tsk() relies on do_exit()->update_hiwater_xxx() and uses mm->hiwater_xxx directly, this leads to 2 problems: - taskstats_user_cmd() can call fill_pid()->xacct_add_tsk() at any moment before the task exits, so we should check the current values of rss/vm anyway. - do_exit()->update_hiwater_xxx() calls are racy. An exiting thread can be preempted right before mm->hiwater_xxx = new_val, and another thread can use A_LOT of memory and exit in between. When the first thread resumes it can be the last thread in the thread group, in that case we report the wrong hiwater_xxx values which do not take A_LOT into account. Introduce get_mm_hiwater_rss() and get_mm_hiwater_vm() helpers and change xacct_add_tsk() to use them. The first helper will also be used by rusage->ru_maxrss accounting. Kill do_exit()->update_hiwater_xxx() calls. Unless we are going to decrease rss/vm there is no point to update mm->hiwater_xxx, and nobody can look at this mm_struct when exit_mmap() actually unmaps the memory. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Hugh Dickins <hugh@veritas.com> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-01-06 15:59:09 -08:00
..
irq	Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-01-03 12:04:39 -08:00
power	cpumask: convert rest of files in kernel/	2009-01-01 10:12:28 +10:30
time	Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-01-03 12:04:39 -08:00
trace	Merge branch 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-01-02 11:44:09 -08:00
.gitignore	Update kernel/.gitignore with new auto-generated files	2008-02-09 23:27:01 -08:00
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: provide RCU options on non-preempt architectures too	2008-12-25 09:31:28 +01:00
Makefile	Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-30 16:10:19 -08:00
acct.c	CRED: Wrap task credential accesses in the core kernel	2008-11-14 10:39:12 +11:00
audit.c	[PATCH] fix broken timestamps in AVC generated by kernel threads	2008-12-09 02:27:41 -05:00
audit.h	fixing audit rule ordering mess, part 1	2009-01-04 15:14:41 -05:00
audit_tree.c	audit: validate comparison operations, store them in sane form	2009-01-04 15:14:42 -05:00
auditfilter.c	audit: validate comparison operations, store them in sane form	2009-01-04 15:14:42 -05:00
auditsc.c	make sure that filterkey of task,always rules is reported	2009-01-04 15:14:42 -05:00
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	sanitize audit_log_capset()	2009-01-04 15:14:41 -05:00
cgroup.c	mm: remove cgroup_mm_owner_callbacks	2009-01-06 15:59:01 -08:00
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	freezer_cg: disable writing freezer.state of root cgroup	2008-11-12 17:17:16 -08:00
compat.c	cpumask: convert kernel/compat.c	2009-01-01 10:12:24 +10:30
configs.c	kernel/configs.c: remove useless comments	2008-10-20 08:52:34 -07:00
cpu.c	stop_machine: introduce stop_machine_create/destroy.	2009-01-05 08:40:14 +10:30
cpuset.c	oom: print triggering task's cpuset and mems allowed	2009-01-06 15:58:59 -08:00
cred-internals.h	CRED: Inaugurate COW credentials	2008-11-14 10:39:23 +11:00
cred.c	User namespaces: set of cleanups (v2)	2008-11-24 18:57:41 -05:00
delayacct.c	schedstat: consolidate per-task cpu runtime stats	2008-12-18 13:54:01 +01:00
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	proc: move /proc/execdomains to kernel/exec_domain.c	2008-10-23 14:30:41 +04:00
exit.c	mm: introduce get_mm_hiwater_xxx(), fix taskstats->hiwater_xxx accounting	2009-01-06 15:59:09 -08:00
