kernel-aes67/arch/i386
Ashok Raj d3f4aaa3d7 [PATCH] x86: make CONFIG_HOTPLUG_CPU depend on !X86_PC
Make CONFIG_HOTPLUG_CPU depend on !X86_PC, so we need to turn on either
CONFIG_GENERICARCH, CONFIG_BIGSMP or any other subarch except X86_PC when
CONFIG_HOTPLUG_CPU=y

With 2.6.15+ kernels when CONFIG_HOTPLUG_CPU is turned on we switch to
bigsmp mode for sending IPI's and ioapic configurations that caused the
following error message.

>> More than 8 CPUs detected and CONFIG_X86_PC cannot handle it.
>> Use CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.

Originally bigsmp was added just to handle >8 cpus, but now with hotplug
cpu support we need to use bigsmp mode (why?  see below), that cause the
above error message even if there were less than 8 cpus in the system.

The message is bogus, but we are cannot use logical flat mode due to issues
with broadcast IPI can confuse a CPU just comming up.  We use flat physical
mode just like x86_64 case.  More details on why bigsmp now uses flat
physical mode (vs.  cluster mode) in following link.

http://marc.theaimsgroup.com/?l=linux-kernel&m=113261865814107&w=2

Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25 08:22:50 -08:00
..
boot [PATCH] x86: gitignore some autogenerated files for i386 2006-02-14 16:09:35 -08:00
crypto [CRYPTO] aes-i586: Remove unused variable ls_tab 2006-01-09 14:15:53 -08:00
kernel [PATCH] fix DMI onboard device discovery 2006-03-25 08:22:48 -08:00
lib [LIB]: Consolidate _atomic_dec_and_lock() 2005-09-14 21:47:01 -07:00
mach-default [PATCH] Fix topology.c location 2006-02-24 14:31:39 -08:00
mach-es7000 [PATCH] Compilation fix for ES7000 when no ACPI is specified in config (i386) 2006-03-23 07:38:04 -08:00
mach-generic [PATCH] x86: sutomatically enable bigsmp when we have more than 8 CPUs 2005-09-05 00:06:10 -07:00
mach-visws [PATCH] kill include/linux/platform.h, default_idle() cleanup 2006-03-24 07:33:21 -08:00
mach-voyager [PATCH] fix voyager after topology.c move 2006-02-26 19:10:30 -08:00
math-emu [PATCH] i386: inline assembler: cleanup and encapsulate descriptor and task register management 2005-09-05 00:06:11 -07:00
mm [PATCH] pause_on_oops command line option 2006-03-23 07:38:16 -08:00
oprofile [PATCH] more for_each_cpu() conversions 2006-03-23 07:38:17 -08:00
pci [PATCH] PCI: PCI/Cardbus cards hidden, needs pci=assign-busses to fix 2006-03-23 14:35:14 -08:00
power [PATCH] x86: add MCE resume 2005-11-07 07:53:30 -08:00
defconfig update the i386 defconfig 2006-03-20 20:14:06 +01:00
Kconfig [PATCH] x86: make CONFIG_HOTPLUG_CPU depend on !X86_PC 2006-03-25 08:22:50 -08:00
Kconfig.cpu [PATCH] Base support for AMD Geode GX/LX processors 2006-01-06 08:33:38 -08:00
Kconfig.debug [PATCH] i386: multi-column stack backtraces 2006-03-23 07:38:03 -08:00
Makefile [PATCH] i386: remove gcc version check for CONFIG_REGPARM 2006-01-16 23:15:25 -08:00
Makefile.cpu [PATCH] remove gcc-2 checks 2006-01-08 20:14:02 -08:00