Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Thomas Gleixner 5d62c183f9 nohz: Prevent a timer interrupt storm in tick_nohz_stop_sched_tick() ... The conditions in irq_exit() to invoke tick_nohz_irq_exit() which subsequently invokes tick_nohz_stop_sched_tick() are: if ((idle_cpu(cpu) && !need_resched()) || tick_nohz_full_cpu(cpu)) If need_resched() is not set, but a timer softirq is pending then this is an indication that the softirq code punted and delegated the execution to softirqd. need_resched() is not true because the current interrupted task takes precedence over softirqd. Invoking tick_nohz_irq_exit() in this case can cause an endless loop of timer interrupts because the timer wheel contains an expired timer, but softirqs are not yet executed. So it returns an immediate expiry request, which causes the timer to fire immediately again. Lather, rinse and repeat.... Prevent that by adding a check for a pending timer soft interrupt to the conditions in tick_nohz_stop_sched_tick() which avoid calling get_next_timer_interrupt(). That keeps the tick sched timer on the tick and prevents a repetitive programming of an already expired timer. Reported-by: Sebastian Siewior <bigeasy@linutronix.d> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul McKenney <paulmck@linux.vnet.ibm.com> Cc: Anna-Maria Gleixner <anna-maria@linutronix.de> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1712272156050.2431@nanos		2017-12-29 23:13:10 +01:00
..
bpf	bpf: do not allow root to mangle valid pointers	2017-12-21 02:26:29 +01:00
cgroup	Revert "cgroup/cpuset: remove circular dependency deadlock"	2017-12-04 14:55:59 -08:00
configs
debug	kdb: Fix handling of kallsyms_symbol_next() return value	2017-12-06 16:12:43 -06:00
events	locking/barriers: Convert users of lockless_dereference() to READ_ONCE()	2017-12-17 13:57:15 +01:00
gcov	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
irq	genirq/matrix: Fix the precedence fix for real	2017-12-04 20:50:35 +01:00
livepatch	Merge branch 'for-linus' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching	2017-11-15 10:21:58 -08:00
locking	locking/lockdep: Remove the cross-release locking checks	2017-12-12 12:38:51 +01:00
power	Revert "cpuset: Make cpuset hotplug synchronous"	2017-12-04 14:41:11 -08:00
printk	remove task and stack pointer printout from oops dump	2017-12-05 08:23:20 -08:00
rcu	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-11-13 17:56:58 -08:00
sched	cpufreq: schedutil: Use idle_calls counter of the remote CPU	2017-12-28 12:26:54 +01:00
time	nohz: Prevent a timer interrupt storm in tick_nohz_stop_sched_tick()	2017-12-29 23:13:10 +01:00
trace	tracing: Fix possible double free on failure of allocating trace buffer	2017-12-27 14:21:27 -05:00
.gitignore
acct.c	Merge branch 'linus' into locking/core, to resolve conflicts	2017-11-07 10:32:44 +01:00
async.c
audit.c	Audit: remove unused audit_log_secctx function	2017-11-10 16:08:47 -05:00
audit.h	audit/stable-4.15 PR 20171113	2017-11-15 13:28:48 -08:00
audit_fsnotify.c
audit_tree.c	Merge branch 'fsnotify' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2017-11-14 14:08:20 -08:00
audit_watch.c
auditfilter.c	audit: filter PATH records keyed on filesystem magic	2017-11-10 16:08:56 -05:00
auditsc.c	audit/stable-4.15 PR 20171113	2017-11-15 13:28:48 -08:00
backtracetest.c
bounds.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
capability.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
compat.c	sched_rr_get_interval(): move compat to native, get rid of set_fs()	2017-09-20 00:30:57 -04:00
configs.c
context_tracking.c
cpu.c	timers: Reinitialize per cpu bases on hotplug	2017-12-29 23:13:09 +01:00
cpu_pm.c
crash_core.c	kdump: print a message in case parse_crashkernel_mem resulted in zero bytes	2017-11-17 16:10:03 -08:00
crash_dump.c
cred.c
delayacct.c
dma.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
elfcore.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
exec_domain.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
exit.c	arch: define weak abort()	2017-12-14 16:00:49 -08:00
extable.c	kprobes, x86/alternatives: Use text_mutex to protect smp_alt_modules	2017-11-07 12:20:09 +01:00
fork.c	Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-12-23 11:53:04 -08:00
freezer.c
futex.c	futex: futex_wake_op, fix sign_extend32 sign bits	2017-12-10 12:50:57 -08:00
futex_compat.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
groups.c	kernel: make groups_sort calling a responsibility group_info allocators	2017-12-14 16:00:49 -08:00
hung_task.c
irq_work.c	Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-11-13 17:33:11 -08:00
jump_label.c	jump_label: Invoke jump_label_test() via early_initcall()	2017-11-14 08:41:41 +01:00
kallsyms.c	kallsyms: take advantage of the new '%px' format	2017-11-29 10:30:13 -08:00
kcmp.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: fix comparison callback signature	2017-12-14 16:00:48 -08:00
kexec.c
kexec_core.c
kexec_file.c	resource: Provide resource struct in resource walk callback	2017-11-07 15:35:57 +01:00
kexec_internal.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
kmod.c	kmod: move #ifdef CONFIG_MODULES wrapper to Makefile	2017-09-08 18:26:51 -07:00
kprobes.c	kprobes: Disable the jprobes APIs	2017-10-20 11:02:29 +02:00
ksysfs.c
kthread.c	treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts	2017-11-21 16:35:54 -08:00
latencytop.c
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
memremap.c	memremap: add scheduling point to devm_memremap_pages	2017-10-03 17:54:25 -07:00
module-internal.h
module.c	kallsyms: take advantage of the new '%px' format	2017-11-29 10:30:13 -08:00
module_signing.c
notifier.c
nsproxy.c
padata.c	treewide: setup_timer() -> timer_setup()	2017-11-21 15:57:07 -08:00
panic.c	kernel/panic.c: add TAINT_AUX	2017-11-17 16:10:04 -08:00
params.c	kernel/params.c: improve STANDARD_PARAM_DEF readability	2017-10-03 17:54:26 -07:00
pid.c	pid: remove pidhash	2017-11-17 16:10:04 -08:00
pid_namespace.c	pid: remove pidhash	2017-11-17 16:10:04 -08:00
profile.c
ptrace.c
range.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
reboot.c	kernel/reboot.c: add devm_register_reboot_notifier()	2017-11-17 16:10:04 -08:00
relay.c
resource.c	x86/mm, resource: Use PAGE_KERNEL protection for ioremap of memory pages	2017-11-07 15:35:58 +01:00
seccomp.c	locking/barriers: Convert users of lockless_dereference() to READ_ONCE()	2017-12-17 13:57:15 +01:00
signal.c	Merge branch 'akpm' (patches from Andrew)	2017-11-17 16:56:17 -08:00
smp.c	smp/core: Use lockdep to assert IRQs are disabled/enabled	2017-11-08 11:13:50 +01:00
smpboot.c	watchdog/core, powerpc: Lock cpus across reconfiguration	2017-10-04 10:53:54 +02:00
smpboot.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
softirq.c	kmemcheck: rip it out	2017-11-15 18:21:05 -08:00
stacktrace.c
stop_machine.c
sys.c	arm64 updates for 4.15	2017-11-15 10:56:56 -08:00
sys_ni.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
sysctl.c	kernel/sysctl.c: code cleanups	2017-11-17 16:10:03 -08:00
sysctl_binary.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
task_work.c	locking/barriers: Convert users of lockless_dereference() to READ_ONCE()	2017-12-17 13:57:15 +01:00
taskstats.c
test_kprobes.c	kprobes: Disable the jprobes test code	2017-10-20 11:02:54 +02:00
torture.c
tracepoint.c
tsacct.c
ucount.c
uid16.c	kernel: make groups_sort calling a responsibility group_info allocators	2017-12-14 16:00:49 -08:00
umh.c	kernel/umh.c: optimize 'proc_cap_handler()'	2017-11-17 16:10:01 -08:00
up.c	smp: Avoid using two cache lines for struct call_single_data	2017-08-29 15:14:38 +02:00
user-return-notifier.c
user.c	userns: use union in {g,u}idmap struct	2017-10-31 17:22:58 -05:00
user_namespace.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2017-11-16 12:20:15 -08:00
utsname.c
utsname_sysctl.c
watchdog.c	Merge branch 'linus' into sched/core, to pick up fixes	2017-11-08 10:17:15 +01:00
watchdog_hld.c	Merge branch 'linus' into core/urgent, to pick up dependent commits	2017-11-04 08:53:04 +01:00
workqueue.c	workqueue: remove unneeded kallsyms include	2017-12-11 07:15:43 -08:00
workqueue_internal.h	Merge branch 'for-4.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2017-11-06 12:26:49 -08:00