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| author |   Ashok Raj <ashok.raj@intel.com> | 2006-04-27 18:39:30 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-04-28 08:33:47 -0700 |
| commit | 35076bdfa171cd83d89fcb96568e786f0da91d9f (patch) | |
| tree | 52057bed0ad54c5b6d10e0da56c56f1233d71a44 /arch/sh64 | |
| parent | [PATCH] Avoid printing pointless tsc skew msgs (diff) | |
| download | linux-dev-35076bdfa171cd83d89fcb96568e786f0da91d9f.tar.xz linux-dev-35076bdfa171cd83d89fcb96568e786f0da91d9f.zip | |
[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 <ashok.raj@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/sh64')
0 files changed, 0 insertions, 0 deletions