linux/drivers/base/cpu.c, branch v2.6.25

register_cpu devinit or cpuinit

2008-02-06T18:41:01Z

Is there some reason why register_cpu() is __devinit instead of __cpuinit ? Make it __cpuinit. Signed-off-by: Randy Dunlap Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Driver core: change sysdev classes to use dynamic kobject names

2008-01-25T04:40:40Z

All kobjects require a dynamically allocated name now. We no longer need to keep track if the name is statically assigned, we can just unconditionally free() all kobject names on cleanup. Signed-off-by: Kay Sievers Signed-off-by: Greg Kroah-Hartman

CPU online file permission

2007-07-31T22:39:39Z

Is there a reason why the "online" file in the subdirectories for the CPUs in /sys/devices/system isn't world-readable? I cannot imagine it to be security relevant especially now that a getcpu() syscall can be used to determine what CPUa thread runs on. The file is useful to correctly implement the sysconf() function to return the number of online CPUs. In the presence of hotplug we currently cannot provide this information. The patch below should to it. Signed-off-by: Ulrich Drepper Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Replace remaining references to "driverfs" with "sysfs".

2007-02-17T18:13:42Z

Globally, s/driverfs/sysfs/g. Signed-off-by: Robert P. J. Day Signed-off-by: Adrian Bunk

[PATCH] i386: change the 'no_control' field to 'hotpluggable' in the struct cpu

2006-12-07T01:14:10Z

Change the 'no_control' field in the cpu struct to a more positive and better term 'hotpluggable'. And change(/cleanup) the logic accordingly. Signed-off-by: Suresh Siddha Signed-off-by: Andi Kleen Cc: Andi Kleen Cc: "Li, Shaohua" Signed-off-by: Andrew Morton

[PATCH] severing module.h->sched.h

2006-12-04T07:00:22Z

Signed-off-by: Al Viro

[PATCH] sched: mc/smt power savings sched policy

2006-06-28T00:32:45Z

sysfs entries 'sched_mc_power_savings' and 'sched_smt_power_savings' in /sys/devices/system/cpu/ control the MC/SMT power savings policy for the scheduler. Based on the values (1-enable, 0-disable) for these controls, sched groups cpu power will be determined for different domains. When power savings policy is enabled and under light load conditions, scheduler will minimize the physical packages/cpu cores carrying the load and thus conserving power(with a perf impact based on the workload characteristics... see OLS 2005 CMP kernel scheduler paper for more details..) Signed-off-by: Suresh Siddha Cc: Ingo Molnar Cc: Nick Piggin Cc: Con Kolivas Cc: "Chen, Kenneth W" Cc: "David S. Miller" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] node hotplug: register cpu: remove node struct

2006-06-28T00:32:37Z

With Goto-san's patch, we can add new pgdat/node at runtime. I'm now considering node-hot-add with cpu + memory on ACPI. I found acpi container, which describes node, could evaluate cpu before memory. This means cpu-hot-add occurs before memory hot add. In most part, cpu-hot-add doesn't depend on node hot add. But register_cpu(), which creates symbolic link from node to cpu, requires that node should be onlined before register_cpu(). When a node is onlined, its pgdat should be there. This patch-set holds off creating symbolic link from node to cpu until node is onlined. This removes node arguments from register_cpu(). Now, register_cpu() requires 'struct node' as its argument. But the array of struct node is now unified in driver/base/node.c now (By Goto's node hotplug patch). We can get struct node in generic way. So, this argument is not necessary now. This patch also guarantees add cpu under node only when node is onlined. It is necessary for node-hot-add vs. cpu-hot-add patch following this. Moreover, register_cpu calculates cpu->node_id by cpu_to_node() without regard to its 'struct node *root' argument. This patch removes it. Also modify callers of register_cpu()/unregister_cpu, whose args are changed by register-cpu-remove-node-struct patch. [Brice.Goglin@ens-lyon.org: fix it] Signed-off-by: KAMEZAWA Hiroyuki Cc: Yasunori Goto Cc: Ashok Raj Cc: Dave Hansen Signed-off-by: Brice Goglin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] Check if cpu can be onlined before calling smp_prepare_cpu()

2006-03-25T16:23:01Z

- Moved check for online cpu out of smp_prepare_cpu() - Moved default declaration of smp_prepare_cpu() to kernel/cpu.c - Removed lock_cpu_hotplug() from smp_prepare_cpu() to around it, since its called from cpu_up() as well now. - Removed clearing from cpu_present_map during cpu_offline as it breaks using cpu_up() directly during a subsequent online operation. Signed-off-by: Ashok Raj Cc: Srivatsa Vaddagiri Cc: "Li, Shaohua" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] get_cpu_sysdev() signedness fix

2006-03-20T21:42:59Z

Doing (int < NR_CPUS) doesn't dtrt if it's negative.. Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman