Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Vincent Guittot 2d935df7b2 sched/fair: Fix insertion in rq->leaf_cfs_rq_list ... commit f6783319737f28e4436a69611853a5a098cbe974 upstream. Sargun reported a crash: "I picked up c40f7d74c741a907cfaeb73a7697081881c497d0 sched/fair: Fix infinite loop in update_blocked_averages() by reverting a9e7f6544b and put it on top of 4.19.13. In addition to this, I uninlined list_add_leaf_cfs_rq for debugging. This revealed a new bug that we didn't get to because we kept getting crashes from the previous issue. When we are running with cgroups that are rapidly changing, with CFS bandwidth control, and in addition using the cpusets cgroup, we see this crash. Specifically, it seems to occur with cgroups that are throttled and we change the allowed cpuset." The algorithm used to order cfs_rq in rq->leaf_cfs_rq_list assumes that it will walk down to root the 1st time a cfs_rq is used and we will finish to add either a cfs_rq without parent or a cfs_rq with a parent that is already on the list. But this is not always true in presence of throttling. Because a cfs_rq can be throttled even if it has never been used but other CPUs of the cgroup have already used all the bandwdith, we are not sure to go down to the root and add all cfs_rq in the list. Ensure that all cfs_rq will be added in the list even if they are throttled. [ mingo: Fix !CGROUPS build. ] Reported-by: Sargun Dhillon <sargun@sargun.me> Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: tj@kernel.org Fixes: 9c2791f936 ("Fix hierarchical order in rq->leaf_cfs_rq_list") Link: https://lkml.kernel.org/r/1548825767-10799-1-git-send-email-vincent.guittot@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Janne Huttunen <janne.huttunen@nokia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-02-01 09:37:10 +00:00
..
bpf	bpf, offload: Unlock on error in bpf_offload_dev_create()	2020-01-27 14:51:20 +01:00
cgroup	cgroup: pids: use atomic64_t for pids->limit	2019-12-17 20:34:56 +01:00
configs	kconfig: tinyconfig: remove stale stack protector fixups	2018-06-15 07:15:28 +09:00
debug	kdb: do a sanity check on the cpu in kdb_per_cpu()	2020-01-27 14:50:48 +01:00
dma	dma-debug: add a schedule point in debug_dma_dump_mappings()	2020-01-04 19:12:43 +01:00
events	perf/ioctl: Add check for the sample_period value	2020-01-27 14:50:57 +01:00
gcov	gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT	2018-06-08 18:56:02 +09:00
irq	irqdomain: Add the missing assignment of domain->fwnode for named fwnode	2020-01-27 14:51:09 +01:00
livepatch	livepatch: Nullify obj->mod in klp_module_coming()'s error path	2019-10-07 18:57:10 +02:00
locking	locking/spinlock/debug: Fix various data races	2020-01-12 12:17:05 +01:00
power	PM / hibernate: memory_bm_find_bit(): Tighten node optimisation	2020-01-09 10:18:58 +01:00
printk	printk: fix integer overflow in setup_log_buf()	2019-12-01 09:16:14 +01:00
rcu	rcuperf: Fix cleanup path for invalid perf_type strings	2019-05-31 06:46:30 -07:00
sched	sched/fair: Fix insertion in rq->leaf_cfs_rq_list	2020-02-01 09:37:10 +00:00
time	tick/sched: Annotate lockless access to last_jiffies_update	2020-01-23 08:21:37 +01:00
trace	tracing: Fix histogram code when expression has same var as value	2020-01-29 16:43:23 +01:00
.gitignore
acct.c	acct_on(): don't mess with freeze protection	2019-05-31 06:46:05 -07:00
async.c	kernel/async.c: revert "async: simplify lowest_in_progress()"	2018-02-06 18:32:44 -08:00
audit.c	audit: use ktime_get_coarse_real_ts64() for timestamps	2018-07-17 14:45:08 -04:00
