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android_kernel_google_msm/kernel
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Eric Dumazet 1d89f42bbc rcu: Fix batch-limit size problem 
commit 878d7439d0 upstream.

Commit 29c00b4a1d (rcu: Add event-tracing for RCU callback
invocation) added a regression in rcu_do_batch()

Under stress, RCU is supposed to allow to process all items in queue,
instead of a batch of 10 items (blimit), but an integer overflow makes
the effective limit being 1.  So, unless there is frequent idle periods
(during which RCU ignores batch limits), RCU can be forced into a
state where it cannot keep up with the callback-generation rate,
eventually resulting in OOM.

This commit therefore converts a few variables in rcu_do_batch() from
int to long to fix this problem, along with the module parameters
controlling the batch limits.

Change-Id: I6d6dcb94d2a31f0cf00d3121a7b92e49aa7ab108
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-29 23:12:32 +08:00
..
debug debug: add parameters to prevent entering debug mode on errors 2012-05-18 17:03:10 -07:00
events FROMLIST: security,perf: Allow further restriction of perf_event_open 2016-06-20 19:00:29 +00:00
gcov
irq random: remove rand_initialize_irq() 2013-09-09 17:01:42 -07:00
power Power: Changes the permission to read only for sysfs file 2014-08-05 19:00:47 +00:00
sched f2fs: avoid hungtask problem caused by losing wake_up 2016-10-29 23:12:32 +08:00
time tick: Cleanup NOHZ per cpu data on cpu down 2016-10-29 23:12:18 +08:00
trace tracing/syscalls: Ignore numbers outside NR_syscalls' range 2016-10-29 23:12:11 +08:00
.gitignore kernel/hz.bc: ignore. 2016-10-29 23:12:15 +08:00
acct.c Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-01-08 12:19:57 -08:00
async.c kernel/async: remove redundant declaration. 2012-01-13 09:32:18 +10:30
audit.c constify path argument of audit_log_d_path() 2012-03-20 21:29:40 -04:00
audit.h audit: remove AUDIT_SETUP_CONTEXT as it isn't used 2012-01-17 16:16:57 -05:00
audit_tree.c VFS: Make clone_mnt()/copy_tree()/collect_mounts() return errors 2015-07-13 11:17:46 -07:00
audit_watch.c
auditfilter.c audit: allow interfield comparison in audit rules 2012-01-17 16:17:01 -05:00
auditsc.c seccomp: remove duplicated failure logging 2014-10-31 19:46:13 -07:00
backtracetest.c
bounds.c
capability.c Revert "capabitlies: ns_capable can use the cap helpers rather than lsm call" 2012-01-17 10:19:41 -08:00
cgroup.c cgroup: remove synchronize_rcu() from cgroup_attach_{task|proc}() 2014-12-01 16:09:15 -08:00
cgroup_freezer.c cgroup: remove cgroup_subsys argument from callbacks 2012-02-02 09:20:22 -08:00
compat.c compat: Fix RT signal mask corruption via sigprocmask 2012-05-10 08:58:33 -07:00
configs.c
cpu.c Move x86_64 idle notifiers to generic 2012-04-09 13:57:52 -07:00
cpu_pm.c
cpuset.c Autogenerated GPG tag for Rusty D1ADB8F1: 15EE 8D6C AB0E 7F0C F999 BFCB D920 0E6C D1AD B8F1 2012-04-02 08:53:24 -07:00
crash_dump.c
cred.c cred: copy_process() should clear child->replacement_session_keyring 2012-04-11 08:20:11 -07:00
delayacct.c
dma.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
elfcore.c
exec_domain.c
exit.c flo: Put device-specific code behind #ifndef CONFIG_UML. 2015-05-20 15:22:06 +09:00
extable.c
fork.c introduce for_each_thread() to replace the buggy while_each_thread() 2014-10-31 19:46:30 -07:00
freezer.c freezer: skip waking up tasks with PF_FREEZER_SKIP set 2013-07-12 14:22:56 -07:00
futex.c futex: Make lookup_pi_state more robust 2014-06-11 15:16:22 -07:00
futex_compat.c futex: Mark get_robust_list as deprecated 2012-03-29 11:37:17 +02:00
groups.c
hrtimer.c hrtimer: Set expiry time before switch_hrtimer_base() 2016-10-29 23:12:14 +08:00
hung_task.c hung_task: fix the broken rcu_lock_break() logic 2012-03-05 15:49:42 -08:00
irq_work.c irq_work: fix compile failure on tile from missing include 2012-04-13 13:15:16 -04:00
itimer.c itimer: Use printk_once instead of WARN_ONCE 2012-04-10 11:00:30 +02:00
jump_label.c static keys: Inline the static_key_enabled() function 2012-02-28 20:01:08 +01:00
kallsyms.c vsprintf: Fix %ps on non symbols when using kallsyms 2013-02-08 15:14:22 -08:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage 2012-03-23 13:18:57 +01:00
Kconfig.preempt locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage 2012-03-23 13:18:57 +01:00
kexec.c Merge branch 'akpm' (Andrew's patch-bomb) 2012-03-28 17:19:28 -07:00
kfifo.c
kmod.c PM / Sleep: Mitigate race between the freezer and request_firmware() 2012-03-28 23:30:28 +02:00
kprobes.c kprobes: return proper error code from register_kprobe() 2012-03-05 15:49:42 -08:00
ksysfs.c rcu: Add a module parameter to force use of expedited RCU primitives 2016-10-29 23:12:17 +08:00
kthread.c
latencytop.c
