Luca Abeni 23e71d8ba4 sched/deadline: Implement fallback mechanism for !fit case ... When a task has a runtime that cannot be served within the scheduling deadline by any of the idle CPU (later_mask) the task is doomed to miss its deadline. This can happen since the SCHED_DEADLINE admission control guarantees only bounded tardiness and not the hard respect of all deadlines. In this case try to select the idle CPU with the largest CPU capacity to minimize tardiness. Favor task_cpu(p) if it has max capacity of !fitting CPUs so that find_later_rq() can potentially still return it (most likely cache-hot) early. Signed-off-by: Luca Abeni <luca.abeni@santannapisa.it> Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Juri Lelli <juri.lelli@redhat.com> Link: https://lkml.kernel.org/r/20200520134243.19352-6-dietmar.eggemann@arm.com		2020-06-15 14:10:05 +02:00
..
bpf	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-06-13 16:27:13 -07:00
cgroup	mmap locking API: convert mmap_sem comments	2020-06-09 09:39:14 -07:00
configs	compiler: remove CONFIG_OPTIMIZE_INLINING entirely	2020-04-07 10:43:42 -07:00
debug	kernel: rename show_stack_loglvl() => show_stack()	2020-06-09 09:39:13 -07:00
dma	dma-mapping updates for 5.8, part 1	2020-06-06 11:43:23 -07:00
events	Merge branch 'akpm' (patches from Andrew)	2020-06-09 09:54:46 -07:00
gcov	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
irq	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
kcsan	kcsan: Support distinguishing volatile accesses	2020-06-11 20:04:01 +02:00
livepatch	livepatch: Make klp_apply_object_relocs static	2020-05-11 00:31:38 +02:00
locking	The X86 entry, exception and interrupt code rework	2020-06-13 10:05:47 -07:00
power	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
printk	One more printk change for 5.8	2020-06-12 12:13:36 -07:00
rcu	TTY/Serial driver updates for 5.8-rc1	2020-06-07 09:52:36 -07:00
sched	sched/deadline: Implement fallback mechanism for !fit case	2020-06-15 14:10:05 +02:00
time	The X86 entry, exception and interrupt code rework	2020-06-13 10:05:47 -07:00
trace	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-06-13 16:27:13 -07:00
.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
acct.c	mmap locking API: convert mmap_sem comments	2020-06-09 09:39:14 -07:00
async.c
audit_fsnotify.c	fsnotify: use helpers to access data by data_type	2020-03-23 18:19:06 +01:00
audit_tree.c
audit_watch.c	\n	2020-04-06 08:58:42 -07:00
audit.c	audit/stable-5.8 PR 20200601	2020-06-02 17:13:37 -07:00
audit.h	audit: fix a net reference leak in audit_list_rules_send()	2020-04-22 15:23:10 -04:00
auditfilter.c	audit: fix a net reference leak in audit_list_rules_send()	2020-04-22 15:23:10 -04:00
auditsc.c	audit: add subj creds to NETFILTER_CFG record to	2020-05-20 18:09:19 -04:00
backtracetest.c
bounds.c
capability.c
compat.c	uaccess: Selectively open read or write user access	2020-05-01 12:35:21 +10:00
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	kernel/cpu_pm: Fix uninitted local in cpu_pm	2020-05-15 11:44:34 -07:00
cpu.c	The changes in this cycle are:	2020-06-03 13:06:42 -07:00
crash_core.c
crash_dump.c	crash_dump: Remove no longer used saved_max_pfn	2020-04-15 11:21:54 +02:00
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	mmap locking API: convert mmap_sem comments	2020-06-09 09:39:14 -07:00
extable.c	kernel/extable.c: use address-of operator on section symbols	2020-04-07 10:43:42 -07:00
fail_function.c
fork.c	mmap locking API: convert nested write lock sites	2020-06-09 09:39:14 -07:00
freezer.c
