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linux/arch/ia64/kernel
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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>
 		2005-11-09 07:56:33 -08:00
..
cpufreq [IA64] Add ACPI based P-state support 2005-08-26 15:09:24 -07:00
Makefile [PATCH] cpusets: Move the ia64 domain setup code to the generic code 2005-09-07 16:57:40 -07:00
acpi-ext.c [ACPI] Lindent all ACPI files 2005-08-05 00:45:14 -04:00
acpi.c [IA64] move ACPI IOSAPIC locality domain mapping from pci.c to acpi.c 2005-09-19 15:57:48 -07:00
asm-offsets.c [IA64] fix circular dependency on generation of asm-offsets.h 2005-09-13 08:50:39 -07:00
brl_emu.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cyclone.c [PATCH] fix missing includes 2005-10-30 17:37:32 -08:00
efi.c [IA64] include EFI memory information in /proc/iomem 2005-09-19 15:42:36 -07:00
efi_stub.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
entry.S [IA64] Remove warnings for gcc 4.0 IA64 compilation. 2005-09-16 09:45:27 -07:00
entry.h [IA64] Drop spurious paren in entry.h 2005-06-20 09:34:02 -07:00
fsys.S kbuild: ia64 use generic asm-offsets.h support 2005-09-09 22:03:13 +02:00
gate-data.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
gate.S kbuild: ia64 use generic asm-offsets.h support 2005-09-09 22:03:13 +02:00
gate.lds.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
head.S kbuild: ia64 use generic asm-offsets.h support 2005-09-09 22:03:13 +02:00
ia64_ksyms.c [IA64] __ia64_syscall() is no longer used anywhere in the kernel. Remove it. 2005-04-27 21:10:45 -07:00
init_task.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
iosapic.c [IA64] Manual merge fix for 3 files 2005-09-08 14:27:13 -07:00
irq.c [IA64] wider use of for_each_cpu_mask() in arch/ia64 2005-10-25 15:10:08 -07:00
irq_ia64.c [IA64] assign_irq_vector() should not panic 2005-07-11 10:30:07 -07:00
irq_lsapic.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ivt.S [IA64] MCA/INIT: remove the physical mode path from minstate.h 2005-09-11 14:09:12 -07:00
jprobes.S [PATCH] Kprobes: prevent possible race conditions ia64 changes 2005-09-07 16:58:00 -07:00
kprobes.c [PATCH] Kprobes: preempt_disable/enable() simplification 2005-11-07 07:53:46 -08:00
machvec.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mca.c [IA64] another place to use for_each_cpu_mask() in arch/ia64 2005-10-25 15:12:05 -07:00
mca_asm.S [IA64] Wire in the MCA/INIT handler stacks 2005-09-22 13:24:19 -07:00
mca_drv.c [IA64] MCA recovery verify pfn_valid 2005-09-22 13:27:59 -07:00
mca_drv.h [IA64] mca_drv cleanup 2005-09-16 10:39:40 -07:00
mca_drv_asm.S [IA64] mca_drv cleanup 2005-09-16 10:39:40 -07:00
minstate.h [IA64] MCA/INIT: remove the physical mode path from minstate.h 2005-09-11 14:09:12 -07:00
module.c [IA64] wider use of for_each_cpu_mask() in arch/ia64 2005-10-25 15:10:08 -07:00
numa.c [IA64] fix generic/up builds 2005-07-06 18:18:10 -07:00
pal.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
palinfo.c [IA64] Allow /proc/pal/cpu0/vm_info under the simulator 2005-08-31 08:34:51 -07:00
patch.c [IA64] Fix 2.6 kernel for the new ia64 assembler 2005-10-25 15:05:45 -07:00
perfmon.c [PATCH] kfree cleanup: arch 2005-11-07 07:54:06 -08:00
perfmon_default_smpl.c [IA64] perfmon: make pfm_sysctl a global, and other cleanup 2005-04-25 13:08:30 -07:00
perfmon_generic.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
perfmon_itanium.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
perfmon_mckinley.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
process.c [PATCH] sched: disable preempt in idle tasks 2005-11-09 07:56:33 -08:00
ptrace.c [IA64] fix warning unused variable `g' 2005-10-28 15:52:13 -07:00
sal.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
salinfo.c [IA64] MCA/INIT: avoid reading INIT record during INIT event 2005-09-11 14:02:43 -07:00
semaphore.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
setup.c [PATCH] ia64: re-implement dma_get_cache_alignment to avoid EXPORT_SYMBOL 2005-11-07 07:53:23 -08:00
sigframe.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
signal.c [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
smp.c [IA64] wider use of for_each_cpu_mask() in arch/ia64 2005-10-25 15:10:08 -07:00
smpboot.c [PATCH] sched: disable preempt in idle tasks 2005-11-09 07:56:33 -08:00
sys_ia64.c [IA64] Rationalise Region Definitions 2005-08-24 15:35:41 -07:00
time.c [PATCH] jiffies_64 cleanup 2005-10-30 17:37:25 -08:00
topology.c [ACPI] delete CONFIG_ACPI_BOOT 2005-08-24 12:08:54 -04:00
traps.c [PATCH] Kprobes: prevent possible race conditions ia64 changes 2005-09-07 16:58:00 -07:00
unaligned.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
uncached.c [IA64] simplified efi memory map parsing 2005-09-08 12:39:59 -07:00
unwind.c [IA64] MCA/INIT: remove obsolete unwind code 2005-09-11 14:09:34 -07:00
unwind_decoder.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
unwind_i.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
vmlinux.lds.S [PATCH] Kprobes: prevent possible race conditions ia64 changes 2005-09-07 16:58:00 -07:00