01 Aug, 2006
1 commit
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Use hotplug version of register_cpu_notifier in late init functions.
Signed-off-by: Chandra Seetharaman
Cc: "Luck, Tony"
Cc: Martin Schwidefsky
Cc: Andi Kleen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
28 Jun, 2006
2 commits
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Make notifier_blocks associated with cpu_notifier as __cpuinitdata.
__cpuinitdata makes sure that the data is init time only unless
CONFIG_HOTPLUG_CPU is defined.Signed-off-by: Chandra Seetharaman
Cc: Ashok Raj
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
In 2.6.17, there was a problem with cpu_notifiers and XFS. I provided a
band-aid solution to solve that problem. In the process, i undid all the
changes you both were making to ensure that these notifiers were available
only at init time (unless CONFIG_HOTPLUG_CPU is defined).We deferred the real fix to 2.6.18. Here is a set of patches that fixes the
XFS problem cleanly and makes the cpu notifiers available only at init time
(unless CONFIG_HOTPLUG_CPU is defined).If CONFIG_HOTPLUG_CPU is defined then cpu notifiers are available at run
time.This patch reverts the notifier_call changes made in 2.6.17
Signed-off-by: Chandra Seetharaman
Cc: Ashok Raj
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Apr, 2006
1 commit
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Few of the notifier_chain_register() callers use __init in the definition
of notifier_call. It is incorrect as the function definition should be
available after the initializations (they do not unregister them during
initializations).This patch fixes all such usages to _not_ have the notifier_call __init
section.Signed-off-by: Chandra Seetharaman
Signed-off-by: Linus Torvalds
04 Feb, 2006
1 commit
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The patch implements cpu topology exportation by sysfs.
Items (attributes) are similar to /proc/cpuinfo.
1) /sys/devices/system/cpu/cpuX/topology/physical_package_id:
represent the physical package id of cpu X;
2) /sys/devices/system/cpu/cpuX/topology/core_id:
represent the cpu core id to cpu X;
3) /sys/devices/system/cpu/cpuX/topology/thread_siblings:
represent the thread siblings to cpu X in the same core;
4) /sys/devices/system/cpu/cpuX/topology/core_siblings:
represent the thread siblings to cpu X in the same physical package;To implement it in an architecture-neutral way, a new source file,
driver/base/topology.c, is to export the 5 attributes.If one architecture wants to support this feature, it just needs to
implement 4 defines, typically in file include/asm-XXX/topology.h.
The 4 defines are:
#define topology_physical_package_id(cpu)
#define topology_core_id(cpu)
#define topology_thread_siblings(cpu)
#define topology_core_siblings(cpu)The type of **_id is int.
The type of siblings is cpumask_t.To be consistent on all architectures, the 4 attributes should have
deafult values if their values are unavailable. Below is the rule.1) physical_package_id: If cpu has no physical package id, -1 is the
default value.2) core_id: If cpu doesn't support multi-core, its core id is 0.
3) thread_siblings: Just include itself, if the cpu doesn't support
HT/multi-thread.4) core_siblings: Just include itself, if the cpu doesn't support
multi-core and HT/Multi-thread.So be careful when declaring the 4 defines in include/asm-XXX/topology.h.
If an attribute isn't defined on an architecture, it won't be exported.
Thank Nathan, Greg, Andi, Paul and Venki.
The patch provides defines for i386/x86_64/ia64.
Signed-off-by: Zhang, Yanmin
Cc: Ingo Molnar
Cc: Nick Piggin
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