futex.c	mmap locking API: use coccinelle to convert mmap_sem rwsem call sites	2020-06-09 09:39:14 -07:00
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	kallsyms: unexport kallsyms_lookup_name() and kallsyms_on_each_symbol()	2020-04-07 10:43:44 -07:00
kcmp.c	kernel/kcmp.c: Use new infrastructure to fix deadlocks in execve	2020-03-25 10:04:01 -05:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: check kcov_softirq in kcov_remote_stop()	2020-06-10 19:14:17 -07:00
kexec_core.c
kexec_elf.c
kexec_file.c	kexec_file: don't place kexec images on IORESOURCE_MEM_DRIVER_MANAGED	2020-06-04 19:06:23 -07:00
kexec_internal.h
kexec.c
kheaders.c
kmod.c	kmod: make request_module() return an error when autoloading is disabled	2020-04-10 15:36:22 -07:00
kprobes.c	kernel/kprobes.c: convert to use DEFINE_SEQ_ATTRIBUTE macro	2020-06-04 19:06:26 -07:00
ksysfs.c
kthread.c	isolcpus: Affine unbound kernel threads to housekeeping cpus	2020-06-15 14:10:03 +02:00
latencytop.c	sysctl: pass kernel pointers to ->proc_handler	2020-04-27 02:07:40 -04:00
Makefile	Notifications over pipes + Keyring notifications	2020-06-13 09:56:21 -07:00
module_signature.c
module_signing.c
module-internal.h
module.c	module: move the set_fs hack for flush_icache_range to m68k	2020-06-08 11:05:58 -07:00
notifier.c	mm: remove vmalloc_sync_(un)mappings()	2020-06-02 10:59:12 -07:00
nsproxy.c	nsproxy: attach to namespaces via pidfds	2020-05-13 11:41:22 +02:00
padata.c	padata: add basic support for multithreaded jobs	2020-06-03 20:09:45 -07:00
panic.c	bug: Annotate WARN/BUG/stackfail as noinstr safe	2020-06-11 15:14:36 +02:00
params.c
pid_namespace.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next	2020-06-03 16:27:18 -07:00
pid.c	remove the no longer needed pid_alive() check in __task_pid_nr_ns()	2020-04-30 06:40:14 -05:00
profile.c
ptrace.c
range.c
reboot.c	printk: Collapse shutdown types into a single dump reason	2020-05-30 10:34:03 -07:00
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	scs: Report SCS usage in bytes rather than number of entries	2020-06-04 16:14:56 +01:00
seccomp.c	sysctl: pass kernel pointers to ->proc_handler	2020-04-27 02:07:40 -04:00
signal.c	Merge branch 'work.set_fs-exec' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2020-06-01 16:21:46 -07:00
smp.c	The changes in this cycle are:	2020-06-03 13:06:42 -07:00
smpboot.c
smpboot.h
softirq.c	x86/entry: Clarify irq_{enter,exit}_rcu()	2020-06-11 15:15:24 +02:00
stackleak.c
stacktrace.c
stop_machine.c
sys_ni.c
sys.c	Add additional LSM hooks for SafeSetID	2020-06-14 11:39:31 -07:00
sysctl_binary.c
sysctl-test.c
sysctl.c	sched/deadline: Impose global limits on sched_attr::sched_period	2020-06-15 14:10:04 +02:00
task_work.c
taskstats.c
test_kprobes.c
torture.c	CPU (hotplug) updates:	2020-03-30 18:06:39 -07:00
tracepoint.c
tsacct.c
ucount.c	ucount: Make sure ucounts in /proc/sys/user don't regress again	2020-04-07 21:51:27 +02:00
uid16.c
uid16.h
umh.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-05-15 13:48:59 -07:00
up.c
user_namespace.c	nsproxy: add struct nsset	2020-05-09 13:57:12 +02:00
user-return-notifier.c
user.c	user.c: make uidhash_table static	2020-06-04 19:06:24 -07:00
utsname_sysctl.c	sysctl: pass kernel pointers to ->proc_handler	2020-04-27 02:07:40 -04:00
utsname.c	nsproxy: add struct nsset	2020-05-09 13:57:12 +02:00
watch_queue.c	Notifications over pipes + Keyring notifications	2020-06-13 09:56:21 -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	workqueue: use BUILD_BUG_ON() for compile time test instead of WARN_ON()	2020-06-01 11:02:42 -04:00