audit.h	audit: track the owner of the command mutex ourselves	2018-02-23 11:22:22 -05:00
audit_fsnotify.c	fsnotify: add fsnotify_add_inode_mark() wrappers	2018-05-18 14:58:22 +02:00
audit_tree.c	audit: Embed key into chunk	2019-12-13 08:51:11 +01:00
audit_watch.c	audit_get_nd(): don't unlock parent too early	2019-12-13 08:51:02 +01:00
auditfilter.c	audit: fix a memory leak bug	2019-05-31 06:46:17 -07:00
auditsc.c	audit: print empty EXECVE args	2019-12-01 09:17:17 +01:00
backtracetest.c
bounds.c	kbuild: fix kernel/bounds.c 'W=1' warning	2018-11-13 11:08:47 -08:00
capability.c	LSM: generalize flag passing to security_capable	2020-01-23 08:21:29 +01:00
compat.c	time: Enable get/put_compat_itimerspec64 always	2018-06-24 14:39:47 +02:00
configs.c
context_tracking.c
cpu.c	cpu/SMT: State SMT is disabled even with nosmt and without "=force"	2019-11-24 08:20:18 +01:00
cpu_pm.c
crash_core.c	kernel/crash_core.c: print timestamp using time64_t	2018-08-22 10:52:47 -07:00
crash_dump.c
cred.c	memcg: account security cred as well to kmemcg	2020-01-09 10:19:00 +01:00
delayacct.c	delayacct: Use raw_spinlocks	2018-04-27 14:34:51 +02:00
dma.c	proc: introduce proc_create_single{,_data}	2018-05-16 07:23:35 +02:00
elfcore.c	kernel/elfcore.c: include proper prototypes	2019-10-11 18:21:23 +02:00
exec_domain.c	proc: introduce proc_create_single{,_data}	2018-05-16 07:23:35 +02:00
exit.c	exit: panic before exit_mm() on global init exit	2020-01-09 10:19:02 +01:00
extable.c	extable: Make init_kernel_text() global	2018-02-21 16:54:06 +01:00
fail_function.c	bpf/error-inject/kprobes: Clear current_kprobe and enable preempt in kprobe	2018-06-21 12:33:19 +02:00
fork.c	fork,memcg: alloc_thread_stack_node needs to set tsk->stack	2020-01-27 14:50:58 +01:00
freezer.c	PM / reboot: Eliminate race between reboot and suspend	2018-08-06 12:35:20 +02:00
futex.c	futex: Prevent robust futex exit race	2019-12-01 09:17:38 +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	kernel: hung_task.c: disable on suspend	2019-04-20 09:16:02 +02:00
iomem.c	memremap: split devm_memremap_pages() and memremap() infrastructure	2018-05-15 23:08:33 -07:00
irq_work.c	irq_work: Do not raise an IPI when queueing work on the local CPU	2019-05-31 06:46:19 -07:00
jump_label.c	jump_label: move 'asm goto' support test to Kconfig	2019-06-04 08:02:34 +02:00
kallsyms.c	kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol	2019-09-21 07:17:02 +02:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt	kconfig: include kernel/Kconfig.preempt from init/Kconfig	2018-08-02 08:06:54 +09:00
kcov.c	kernel/kcov.c: mark write_comp_data() as notrace	2019-02-12 19:47:20 +01:00
kexec.c	kexec: add call to LSM hook in original kexec_load syscall	2018-07-16 12:31:57 -07:00
kexec_core.c	kexec: Allocate decrypted control pages for kdump if SME is enabled	2019-11-24 08:20:29 +01:00
kexec_file.c	treewide: Use array_size() in vzalloc()	2018-06-12 16:19:22 -07:00
kexec_internal.h
kmod.c
kprobes.c	kprobes: Blacklist symbols in arch-defined prohibited area	2019-12-05 09:20:26 +01:00
ksysfs.c
kthread.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-08-13 11:25:07 -07:00
latencytop.c
Makefile	y2038: futex: Move compat implementation into futex.c	2019-12-01 09:17:38 +01:00
memremap.c	mm/memory_hotplug: shrink zones when offlining memory	2020-01-29 16:43:27 +01:00
module-internal.h	modsign: log module name in the event of an error	2018-07-02 11:36:17 +02:00
module.c	kernel/module.c: wakeup processes in module_wq on module unload	2019-12-17 20:35:57 +01:00
module_signing.c	modsign: log module name in the event of an error	2018-07-02 11:36:17 +02:00
