Ingo Molnar dc1829a4c3 [PATCH] i386/x86_64: ACPI cpu_idle_wait() fix ... The scheduler on Andreas Friedrich's hyperthreading system stopped working properly: the scheduler would never move tasks to another CPU! The lask known working kernel was 2.6.8. After a couple of attempts to corner the bug, the following smoking gun was found: BIOS reported wrong ACPI idfor the processor CPU#1: set_cpus_allowed(), swapper:1, 3 -> 2 [<c0103bbe>] show_trace_log_lvl+0x34/0x4a [<c0103ceb>] show_trace+0x2c/0x2e [<c01045f8>] dump_stack+0x2b/0x2d [<c0116a77>] set_cpus_allowed+0x52/0xec [<c0101d86>] cpu_idle_wait+0x2e/0x100 [<c0259c57>] acpi_processor_power_exit+0x45/0x58 [<c0259752>] acpi_processor_remove+0x46/0xea [<c025c6fb>] acpi_start_single_object+0x47/0x54 [<c025cee5>] acpi_bus_register_driver+0xa4/0xd3 [<c04ab2d7>] acpi_processor_init+0x57/0x77 [<c01004d7>] init+0x146/0x2fd [<c0103a87>] kernel_thread_helper+0x7/0x10 a quick look at cpu_idle_wait() shows how broken that code is on i386: it changes the init task's affinity map but never restores it ... and because all userspace tasks get forked by init, they all inherited that single-CPU affinity mask. x86_64 cloned this bug too. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Andreas Friedrich <andreas.friedrich@fujitsu-siemens.com> Cc: Wolfgang Erig <Wolfgang.Erig@fujitsu-siemens.com> Cc: Andrew Morton <akpm@osdl.org> Cc: Adrian Bunk <bunk@stusta.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-11-17 08:20:09 -08:00
..
boot	[PATCH] Some config.h removals	2006-10-01 00:39:34 -07:00
crypto
kernel	[PATCH] i386/x86_64: ACPI cpu_idle_wait() fix	2006-11-17 08:20:09 -08:00
lib	[PATCH] separate bdi congestion functions from queue congestion functions	2006-10-20 10:26:35 -07:00
mach-default
mach-es7000
mach-generic	[PATCH] i386: Replace i386 open-coded cmdline parsing with	2006-09-26 10:52:32 +02:00
mach-visws	[PATCH] visws build fix	2006-10-28 11:30:52 -07:00
mach-voyager	[VOYAGER] fix up ptregs removal mess	2006-10-12 22:25:03 -05:00
math-emu
mm	[PATCH] mm: use symbolic names instead of indices for zone initialisation	2006-10-11 11:14:14 -07:00
oprofile	[PATCH] oprofile: ppro: need to enable/disable all the counters	2006-09-29 09:18:11 -07:00
pci	[PATCH] fix via586 irq routing for pirq 5	2006-11-14 09:09:27 -08:00
power	[PATCH] Change the name of pagedir_nosave	2006-09-26 08:49:01 -07:00
defconfig	[PATCH] i386: Update defconfig	2006-10-21 18:37:01 +02:00
Kconfig	Attack of "the the"s in arch	2006-10-03 22:21:02 +02:00
Kconfig.cpu	[PATCH] uml: fix processor selection to exclude unsupported processors and features	2006-10-11 11:14:20 -07:00
Kconfig.debug
Makefile	[PATCH] x86: Use -maccumulate-outgoing-args	2006-10-21 18:37:01 +02:00
Makefile.cpu