Valentin Schneider c200191d4c sched/topology: Propagate SD_ASYM_CPUCAPACITY upwards ... We currently set this flag *only* on domains whose topology level exactly match the level where we detect asymmetry (as returned by asym_cpu_capacity_level()). This is rather problematic. Say there are two clusters in the system, one with a lone big CPU and the other with a mix of big and LITTLE CPUs (as is allowed by DynamIQ): DIE [ ] MC [ ][ ] 0 1 2 3 4 L L B B B asym_cpu_capacity_level() will figure out that the MC level is the one where all CPUs can see a CPU of max capacity, and we will thus set SD_ASYM_CPUCAPACITY at MC level for all CPUs. That lone big CPU will degenerate its MC domain, since it would be alone in there, and will end up with just a DIE domain. Since the flag was only set at MC, this CPU ends up not seeing any SD with the flag set, which is broken. Rather than clearing dflags at every topology level, clear it before entering the topology level loop. This will properly propagate upwards flags that are set starting from a certain level. Signed-off-by: Valentin Schneider <valentin.schneider@arm.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Quentin Perret <qperret@google.com> Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: https://lore.kernel.org/r/20200817113003.20802-11-valentin.schneider@arm.com		2020-08-19 10:49:49 +02:00
..
bpf	bpf: Iterate through all PT_NOTE sections when looking for build id	2020-08-12 18:14:49 -07:00
cgroup	for-5.9/block-20200802	2020-08-03 11:57:03 -07:00
configs
debug	Remove uninitialized_var() macro for v5.9-rc1	2020-08-04 13:49:43 -07:00
dma	Cleanup, SECCOMP_FILTER support, message printing fixes, and other	2020-08-15 18:50:32 -07:00
entry	entry: Correct 'noinstr' attributes	2020-07-26 15:42:20 +02:00
events	Misc fixes, an expansion of perf syscall access to CAP_PERFMON privileged tools,	2020-08-15 10:34:24 -07:00
gcov	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
irq	genirq: Unlock irq descriptor after errors	2020-08-13 09:35:59 +02:00
kcsan	Merge branch 'kcsan' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into locking/core	2020-08-01 09:26:27 +02:00
livepatch
locking	A set of locking fixes and updates:	2020-08-10 19:07:44 -07:00
power	libnvdimm for 5.9	2020-08-11 10:59:19 -07:00
printk	Printk changes for 5.9	2020-08-04 22:22:25 -07:00
rcu	rcu: kasan: record and print call_rcu() call stack	2020-08-07 11:33:28 -07:00
sched	sched/topology: Propagate SD_ASYM_CPUCAPACITY upwards	2020-08-19 10:49:49 +02:00
time	A set oftimekeeping/VDSO updates:	2020-08-14 14:26:08 -07:00
trace	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-08-13 20:03:11 -07:00
.gitignore
acct.c	mmap locking API: convert mmap_sem comments	2020-06-09 09:39:14 -07:00
async.c	treewide: Remove uninitialized_var() usage	2020-07-16 12:35:15 -07:00
audit_fsnotify.c	fsnotify: create method handle_inode_event() in fsnotify_operations	2020-07-27 23:25:50 +02:00
audit_tree.c	\n	2020-08-06 19:29:51 -07:00
audit_watch.c	fsnotify: create method handle_inode_event() in fsnotify_operations	2020-07-27 23:25:50 +02:00
audit.c	audit/stable-5.9 PR 20200803	2020-08-04 14:20:26 -07:00
audit.h	revert: 1320a4052e ("audit: trigger accompanying records when no rules present")	2020-07-29 10:00:36 -04:00
auditfilter.c
auditsc.c	audit/stable-5.9 PR 20200803	2020-08-04 14:20:26 -07:00
backtracetest.c	treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD()	2020-07-30 11:15:58 -07:00
bounds.c
capability.c
compat.c
configs.c
context_tracking.c	context_tracking: Ensure that the critical path cannot be instrumented	2020-06-11 15:14:36 +02:00
cpu_pm.c
cpu.c	The changes in this cycle are:	2020-06-03 13:06:42 -07:00
crash_core.c	kdump: append kernel build-id string to VMCOREINFO	2020-08-12 10:58:01 -07:00
crash_dump.c
cred.c	exec: Teach prepare_exec_creds how exec treats uids & gids	2020-05-20 14:44:21 -05:00
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c	kernel: add a kernel_wait helper	2020-08-12 10:57:59 -07:00
