|author||Ashok Raj <email@example.com>||2006-04-27 18:39:30 -0700|
|committer||Linus Torvalds <firstname.lastname@example.org>||2006-04-28 08:33:47 -0700|
|parent||[PATCH] Avoid printing pointless tsc skew msgs (diff)|
[PATCH] enable X86_PC for HOTPLUG_CPU
CPU_HOTPLUG has race conditions when we use broadcast mode IPI. - First we introduced no_broadcast option (see include/asm-i386/mach-default/mach_ipi.h) - x86_64 solved it by using physical flat mode (same as bigsmp on i386) since this will not use broadcast shortcuts for IPI. - We switched to use bigsmp on i386 so that we can have same handling as x86_64, but apparently this caused an error message, if kernel was compiled without X86_GENERICARCH, X86_BIGSMP. The message "You have >8 CPUS..." which was bogus and misleading, and only indicated one of the above ARCH wasnt selected. So we do not switch to automatic bigsmp for HOTPLUG_CPU support in i386 until the other related config dependencies for SMP_SUSPEND etc can be done right. Signed-off-by: Ashok Raj <email@example.com> Signed-off-by: Andrew Morton <firstname.lastname@example.org> Signed-off-by: Linus Torvalds <email@example.com>
Diffstat (limited to 'arch')
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig
index 18ec9fe6deb6..366b401c1f29 100644
@@ -756,7 +756,7 @@ config PHYSICAL_START
bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
- depends on SMP && HOTPLUG && EXPERIMENTAL && !X86_VOYAGER && !X86_PC
+ depends on SMP && HOTPLUG && EXPERIMENTAL && !X86_VOYAGER
Say Y here to experiment with turning CPUs off and on. CPUs
can be controlled through /sys/devices/system/cpu.