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Nick Piggin 5bfb5d690f [PATCH] sched: disable preempt in idle tasks ... Run idle threads with preempt disabled. Also corrected a bugs in arm26's cpu_idle (make it actually call schedule()). How did it ever work before? Might fix the CPU hotplugging hang which Nigel Cunningham noted. We think the bug hits if the idle thread is preempted after checking need_resched() and before going to sleep, then the CPU offlined. After calling stop_machine_run, the CPU eventually returns from preemption and into the idle thread and goes to sleep. The CPU will continue executing previous idle and have no chance to call play_dead. By disabling preemption until we are ready to explicitly schedule, this bug is fixed and the idle threads generally become more robust. From: alexs <ashepard@u.washington.edu> PPC build fix From: Yoichi Yuasa <yuasa@hh.iij4u.or.jp> MIPS build fix Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		20 years ago
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alpha	[PATCH] jiffies_64 cleanup	20 years ago
arm	[PATCH] sched: disable preempt in idle tasks	20 years ago
arm26	[PATCH] sched: disable preempt in idle tasks	20 years ago
cris	[PATCH] sched: disable preempt in idle tasks	20 years ago
frv	[PATCH] sched: disable preempt in idle tasks	20 years ago
h8300	[PATCH] sched: disable preempt in idle tasks	20 years ago
i386	[PATCH] sched: disable preempt in idle tasks	20 years ago
ia64	[PATCH] sched: disable preempt in idle tasks	20 years ago
m32r	[PATCH] sched: disable preempt in idle tasks	20 years ago
m68k	[PATCH] sched: disable preempt in idle tasks	20 years ago
m68knommu	[PATCH] m68knommu: move some platform irq support out of irq.h	20 years ago
mips	[PATCH] sched: disable preempt in idle tasks	20 years ago
parisc	[PATCH] sched: disable preempt in idle tasks	20 years ago
powerpc	[PATCH] sched: disable preempt in idle tasks	20 years ago
ppc	[PATCH] sched: disable preempt in idle tasks	20 years ago
ppc64	[PATCH] sched: disable preempt in idle tasks	20 years ago
s390	[PATCH] sched: disable preempt in idle tasks	20 years ago
sh	[PATCH] sched: disable preempt in idle tasks	20 years ago
sh64	[PATCH] sched: disable preempt in idle tasks	20 years ago
sparc	[PATCH] sched: disable preempt in idle tasks	20 years ago
sparc64	[PATCH] sched: disable preempt in idle tasks	20 years ago
um	[PATCH] kfree cleanup: arch	20 years ago
v850	[PATCH] sched: disable preempt in idle tasks	20 years ago
x86_64	[PATCH] sched: disable preempt in idle tasks	20 years ago
xtensa	[PATCH] sched: disable preempt in idle tasks	20 years ago