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Sebastien Dugue 94df7de028 hrtimers: allow the hot-unplugging of all cpus ... Impact: fix CPU hotplug hang on Power6 testbox On architectures that support offlining all cpus (at least powerpc/pseries), hot-unpluging the tick_do_timer_cpu can result in a system hang. This comes from the fact that if the cpu going down happens to be the cpu doing the tick, then as the tick_do_timer_cpu handover happens after the cpu is dead (via the CPU_DEAD notification), we're left without ticks, jiffies are frozen and any task relying on timers (msleep, ...) is stuck. That's particularly the case for the cpu looping in __cpu_die() waiting for the dying cpu to be dead. This patch addresses this by having the tick_do_timer_cpu handover happen earlier during the CPU_DYING notification. For this, a new clockevent notification type is introduced (CLOCK_EVT_NOTIFY_CPU_DYING) which is triggered in hrtimer_cpu_notify(). Signed-off-by: Sebastien Dugue <sebastien.dugue@bull.net> Cc: <stable@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>		16 years ago
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Kconfig	Kconfig: eliminate "def_bool n" constructs	17 years ago
Makefile	clockevents: Allow build w/o run-tine usage for migration purposes	18 years ago
clockevents.c	cpumask: convert struct clock_event_device to cpumask pointers.	16 years ago
clocksource.c	cpumask: replace for_each_cpu_mask_nr with for_each_cpu in kernel/time/	16 years ago
jiffies.c	trivial: fix then -> than typos in comments and documentation	16 years ago
ntp.c	hrtimer: removing all ur callback modes	16 years ago
tick-broadcast.c	cpumask: replace for_each_cpu_mask_nr with for_each_cpu in kernel/time/	16 years ago
tick-common.c	hrtimers: allow the hot-unplugging of all cpus	16 years ago
tick-internal.h	NOHZ: restart tick device from irq_enter()	17 years ago
tick-oneshot.c	clockevents: remove WARN_ON which was used to gather information	17 years ago
tick-sched.c	time-sched.c: tick_nohz_update_jiffies should be static	16 years ago
timekeeping.c	sched_clock: prevent scd->clock from moving backwards, take #2	16 years ago
timer_list.c	Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2	17 years ago
timer_stats.c	kernel: use non-racy method for proc entries creation	17 years ago