Pranith Kumar 11ed7f934c rcu: Make nocb leader kthreads process pending callbacks after spawning ... The nocb callbacks generated before the nocb kthreads are spawned are enqueued in the nocb queue for later processing. Commit fbce7497ee ("rcu: Parallelize and economize NOCB kthread wakeups") introduced nocb leader kthreads which checked the nocb_leader_wake flag to see if there were any such pending callbacks. A case was reported in which newly spawned leader kthreads were not processing the pending callbacks as this flag was not set, which led to a boot hang. The following commit ensures that the newly spawned nocb kthreads process the pending callbacks by allowing the kthreads to run immediately after spawning instead of waiting. This is done by inverting the logic of nocb_leader_wake tests to nocb_leader_sleep which allows us to use the default initialization of this flag to 0 to let the kthreads run. Reported-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Link: http://www.spinics.net/lists/kernel/msg1802899.html [ paulmck: Backported to v3.17-rc2. ] Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Tested-by: Amit Shah <amit.shah@redhat.com>		2014-08-28 05:59:59 -07:00
..
bpf	net: filter: split 'struct sk_filter' into socket and bpf parts	2014-08-02 15:03:58 -07:00
debug	kdb: Use ktime_get_ts()	2014-06-12 16:18:45 +02:00
events	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-08-24 16:16:55 -07:00
gcov	kernel/gcov/fs.c: remove unnecessary null test before debugfs_remove	2014-08-08 15:57:24 -07:00
irq	Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-08-05 17:38:45 -07:00
locking	arch, locking: Ciao arch_mutex_cpu_relax()	2014-07-17 12:32:47 +02:00
power	Merge branches 'pm-sleep', 'pm-cpufreq' and 'pm-cpuidle'	2014-08-11 23:19:48 +02:00
printk	printk: Add function to return log buffer address and size	2014-08-13 15:13:44 +10:00
rcu	rcu: Make nocb leader kthreads process pending callbacks after spawning	2014-08-28 05:59:59 -07:00
sched	Merge branches 'pm-sleep', 'pm-cpufreq' and 'pm-cpuidle'	2014-08-11 23:19:48 +02:00
time	timekeeping: Another fix to the VSYSCALL_OLD update_vsyscall	2014-08-14 11:04:11 -06:00
trace	ftrace: Use current addr when converting to nop in __ftrace_replace_code()	2014-08-22 21:04:35 -04:00
.gitignore	…
Kconfig.freezer	…
Kconfig.hz	…
Kconfig.locks	locking/rwsem: Add CONFIG_RWSEM_SPIN_ON_OWNER	2014-07-16 14:57:13 +02:00
Kconfig.preempt	…
Makefile	bin2c: move bin2c in scripts/basic	2014-08-08 15:57:32 -07:00
acct.c	kernel/acct.c: fix coding style warnings and errors	2014-08-08 15:57:27 -07:00
async.c	…
audit.c	CAPABILITIES: remove undefined caps from all processes	2014-07-24 21:53:47 +10:00
audit.h	…
audit_tree.c	…
audit_watch.c	…
auditfilter.c	kernel/auditfilter.c: replace count*size kmalloc by kcalloc	2014-08-06 18:01:12 -07:00
auditsc.c	auditsc: audit_krule mask accesses need bounds checking	2014-06-10 08:44:40 -07:00
backtracetest.c	…
bounds.c	page-cgroup: get rid of NR_PCG_FLAGS	2014-08-08 15:57:18 -07:00
capability.c	CAPABILITIES: remove undefined caps from all processes	2014-07-24 21:53:47 +10:00
cgroup.c	Merge branch 'for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2014-08-04 10:11:28 -07:00
cgroup_freezer.c	cgroup: rename cgroup_subsys->base_cftypes to ->legacy_cftypes	2014-07-15 11:05:09 -04:00
compat.c	kernel/compat.c: use sizeof() instead of sizeof	2014-06-04 16:54:19 -07:00
configs.c	…
context_tracking.c	x86/kprobes: Fix build errors and blacklist context_track_user	2014-06-14 09:07:44 +02:00
cpu.c	sched: Rework check_for_tasks()	2014-07-05 11:17:45 +02:00
cpu_pm.c	…
