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5bfb5d690f
linux/arch/sparc64/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
..
asm-offsets.c kbuild: frv,m32r,sparc64 introduce fake asm-offsets.h file 2005-09-09 22:47:53 +02:00
auxio.c [SPARC64]: Get rid of fast IRQ feature. 2005-06-27 17:04:45 -07:00
binfmt_aout32.c [PATCH] mm: mm_init set_mm_counters 2005-10-29 21:40:38 -07:00
binfmt_elf32.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
central.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
chmc.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cpu.c [SPARC64]: Add missing IDs for newer cpus. 2005-09-27 22:50:06 -07:00
devices.c [SPARC64]: Probe D/I/E-cache config and use. 2005-09-26 00:32:17 -07:00
dtlb_backend.S [SPARC64]: Kill SZ_BITS define from dtlb_backend.S 2005-09-21 19:23:48 -07:00
dtlb_base.S [SPARC64]: Fix boot failures on SunBlade-150 2005-10-12 12:22:46 -07:00
dtlb_prot.S [SPARC64]: Fix boot failures on SunBlade-150 2005-10-12 12:22:46 -07:00
ebus.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
entry.S [SPARC64]: Fix userland FPU state corruption. 2005-10-07 13:30:49 -07:00
etrap.S [SPARC64]: Replace cheetah+ code patching with variables. 2005-10-04 15:23:20 -07:00
head.S [SPARC64]: Fix boot failures on SunBlade-150 2005-10-12 12:22:46 -07:00
idprom.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
init_task.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ioctl32.c [PATCH] remove ioctl32_handler_t 2005-11-09 07:56:00 -08:00
iommu_common.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
iommu_common.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
irq.c [SPARC64]: Fix compile error in irq.c 2005-10-08 21:12:04 -07:00
isa.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
itlb_base.S [SPARC64]: Fix boot failures on SunBlade-150 2005-10-12 12:22:46 -07:00
kprobes.c [PATCH] Kprobes: preempt_disable/enable() simplification 2005-11-07 07:53:46 -08:00
ktlb.S [SPARC64]: Fix boot failures on SunBlade-150 2005-10-12 12:22:46 -07:00
Makefile [SPARC64]: Move kernel unaligned trap handlers into assembler file. 2005-08-19 15:55:33 -07:00
module.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci_common.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci_impl.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci_iommu.c [SPARC64]: Eliminate PCI IOMMU dma mapping size limit. 2005-10-13 22:15:24 -07:00
pci_psycho.c [SPARC64]: Consolidate common PCI IOMMU init code. 2005-10-13 21:10:08 -07:00
pci_sabre.c [SPARC64]: Consolidate common PCI IOMMU init code. 2005-10-13 21:10:08 -07:00
pci_schizo.c [SPARC64]: Consolidate common PCI IOMMU init code. 2005-10-13 21:10:08 -07:00
pci.c [PATCH] Make sparc64 use setup-res.c 2005-09-08 14:57:25 -07:00
power.c [SPARC64]: Probe for power device on ISA bus too. 2005-10-06 20:43:54 -07:00
process.c [PATCH] sched: disable preempt in idle tasks 2005-11-09 07:56:33 -08:00
ptrace.c [SPARC64]: Fix several bugs in flush_ptrace_access(). 2005-09-29 18:50:34 -07:00
rtrap.S [SPARC64]: Fix userland FPU state corruption. 2005-10-07 13:30:49 -07:00
sbus.c [SPARC64]: More fully work around Spitfire Errata 51. 2005-08-29 12:46:22 -07:00
semaphore.c [SPARC64]: Avoid membar instructions in delay slots. 2005-06-27 15:42:04 -07:00
setup.c [SPARC64] mm: don't re-evaluate *ptep 2005-11-07 14:08:46 -08:00
signal32.c [SPARC64] mm: don't re-evaluate *ptep 2005-11-07 14:08:46 -08:00
signal.c [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
smp.c [PATCH] sched: disable preempt in idle tasks 2005-11-09 07:56:33 -08:00
sparc64_ksyms.c [LIB]: Consolidate _atomic_dec_and_lock() 2005-09-14 21:47:01 -07:00
starfire.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sunos_ioctl32.c [SPARC]: Kill remaining kbio.h references. 2005-11-07 14:12:21 -08:00
sys32.S [SPARC64]: Fix fault handling in unaligned trap handler. 2005-09-28 20:41:45 -07:00
sys_sparc32.c [PATCH] remove duplicated sys_open32() code from 64bit archs 2005-09-07 16:57:43 -07:00
sys_sparc.c [PATCH] Avoiding mmap fragmentation 2005-06-21 18:46:16 -07:00
sys_sunos32.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
systbls.S [SPARC]: Add inotify syscall entries. 2005-07-27 14:14:39 -07:00
time.c [SPARC64]: Kill off dummy_tick_ops. 2005-11-07 14:10:10 -08:00
trampoline.S [SPARC64]: Replace cheetah+ code patching with variables. 2005-10-04 15:23:20 -07:00
traps.c [SPARC64]: Rewrite convoluted physical memory probing. 2005-09-29 17:58:26 -07:00
ttable.S [SPARC64]: Revamp Spitfire error trap handling. 2005-08-29 12:45:11 -07:00
una_asm.S [SPARC64]: Fix fault handling in unaligned trap handler. 2005-09-28 20:41:45 -07:00
unaligned.c [SPARC64]: Fix fault handling in unaligned trap handler. 2005-09-28 20:41:45 -07:00
us2e_cpufreq.c [PATCH] kfree cleanup: arch 2005-11-07 07:54:06 -08:00
us3_cpufreq.c [PATCH] kfree cleanup: arch 2005-11-07 07:54:06 -08:00
vmlinux.lds.S [SPARC64]: Add CONFIG_DEBUG_PAGEALLOC support. 2005-09-25 16:46:57 -07:00
winfixup.S [SPARC64]: Replace cheetah+ code patching with variables. 2005-10-04 15:23:20 -07:00