Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Xunlei Pang fec148c000 sched/deadline: Fix a bug in dl_overflow() ... I got a minus(very big) dl_b->total_bw during my deadline tests. # grep dl /proc/sched_debug dl_rq[0]: .dl_nr_running : 0 .dl_bw->bw : 996147 .dl_bw->total_bw : -222297900 Something unusual must have happened. After some digging, I finally noticed that when changing a deadline task to normal(cfs), and changing it back to deadline immediately, after it died, we will got the wrong dl_bw->total_bw. The root cause is in dl_overflow(), it has: if (new_bw == p->dl.dl_bw) return 0; 1) When a deadline task is changed to !deadline task, it will start dl timer in switched_from_dl(), and retain previous deadline parameter till the timer expires. 2) If we change it back to deadline with the same bandwidth parameter before the timer expires, as it keeps the old bandwidth although it is not a deadline task. dl_overflow() simply returns success without updating the right data, and got the wrong dl_bw->total_bw. The solution is simple, if @p is not deadline, don't return. Signed-off-by: Xunlei Pang <xlpang@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Juri Lelli <juri.lelli@arm.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1460636368-1993-1-git-send-email-xlpang@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>		2016-04-23 14:20:43 +02:00
..
bpf	bpf: add missing map_flags to bpf_map_show_fdinfo	2016-03-25 11:36:41 -04:00
configs
debug	mm/init: Add 'rodata=off' boot cmdline parameter to disable read-only kernel mappings	2016-02-22 08:51:37 +01:00
events	Merge branch 'PAGE_CACHE_SIZE-removal'	2016-04-04 10:50:24 -07:00
gcov	gcov: use within_module() helper.	2015-12-04 22:46:25 +01:00
irq	kernel/...: convert pr_warning to pr_warn	2016-03-22 15:36:02 -07:00
livepatch	livepatch/module: remove livepatch module notifier	2016-03-17 09:45:10 +01:00
locking	locking/lockdep: Fix print_collision() unused warning	2016-04-04 11:41:34 +02:00
power	Power management and ACPI material for v4.6-rc1, part 2	2016-03-24 22:59:58 -07:00
printk	printk: add clear_idx symbol to vmcoreinfo	2016-03-17 15:09:34 -07:00
rcu	kernel: add kcov code coverage	2016-03-22 15:36:02 -07:00
sched	sched/deadline: Fix a bug in dl_overflow()	2016-04-23 14:20:43 +02:00
time	sched/fair: Correctly handle nohz ticks CPU load accounting	2016-04-23 14:20:42 +02:00
trace	arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections	2016-03-25 16:37:42 -07:00
.gitignore
acct.c
async.c	async: export current_is_async()	2015-11-19 17:51:48 +01:00
audit.c	Merge branch 'stable-4.6' of git://git.infradead.org/users/pcmoore/audit	2016-03-19 17:52:49 -07:00
audit.h	security: Make inode argument of inode_getsecid non-const	2015-12-24 11:09:39 -05:00
audit_fsnotify.c	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
audit_tree.c	audit: audit_tree_match can be boolean	2015-11-04 08:23:51 -05:00
audit_watch.c	Merge branch 'stable-4.6' of git://git.infradead.org/users/pcmoore/audit	2016-03-19 17:52:49 -07:00
auditfilter.c	audit: Fix typo in comment	2016-02-08 11:25:39 -05:00
auditsc.c	auditsc: for seccomp events, log syscall compat state using in_compat_syscall	2016-03-22 15:36:02 -07:00
backtracetest.c
bounds.c
capability.c
cgroup.c	Merge branch 'for-4.6-ns' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2016-03-21 10:05:13 -07:00
cgroup_freezer.c	cgroup: kill cgrp_ss_priv[CGROUP_CANFORK_COUNT] and friends	2015-12-03 10:24:08 -05:00
cgroup_pids.c	cgroup_pids: fix a typo.	2015-12-14 14:54:37 -05:00
compat.c
configs.c
context_tracking.c	context_tracking: Switch to new static_branch API	2015-11-24 09:56:43 +01:00
cpu.c	cpu/hotplug: Document states better	2016-03-12 20:57:38 +01:00
cpu_pm.c
cpuset.c	Merge branch 'for-4.6-ns' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2016-03-21 10:05:13 -07:00
crash_dump.c
cred.c	kmemcg: account certain kmem allocations to memcg	2016-01-14 16:00:49 -08:00
delayacct.c	kmemcg: account certain kmem allocations to memcg	2016-01-14 16:00:49 -08:00
dma.c
elfcore.c
exec_domain.c
exit.c	oom: clear TIF_MEMDIE after oom_reaper managed to unmap the address space	2016-03-25 16:37:42 -07:00
extable.c
fork.c	kernel: add kcov code coverage	2016-03-22 15:36:02 -07:00
freezer.c