cpuset.c	Merge branch 'for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2014-08-04 10:11:28 -07:00
crash_dump.c	…
cred.c	…
delayacct.c	delayacct: Remove braindamaged type conversions	2014-07-23 10:18:06 -07:00
dma.c	…
elfcore.c	…
exec_domain.c	…
exit.c	kernel/exit.c: fix coding style warnings and errors	2014-08-08 15:57:22 -07:00
extable.c	…
fork.c	seccomp: Replace BUG(!spin_is_locked()) with assert_spin_lock	2014-08-11 13:29:12 -07:00
freezer.c	…
futex.c	futex: Simplify futex_lock_pi_atomic() and make it more robust	2014-06-21 22:26:24 +02:00
futex_compat.c	…
groups.c	…
hung_task.c	…
irq_work.c	irq_work: Remove BUG_ON in irq_work_run()	2014-07-05 11:17:26 +02:00
jump_label.c	…
kallsyms.c	kernel/kallsyms.c: fix %pB when there's no symbol at the address	2014-08-08 15:57:18 -07:00
kcmp.c	…
kexec.c	kexec: verify the signature of signed PE bzImage	2014-08-08 15:57:33 -07:00
kmod.c	signals: change wait_for_helper() to use kernel_sigaction()	2014-06-06 16:08:12 -07:00
kprobes.c	kprobes: Skip kretprobe hit in NMI context to avoid deadlock	2014-08-08 10:38:04 +02:00
ksysfs.c	…
kthread.c	kthread_work: wake up worker only when the worker is idle	2014-07-28 14:07:52 -04:00
latencytop.c	…
module-internal.h	…
module.c	module: Clean up ro/nx after early module load failures	2014-08-16 04:47:00 +09:30
module_signing.c	…
notifier.c	…
nsproxy.c	namespaces: Use task_lock and not rcu to protect nsproxy	2014-07-29 18:08:50 -07:00
padata.c	…
panic.c	panic: add TAINT_SOFTLOCKUP	2014-08-08 15:57:24 -07:00
params.c	Add module param type 'ullong'	2014-07-17 22:07:37 +02:00
pid.c	…
pid_namespace.c	…
profile.c	kernel/profile.c: use static const char instead of static char	2014-06-06 16:08:13 -07:00
ptrace.c	sched: Remove proliferation of wait_on_bit() action functions	2014-07-16 15:10:39 +02:00
range.c	…
reboot.c	…
relay.c	…
res_counter.c	…
resource.c	resource: provide new functions to walk through resources	2014-08-08 15:57:32 -07:00
seccomp.c	seccomp: Replace BUG(!spin_is_locked()) with assert_spin_lock	2014-08-11 13:29:12 -07:00
signal.c	Merge branch 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc	2014-08-09 09:58:12 -07:00
smp.c	kernel/smp.c:on_each_cpu_cond(): fix warning in fallback path	2014-08-06 18:01:22 -07:00
smpboot.c	…
smpboot.h	…
softirq.c	…
stacktrace.c	…
stop_machine.c	…
sys.c	sched: move no_new_privs into new atomic flags	2014-07-18 12:13:38 -07:00
sys_ni.c	kexec: new syscall kexec_file_load() declaration	2014-08-08 15:57:32 -07:00
sysctl.c	mm, hugetlb: remove hugetlb_zero and hugetlb_infinity	2014-08-06 18:01:19 -07:00
sysctl_binary.c	ipv6: Allow accepting RA from local IP addresses.	2014-07-01 12:16:24 -07:00
system_certificates.S	…
system_keyring.c	KEYS: validate certificate trust only with builtin keys	2014-07-17 09:35:17 -04:00
task_work.c	…
taskstats.c	…
test_kprobes.c	kernel/test_kprobes.c: use current logging functions	2014-08-08 15:57:18 -07:00
torture.c	torture: Avoid format string leak to thead name	2014-07-07 10:12:56 -07:00
tracepoint.c	tracing: syscall_regfunc() should not skip kernel threads	2014-06-21 00:15:26 -04:00
tsacct.c	sched: Make task->start_time nanoseconds based	2014-07-23 10:18:05 -07:00
uid16.c	…
up.c	…
user-return-notifier.c	…
user.c	…
user_namespace.c	proc: constify seq_operations	2014-08-08 15:57:22 -07:00
utsname.c	namespaces: Use task_lock and not rcu to protect nsproxy	2014-07-29 18:08:50 -07:00
utsname_sysctl.c	sysctl: convert use of typedef ctl_table to struct ctl_table	2014-06-06 16:08:16 -07:00
watchdog.c	panic: add TAINT_SOFTLOCKUP	2014-08-08 15:57:24 -07:00
workqueue.c	Merge branch 'for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2014-08-04 10:09:27 -07:00
workqueue_internal.h	…