by The following patches introduce smp_call_function_on_cpu which
provides a facility for sending IPIs to a group or single cpu encapsulated
within a bitmask, this function could be used trigger remote cpus to
modify percpu data in order to maintain local modification mandates for
lockless algorithms, although perhaps not in a real hotpath due to
contention for the call_lock and dependency on IPI performance on a
specific architecture.
At present there are a number of arch specific functions which achieve
the same effect, the name was lifted from Alpha. As per Manfred's request
i have also taken the liberty of removing the nonatomic/retry parameter
from smp_call_function since it's used as 'nonatomic' on a number of
architectures and used as 'retry' on others whilst not actually doing much
on a majority of said architectures.
The patches have been acked by some arch maintainers with no contest
otherwise when i originally posted. If a particular arch maintainer notes
breakage in my implementation please point it out and i'll do the grunt
work.
Thanks,
Zwane
arch/alpha/kernel/core_marvel.c | 1
arch/alpha/kernel/smp.c | 67 ++++++----------------
arch/i386/kernel/cpu/mcheck/non-fatal.c | 2
arch/i386/kernel/cpu/mtrr/main.c | 2
arch/i386/kernel/cpuid.c | 2
arch/i386/kernel/io_apic.c | 4 -
arch/i386/kernel/ldt.c | 2
arch/i386/kernel/microcode.c | 2
arch/i386/kernel/msr.c | 4 -
arch/i386/kernel/reboot.c | 2
arch/i386/kernel/smp.c | 64 +++++++++++++++++++--
arch/i386/kernel/sysenter.c | 2
arch/i386/mach-voyager/voyager_smp.c | 8 +-
arch/i386/mm/pageattr.c | 2
arch/i386/oprofile/nmi_int.c | 8 +-
arch/ia64/kernel/palinfo.c | 2
arch/ia64/kernel/perfmon.c | 2
arch/ia64/kernel/smp.c | 57 ++++++++++++-------
arch/ia64/kernel/smpboot.c | 2
arch/mips/kernel/smp.c | 54 ++++++++++++++++--
arch/mips64/kernel/smp.c | 74 +++++++++++++++++++++---
arch/parisc/kernel/cache.c | 2
arch/parisc/kernel/irq.c | 6 +-
arch/parisc/kernel/smp.c | 91 ++++++++++++++++++++++++++----
arch/parisc/mm/init.c | 2
arch/ppc/kernel/smp.c | 86 +++++++++++++++++++++++++++-
arch/ppc64/kernel/smp.c | 95 ++++++++++++++++++++++++++++++--
arch/s390/kernel/smp.c | 75 ++++++++++++++++++++++---
arch/s390x/kernel/smp.c | 69 ++++++++++++++++++++---
arch/sparc64/kernel/smp.c | 64 ++++++++++++++++++++-
arch/um/kernel/smp.c | 39 ++++++++++++-
arch/x86_64/kernel/bluesmoke.c | 2
arch/x86_64/kernel/cpuid.c | 2
arch/x86_64/kernel/io_apic.c | 2
arch/x86_64/kernel/ldt.c | 2
arch/x86_64/kernel/msr.c | 4 -
arch/x86_64/kernel/reboot.c | 2
arch/x86_64/kernel/smp.c | 65 ++++++++++++++++++++-
arch/x86_64/mm/pageattr.c | 2
drivers/char/agp/agp.h | 2
drivers/s390/char/sclp.c | 2
drivers/s390/net/iucv.c | 4 -
fs/buffer.c | 2
include/asm-alpha/smp.h | 7 --
include/asm-ia64/smp.h | 2
include/asm-parisc/cacheflush.h | 7 --
include/linux/smp.h | 12 +++-
mm/slab.c | 2
48 files changed, 818 insertions(+), 195 deletions(-)
-
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