lglock.c brlocks/lglocks: turn into functions 2015-07-13 11:17:40 -07:00
lockdep.c lockdep: remove task argument from debug_check_no_locks_held 2013-07-12 14:22:56 -07:00
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
Makefile kernel: Replace timeconst.pl with a bc script 2016-10-29 23:12:15 +08:00
module.c module: Remove module size limit 2012-03-26 12:50:53 +10:30
mutex-debug.c
mutex-debug.h
mutex.c sched/rt: Use schedule_preempt_disabled() 2012-03-01 10:28:03 +01:00
mutex.h
notifier.c
nsproxy.c vfs: Add a user namespace reference from struct mnt_namespace 2015-07-13 11:17:54 -07:00
padata.c padata: Fix cpu hotplug 2012-03-29 19:52:46 +08:00
panic.c panic: resume console if panic after console suspend. 2013-09-09 17:16:14 -07:00
params.c params: <level>_initcall-like kernel parameters 2012-03-26 12:50:51 +10:30
pid.c proc: Usable inode numbers for the namespace file descriptors. 2015-07-13 11:18:01 -07:00
pid_namespace.c proc: Usable inode numbers for the namespace file descriptors. 2015-07-13 11:18:01 -07:00
posix-cpu-timers.c [S390] cputime: add sparse checking and cleanup 2011-12-15 14:56:19 +01:00
posix-timers.c
printk.c flo: Put device-specific code behind #ifndef CONFIG_UML. 2015-05-20 15:22:06 +09:00
profile.c
ptrace.c __ptrace_may_access() should not deny sub-threads 2016-10-29 23:12:26 +08:00
range.c
rcu.h rcu: Add a module parameter to force use of expedited RCU primitives 2016-10-29 23:12:17 +08:00
rcupdate.c rcu: Make exit_rcu() more precise and consolidate 2016-10-29 23:12:17 +08:00
rcutiny.c rcu: Add RCU_NONIDLE() for idle-loop RCU read-side critical sections 2012-02-21 09:06:13 -08:00
rcutiny_plugin.h rcu: Make exit_rcu() more precise and consolidate 2016-10-29 23:12:17 +08:00
rcutorture.c PTR_ERR should be called before its argument is cleared. 2012-02-21 09:06:10 -08:00
rcutree.c rcu: Fix batch-limit size problem 2016-10-29 23:12:32 +08:00
rcutree.h rcu: Make rcu_barrier() less disruptive 2016-10-29 23:12:18 +08:00
rcutree_plugin.h rcu: Precompute RCU_FAST_NO_HZ timer offsets 2016-10-29 23:12:18 +08:00
rcutree_trace.c rcu: Make rcu_barrier() less disruptive 2016-10-29 23:12:18 +08:00
relay.c relay: prevent integer overflow in relay_open() 2012-02-10 09:04:49 +01:00
res_counter.c net: introduce res_counter_charge_nofail() for socket allocations 2012-01-22 15:08:46 -05:00
resource.c kernel: Restrict permissions of /proc/iomem. 2016-06-03 11:56:04 -07:00
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c rtmutex-tester: convert sysdev_class to a regular subsystem 2011-12-14 14:54:22 -08:00
rtmutex.c Revert "rcu: Permit rt_mutex_unlock() with irqs disabled" 2011-12-11 10:33:18 -08:00
rtmutex.h
rtmutex_common.h
rwsem.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
seccomp.c seccomp: Use atomic operations that are present in kernel 3.4. 2014-10-31 19:46:31 -07:00
semaphore.c
signal.c signal, x86: add SIGSYS info and make it synchronous. 2014-10-31 19:46:15 -07:00
smp.c smp: add func to IPI cpus based on parameter func 2012-03-28 17:14:35 -07:00
softirq.c softirq: reduce latencies 2016-10-29 23:12:18 +08:00
spinlock.c locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage 2012-03-23 13:18:57 +01:00
srcu.c rcu: Call out dangers of expedited RCU primitives 2012-02-21 09:06:08 -08:00
stacktrace.c
stop_machine.c
sys.c prctl: make PR_SET_TIMERSLACK_PID pid namespace aware 2016-10-29 23:12:27 +08:00
sys_ni.c seccomp: add "seccomp" syscall 2014-10-31 19:46:27 -07:00
sysctl.c Revert "sched: add sysctl for controlling task migrations on wake" 2013-03-15 17:13:14 -07:00
sysctl_binary.c msm: 8x55: put reason for boot in procfs from SMEM 2013-02-08 15:14:28 -08:00
taskstats.c
test_kprobes.c
time.c jiffies: Fix timeval conversion to jiffies 2016-10-29 23:12:15 +08:00
timeconst.bc kernel: Replace timeconst.pl with a bc script 2016-10-29 23:12:15 +08:00
timer.c timer: Fix mod_timer_pinned() header comment 2016-10-29 23:12:18 +08:00
tracepoint.c static keys: Introduce 'struct static_key', static_key_true()/false() and static_key_slow_[inc|dec]() 2012-02-24 10:05:59 +01:00
tsacct.c [S390] cputime: add sparse checking and cleanup 2011-12-15 14:56:19 +01:00
uid16.c
up.c
user-return-notifier.c
user.c proc: Usable inode numbers for the namespace file descriptors. 2015-07-13 11:18:01 -07:00
user_namespace.c proc: Usable inode numbers for the namespace file descriptors. 2015-07-13 11:18:01 -07:00
utsname.c proc: Usable inode numbers for the namespace file descriptors. 2015-07-13 11:18:01 -07:00
utsname_sysctl.c
wait.c lockdep/waitqueues: Add better annotation 2011-12-21 10:07:39 +01:00
watchdog.c kernel/watchdog.c: add comment to watchdog() exit path 2012-03-23 16:58:32 -07:00
workqueue.c workqueue: skip nr_running sanity check in worker_enter_idle() if trustee is active 2013-03-04 12:48:24 -08:00
workqueue_sched.h