extable.c	Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-30 16:10:19 -08:00
fork.c	aio: make the lookup_ioctx() lockless	2008-12-29 08:29:50 +01:00
freezer.c	freezer_cg: use thaw_process() in unfreeze_cgroup()	2008-10-30 11:38:45 -07:00
futex.c	Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-30 16:10:19 -08:00
futex_compat.c	CRED: Use RCU to access another task's creds and to release a task's own creds	2008-11-14 10:39:19 +11:00
hrtimer.c	Merge branch 'irq-fixes-for-linus-4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-31 09:00:59 -08:00
itimer.c	timers: fix itimer/many thread hang	2008-09-14 16:25:35 +02:00
kallsyms.c	allow stripping of generated symbols under CONFIG_KALLSYMS_ALL	2008-12-19 22:47:10 +01:00
kexec.c	cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits.: core	2009-01-01 10:12:15 +10:30
kfifo.c	…
kgdb.c	kgdb: call touch_softlockup_watchdog on resume	2008-10-06 13:50:59 -05:00
kmod.c	CRED: Inaugurate COW credentials	2008-11-14 10:39:23 +11:00
kprobes.c	kernel/kprobes.c: don't pad kretprobe_table_locks[] on uniprocessor builds	2008-11-12 17:17:17 -08:00
ksysfs.c	profiling: dynamically enable readprofile at runtime	2008-10-16 11:21:31 -07:00
kthread.c	tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()	2008-11-16 09:01:36 +01:00
latencytop.c	KSYM_SYMBOL_LEN fixes	2008-12-10 08:01:54 -08:00
lockdep.c	Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-30 16:10:19 -08:00
lockdep_internals.h	lockdep: build fix	2008-08-13 12:55:10 +02:00
lockdep_proc.c	lockstat: contend with points	2008-10-20 15:43:10 +02:00
marker.c	markers/tracpoints: fix non-modular build	2008-11-16 09:52:03 +01:00
module.c	module: convert to stop_machine_create/destroy.	2009-01-05 08:40:15 +10:30
mutex-debug.c	mutex-debug: check mutex magic before owner	2008-05-16 16:53:35 +02:00
mutex-debug.h	…
mutex.c	mutex: __used is needed for function referenced only from inline asm	2008-11-24 10:00:28 +01:00
mutex.h	…
notifier.c	Merge commit 'v2.6.28-rc6' into core/debug	2008-11-26 08:22:50 +01:00
ns_cgroup.c	cgroup_clone: use pid of newly created task for new cgroup	2008-07-25 10:53:37 -07:00
nsproxy.c	User namespaces: set of cleanups (v2)	2008-11-24 18:57:41 -05:00
panic.c	Merge branch 'core/debug' into core/core	2008-12-25 13:53:11 +01:00
params.c	Fix compile warning in kernel/params.c	2008-10-23 12:09:00 -07:00
pid.c	pidns: remove now unused find_pid function.	2008-07-25 10:53:45 -07:00
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	Merge commit 'v2.6.28' into core/core	2008-12-25 13:51:46 +01:00
posix-timers.c	Merge branches 'timers/clocksource', 'timers/hpet', 'timers/hrtimers', 'timers/nohz', 'timers/ntp', 'timers/posixtimers' and 'timers/rtc' into timers/core	2008-12-25 18:02:25 +01:00
printk.c	printk: fix discarding message when recursion_bug	2008-12-19 22:52:47 +01:00
profile.c	cpumask: convert kernel/profile.c	2009-01-01 10:12:27 +10:30
ptrace.c	Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-28 12:21:10 -08:00
rcuclassic.c	cpumask: convert RCU implementations, fix	2009-01-03 18:59:25 +01:00
rcupdate.c	rcupdate: fix bug of rcu_barrier*()	2008-10-21 15:59:53 +02:00
rcupreempt.c	cpumask: convert RCU implementations	2009-01-01 10:12:26 +10:30
rcupreempt_trace.c	"Tree RCU": scalable classic RCU implementation	2008-12-18 21:56:04 +01:00
rcutorture.c	cpumask: convert RCU implementations	2009-01-01 10:12:26 +10:30