notifier.c
nsproxy.c
padata.c	padata: use smp_mb in padata_reorder to avoid orphaned padata jobs	2019-07-26 09:14:25 +02:00
panic.c	kernel/panic.c: do not append newline to the stack protector panic string	2019-12-01 09:17:10 +01:00
params.c	kernel/params.c: downgrade warning for unsafe parameters	2018-04-11 10:28:37 -07:00
pid.c	Fix failure path in alloc_pid()	2019-01-13 09:51:06 +01:00
pid_namespace.c	signal/pid_namespace: Fix reboot_pid_ns to use send_sig not force_sig	2019-07-26 09:14:01 +02:00
profile.c
ptrace.c	ptrace: reintroduce usage of subjective credentials in ptrace_has_cap()	2020-01-23 08:21:29 +01:00
range.c
reboot.c	PM / reboot: Eliminate race between reboot and suspend	2018-08-06 12:35:20 +02:00
relay.c	relay: check return of create_buf_file() properly	2019-03-13 14:02:35 -07:00
resource.c	resource: fix locking in find_next_iomem_res()	2019-09-16 08:22:20 +02:00
rseq.c	rseq: uapi: Declare rseq_cs field as union, update includes	2018-07-10 22:18:52 +02:00
seccomp.c	LSM: generalize flag passing to security_capable	2020-01-23 08:21:29 +01:00
signal.c	signal: Allow cifs and drbd to receive their terminating signals	2020-01-27 14:51:05 +01:00
smp.c	cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM	2019-02-12 19:47:25 +01:00
smpboot.c	smpboot: Remove cpumask from the API	2018-07-03 09:20:44 +02:00
smpboot.h
softirq.c	nohz: Fix missing tick reprogram when interrupting an inline softirq	2018-08-03 15:52:10 +02:00
stacktrace.c
stop_machine.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-08-13 11:25:07 -07:00
sys.c	kernel/sys.c: prctl: fix false positive in validate_prctl_map()	2019-06-15 11:54:01 +02:00
sys_ni.c	Merge branch 'core-rseq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-06-10 10:17:09 -07:00
sysctl.c	kernel: sysctl: make drop_caches write-only	2020-01-04 19:13:17 +01:00
sysctl_binary.c	staging: irda: remove remaining remants of irda code removal	2018-04-16 11:26:49 +02:00
task_work.c	locking/barriers: Convert users of lockless_dereference() to READ_ONCE()	2017-12-17 13:57:15 +01:00
taskstats.c	taskstats: fix data-race	2020-01-09 10:18:59 +01:00
test_kprobes.c	kprobes: Remove jprobe API implementation	2018-06-21 12:33:05 +02:00
torture.c	torture: Keep old-school dmesg format	2018-06-25 11:30:10 -07:00
tracepoint.c	tracepoint: Fix tracepoint array element size mismatch	2018-10-17 15:35:29 -04:00
tsacct.c
ucount.c	headers: untangle kmemleak.h from mm.h	2018-04-05 21:36:27 -07:00
uid16.c	fs: add do_fchownat(), ksys_fchown() helpers and ksys_{,l}chown() wrappers	2018-04-02 20:15:59 +02:00
uid16.h	kernel: provide ksys_*() wrappers for syscalls called by kernel/uid16.c	2018-04-02 20:15:30 +02:00
umh.c	umh: fix race condition	2018-06-07 16:56:28 -04:00
up.c
user-return-notifier.c
user.c	userns: use irqsave variant of refcount_dec_and_lock()	2018-08-22 10:52:47 -07:00
user_namespace.c	userns: also map extents in the reverse map to kernel IDs	2018-11-13 11:09:00 -08:00
utsname.c	uts: create "struct uts_namespace" from kmem_cache	2018-04-11 10:28:35 -07:00
utsname_sysctl.c	sys: don't hold uts_sem while accessing userspace memory	2018-08-11 02:05:53 -05:00
watchdog.c	watchdog: Respect watchdog cpumask on CPU hotplug	2019-04-03 06:26:29 +02:00
watchdog_hld.c	watchdog: Mark watchdog touch functions as notrace	2018-08-30 12:56:40 +02:00
workqueue.c	workqueue: Fix missing kfree(rescuer) in destroy_workqueue()	2019-12-17 20:35:50 +01:00
workqueue_internal.h	workqueue: Set worker->desc to workqueue name by default	2018-05-18 08:47:13 -07:00