futex.c	futex: Replace barrier() in unqueue_me() with READ_ONCE()	2016-03-08 17:04:02 +01:00
futex_compat.c	ptrace: use fsuid, fsgid, effective creds for fs access checks	2016-01-20 17:09:18 -08:00
groups.c
hung_task.c	kernel/hung_task.c: use timeout diff when timeout is updated	2016-03-22 15:36:02 -07:00
irq_work.c	treewide: Remove old email address	2015-11-23 09:44:58 +01:00
jump_label.c	treewide: Remove old email address	2015-11-23 09:44:58 +01:00
kallsyms.c	kallsyms: add support for relative offsets in kallsyms address table	2016-03-15 16:55:16 -07:00
kcmp.c	ptrace: use fsuid, fsgid, effective creds for fs access checks	2016-01-20 17:09:18 -08:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kernel: add kcov code coverage	2016-03-22 15:36:02 -07:00
kexec.c	kexec: set KEXEC_TYPE_CRASH before sanity_check_segment_list()	2016-01-20 17:09:18 -08:00
kexec_core.c	kexec: Set IORESOURCE_SYSTEM_RAM for System RAM	2016-01-30 09:49:57 +01:00
kexec_file.c	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2016-03-17 11:33:45 -07:00
kexec_internal.h	kexec: move some memembers and definitions within the scope of CONFIG_KEXEC_FILE	2016-01-20 17:09:18 -08:00
kmod.c
kprobes.c
ksysfs.c	rcu: Remove TINY_RCU bloat from pointless boot parameters	2015-12-07 16:59:37 -08:00
kthread.c
latencytop.c	sched/debug: Make schedstats a runtime tunable that is disabled by default	2016-02-09 11:54:23 +01:00
Makefile	kernel: add kcov code coverage	2016-03-22 15:36:02 -07:00
membarrier.c
memremap.c	memremap: add MEMREMAP_WC flag	2016-03-22 15:36:02 -07:00
module-internal.h
module.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching	2016-03-17 21:46:32 -07:00
module_signing.c	X.509: Make algo identifiers text instead of enum	2016-03-03 21:49:27 +00:00
notifier.c
nsproxy.c	cgroup: introduce cgroup namespaces	2016-02-16 13:04:58 -05:00
padata.c
panic.c	panic: change nmi_panic from macro to function	2016-03-22 15:36:02 -07:00
params.c	Nothing exciting, minor tweaks and cleanups.	2015-11-09 15:53:39 -08:00
pid.c	Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-01-31 15:44:04 -08:00
pid_namespace.c
profile.c	profile: hide unused functions when !CONFIG_PROC_FS	2016-03-22 15:36:02 -07:00
ptrace.c	ptrace: change __ptrace_unlink() to clear ->ptrace under ->siglock	2016-03-22 15:36:02 -07:00
range.c
reboot.c
relay.c	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
resource.c	/proc/iomem: only expose physical resource addresses to privileged users	2016-04-14 12:56:09 -07:00
seccomp.c	seccomp: check in_compat_syscall, not is_compat_task, in strict mode	2016-03-22 15:36:02 -07:00
signal.c	kernel/signal.c: add compile-time check for __ARCH_SI_PREAMBLE_SIZE	2016-03-22 15:36:02 -07:00
smp.c	Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-03-15 13:50:29 -07:00
smpboot.c	cpu/hotplug: Unpark smpboot threads from the state machine	2016-03-01 20:36:56 +01:00
smpboot.h	cpu/hotplug: Create hotplug threads	2016-03-01 20:36:56 +01:00
softirq.c	arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections	2016-03-25 16:37:42 -07:00
stacktrace.c
stop_machine.c	kernel/stop_machine.c: remove CONFIG_SMP dependencies	2016-01-16 11:17:24 -08:00
sys.c	timer: convert timer_slack_ns from unsigned long to u64	2016-03-17 15:09:34 -07:00
sys_ni.c	vfs: add copy_file_range syscall and vfs helper	2015-12-01 14:00:53 -05:00
sysctl.c	mm: scale kswapd watermarks in proportion to memory	2016-03-17 15:09:34 -07:00
sysctl_binary.c	fs/coredump: prevent fsuid=0 dumps into user-controlled directories	2016-03-22 15:36:02 -07:00
task_work.c
taskstats.c
test_kprobes.c
torture.c
tracepoint.c	kernel/...: convert pr_warning to pr_warn	2016-03-22 15:36:02 -07:00
tsacct.c	time, acct: Drop irq save & restore from __acct_update_integrals()	2016-02-29 09:53:09 +01:00
uid16.c
up.c
user-return-notifier.c
user.c
user_namespace.c	kernel/*: switch to memdup_user_nul()	2016-01-04 10:27:55 -05:00
utsname.c
utsname_sysctl.c
watchdog.c	watchdog: don't run proc_watchdog_update if new value is same as old	2016-03-17 15:09:34 -07:00
workqueue.c	Merge branch 'for-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2016-03-18 20:05:39 -07:00
workqueue_internal.h	sched/core: Get rid of 'cpu' argument in wq_worker_sleeping()	2016-03-02 10:28:47 -05:00