rcutree.c	"Tree RCU": scalable classic RCU implementation	2008-12-18 21:56:04 +01:00
rcutree_trace.c	"Tree RCU": scalable classic RCU implementation	2008-12-18 21:56:04 +01:00
relay.c	relayfs: fix infinite loop with splice()	2008-12-10 08:01:52 -08:00
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	resources: skip sanity check of busy resources	2008-12-16 23:30:49 +01:00
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: convert kernel/* to the new hrtimer apis	2008-09-05 21:35:13 -07:00
rtmutex.h	…
rtmutex_common.h	Don't operate with pid_t in rtmutex tester	2008-02-08 09:22:41 -08:00
rwsem.c	…
sched.c	Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-01-03 12:04:39 -08:00
sched_clock.c	Revert "sched_clock: prevent scd->clock from moving backwards"	2008-12-14 16:23:17 -08:00
sched_cpupri.c	sched: convert struct cpupri_vec cpumask_var_t.	2008-11-24 17:52:22 +01:00
sched_cpupri.h	sched: convert struct cpupri_vec cpumask_var_t.	2008-11-24 17:52:22 +01:00
sched_debug.c	sched: add uid information to sched_debug for CONFIG_USER_SCHED	2008-12-01 20:39:50 +01:00
sched_fair.c	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask	2009-01-03 18:53:31 +01:00
sched_features.h	sched: backward looking buddy	2008-11-05 10:30:14 +01:00
sched_idletask.c	sched: add CONFIG_SMP consistency	2008-10-22 10:01:52 +02:00
sched_rt.c	sched: put back some stack hog changes that were undone in kernel/sched.c	2009-01-03 19:00:09 +01:00
sched_stats.h	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask	2009-01-03 18:53:31 +01:00
seccomp.c	…
semaphore.c	semaphore: __down_common: use signal_pending_state()	2008-08-05 14:33:47 -07:00
signal.c	Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-28 12:21:10 -08:00
smp.c	cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits.: core	2009-01-01 10:12:15 +10:30
softirq.c	Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-01-03 12:04:39 -08:00
softlockup.c	cpumask: convert rest of files in kernel/	2009-01-01 10:12:28 +10:30
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: provide save_stack_trace_tsk() weak alias	2008-12-25 11:44:43 +01:00
stop_machine.c	stop_machine: introduce stop_machine_create/destroy.	2009-01-05 08:40:14 +10:30
sys.c	Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-30 16:10:19 -08:00
sys_ni.c	reintroduce accept4	2008-11-19 18:49:57 -08:00
sysctl.c	mm: add dirty_background_bytes and dirty_bytes sysctls	2009-01-06 15:59:03 -08:00
sysctl_check.c	[XFS] remove restricted chown parameter from xfs linux	2008-10-30 18:30:09 +11:00
taskstats.c	cpumask: convert rest of files in kernel/	2009-01-01 10:12:28 +10:30
test_kprobes.c	kprobes: kretprobe user entry-handler	2008-02-06 10:41:11 -08:00
time.c	select: add a timespec_add_safe() function	2008-09-05 21:34:57 -07:00
timeconst.pl	Make constants in kernel/timeconst.h fixed 64 bits	2008-05-02 16:18:42 -07:00
timer.c	[PATCH] idle cputime accounting	2008-12-31 15:11:46 +01:00
tracepoint.c	markers/tracpoints: fix non-modular build	2008-11-16 09:52:03 +01:00
tsacct.c	mm: introduce get_mm_hiwater_xxx(), fix taskstats->hiwater_xxx accounting	2009-01-06 15:59:09 -08:00
uid16.c	CRED: Wrap current->cred and a few other accessors	2008-11-14 10:39:18 +11:00
user.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-28 12:27:58 -08:00
user_namespace.c	User namespaces: set of cleanups (v2)	2008-11-24 18:57:41 -05:00
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	cpumask: convert kernel/workqueue.c	2009-01-01 10:12:25 +10:30