extable.c
fail_function.c
fork.c	A set of locking fixes and updates:	2020-08-10 19:07:44 -07:00
freezer.c
futex.c	futex: Convert to use the preferred 'fallthrough' macro	2020-08-13 21:02:12 +02:00
gen_kheaders.sh	kbuild: add variables for compression tools	2020-06-06 23:42:01 +09:00
groups.c	mm: remove the pgprot argument to __vmalloc	2020-06-02 10:59:11 -07:00
hung_task.c	kernel/hung_task.c: introduce sysctl to print all traces when a hung task is detected	2020-06-08 11:05:56 -07:00
iomem.c
irq_work.c	irq_work, smp: Allow irq_work on call_single_queue	2020-05-28 10:54:15 +02:00
jump_label.c
kallsyms.c	Linux 5.8-rc7	2020-07-28 13:18:01 +02:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: make some symbols static	2020-08-12 10:58:02 -07:00
kexec_core.c
kexec_elf.c
kexec_file.c	Misc fixes and small updates all around the place:	2020-08-15 10:38:03 -07:00
kexec_internal.h
kexec.c
kheaders.c
kmod.c	kmod: remove redundant "be an" in the comment	2020-08-12 10:58:01 -07:00
kprobes.c	Tracing updates for 5.9	2020-08-07 18:29:15 -07:00
ksysfs.c
kthread.c	uaccess: add force_uaccess_{begin,end} helpers	2020-08-12 10:57:59 -07:00
latencytop.c
Makefile	all arch: remove system call sys_sysctl	2020-08-14 19:56:56 -07:00
module_signature.c
module_signing.c
module-internal.h
module.c	Modules updates for v5.9	2020-08-14 11:07:02 -07:00
notifier.c	mm: remove vmalloc_sync_(un)mappings()	2020-06-02 10:59:12 -07:00
nsproxy.c	nsproxy: support CLONE_NEWTIME with setns()	2020-07-08 11:14:22 +02:00
padata.c	padata: remove padata_parallel_queue	2020-07-23 17:34:18 +10:00
panic.c	panic: make print_oops_end_marker() static	2020-08-12 10:58:02 -07:00
params.c
pid_namespace.c	pid_namespace: use checkpoint_restore_ns_capable() for ns_last_pid	2020-07-19 20:14:42 +02:00
pid.c	cap-checkpoint-restore-v5.9	2020-08-04 15:02:07 -07:00
profile.c
ptrace.c
range.c
reboot.c	arch: remove unicore32 port	2020-07-01 12:09:13 +03:00
regset.c	regset: kill ->get()	2020-07-27 14:31:12 -04:00
relay.c	mmap locking API: convert mmap_sem comments	2020-06-09 09:39:14 -07:00
resource.c	/dev/mem: Revoke mappings when a driver claims the region	2020-05-27 11:10:05 +02:00
rseq.c
scs.c	mm: memcontrol: account kernel stack per node	2020-08-07 11:33:25 -07:00
seccomp.c	seccomp: Introduce addfd ioctl to seccomp user notifier	2020-07-14 16:29:42 -07:00
signal.c	task_work: only grab task signal lock when needed	2020-08-13 09:01:38 -06:00
smp.c	smp: Fix a potential usage of stale nr_cpus	2020-07-22 10:22:04 +02:00
smpboot.c
smpboot.h
softirq.c	tasklets API update for v5.9-rc1	2020-08-04 13:40:35 -07:00
stackleak.c	gcc-plugins/stackleak: Use asm instrumentation to avoid useless register saving	2020-06-24 07:48:28 -07:00
stacktrace.c	uaccess: add force_uaccess_{begin,end} helpers	2020-08-12 10:57:59 -07:00
stop_machine.c
sys_ni.c	all arch: remove system call sys_sysctl	2020-08-14 19:56:56 -07:00
sys.c	prctl: exe link permission error changed from -EINVAL to -EPERM	2020-07-19 20:14:42 +02:00
sysctl-test.c
sysctl.c	mm: use unsigned types for fragmentation score	2020-08-12 10:57:56 -07:00
task_work.c	task_work: only grab task signal lock when needed	2020-08-13 09:01:38 -06:00
taskstats.c
test_kprobes.c
torture.c	torture: Dump ftrace at shutdown only if requested	2020-06-29 12:01:45 -07:00
tracepoint.c
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c	kernel: add a kernel_wait helper	2020-08-12 10:57:59 -07:00
up.c
user_namespace.c
user-return-notifier.c
user.c	user.c: make uidhash_table static	2020-06-04 19:06:24 -07:00
usermode_driver.c	umd: Stop using split_argv	2020-07-07 11:58:59 -05:00
utsname_sysctl.c
utsname.c
watch_queue.c	watch_queue: Limit the number of watches a user can hold	2020-08-17 09:39:18 -07:00
watchdog_hld.c
watchdog.c	kernel/watchdog.c: convert {soft/hard}lockup boot parameters to sysctl aliases	2020-06-08 11:05:56 -07:00
workqueue_internal.h
workqueue.c	maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault	2020-06-17 10:57:41 -07:00