linux/kernel/taskstats.c, branch v2.6.30

cpumask: convert rest of files in kernel/

2008-12-31T23:42:28Z

Impact: Reduce stack usage, use new cpumask API. Mainly changing cpumask_t to 'struct cpumask' and similar simple API conversion. Two conversions worth mentioning: 1) we use cpumask_any_but to avoid a temporary in kernel/softlockup.c, 2) Use cpumask_var_t in taskstats_user_cmd(). Signed-off-by: Rusty Russell Signed-off-by: Mike Travis Cc: Balbir Singh Cc: Ingo Molnar

cpumask: change cpumask_scnprintf, cpumask_parse_user, cpulist_parse, and cpulist_scnprintf to take pointers.

2008-12-13T10:50:25Z

Impact: change calling convention of existing cpumask APIs Most cpumask functions started with cpus_: these have been replaced by cpumask_ ones which take struct cpumask pointers as expected. These four functions don't have good replacement names; fortunately they're rarely used, so we just change them over. Signed-off-by: Rusty Russell Signed-off-by: Mike Travis Acked-by: Ingo Molnar Cc: paulus@samba.org Cc: mingo@redhat.com Cc: tony.luck@intel.com Cc: ralf@linux-mips.org Cc: Greg Kroah-Hartman Cc: cl@linux-foundation.org Cc: srostedt@redhat.com

taskstats: remove initialization of static per-cpu variable

2008-07-25T17:53:47Z

Cc: Shailabh Nagar Signed-off-by: Vegard Nossum Cc: Balbir Singh Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

core: use performance variant for_each_cpu_mask_nr

2008-05-23T16:35:12Z

Change references from for_each_cpu_mask to for_each_cpu_mask_nr where appropriate Reviewed-by: Paul Jackson Reviewed-by: Christoph Lameter Signed-off-by: Mike Travis Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner

Use find_task_by_vpid in taskstats

2008-04-30T15:29:48Z

The pid to lookup a task by is passed inside taskstats code via genetlink message. Since netlink packets are now processed in the context of the sending task, this is correct to lookup the task with find_task_by_vpid() here. Besides, I fix the call to fill_pid() from taskstats_exit(), since the tsk->pid is not required in fill_pid() in this case, and the pid field on task_struct is going to be deprecated as well. Signed-off-by: Pavel Emelyanov Cc: "Eric W. Biederman" Cc: Balbir Singh Cc: Jay Lan Cc: Jonathan Lim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

kernel/taskstats.c: fix bogus nlmsg_free()

2007-11-15T02:45:44Z

We'd better not nlmsg_free on a pointer containing an undefined value (and without having anything allocated). Spotted by the Coverity checker. Signed-off-by: Adrian Bunk Acked-by: Balbir Singh Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Fix misspellings of "system", "controller", "interrupt" and "necessary".

2007-10-19T21:10:43Z

Fix the various misspellings of "system", controller", "interrupt" and "[un]necessary". Signed-off-by: Robert P. J. Day Signed-off-by: Adrian Bunk

Add cgroupstats

2007-10-19T18:53:36Z

This patch is inspired by the discussion at http://lkml.org/lkml/2007/4/11/187 and implements per cgroup statistics as suggested by Andrew Morton in http://lkml.org/lkml/2007/4/11/263. The patch is on top of 2.6.21-mm1 with Paul's cgroups v9 patches (forward ported) This patch implements per cgroup statistics infrastructure and re-uses code from the taskstats interface. A new set of cgroup operations are registered with commands and attributes. It should be very easy to *extend* per cgroup statistics, by adding members to the cgroupstats structure. The current model for cgroupstats is a pull, a push model (to post statistics on interesting events), should be very easy to add. Currently user space requests for statistics by passing the cgroup file descriptor. Statistics about the state of all the tasks in the cgroup is returned to user space. TODO's/NOTE: This patch provides an infrastructure for implementing cgroup statistics. Based on the needs of each controller, we can incrementally add more statistics, event based support for notification of statistics, accumulation of taskstats into cgroup statistics in the future. Sample output # ./cgroupstats -C /cgroup/a sleeping 2, blocked 0, running 1, stopped 0, uninterruptible 0 # ./cgroupstats -C /cgroup/ sleeping 154, blocked 0, running 0, stopped 0, uninterruptible 0 If the approach looks good, I'll enhance and post the user space utility for the same Feedback, comments, test results are always welcome! [akpm@linux-foundation.org: build fix] Signed-off-by: Balbir Singh Cc: Paul Menage Cc: Jay Lan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Clean up duplicate includes in kernel/

2007-10-17T15:42:48Z

This patch cleans up duplicate includes in kernel/ Signed-off-by: Jesper Juhl Acked-by: Paul E. McKenney Reviewed-by: Satyam Sharma Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

taskstats: add context-switch counters

2007-07-16T16:05:46Z

Make available to the user the following task and process performance statistics: * Involuntary Context Switches (task_struct->nivcsw) * Voluntary Context Switches (task_struct->nvcsw) Statistics information is available from: 1. taskstats interface (Documentation/accounting/) 2. /proc/PID/status (task only). This data is useful for detecting hyperactivity patterns between processes. [akpm@linux-foundation.org: cleanup] Signed-off-by: Maxim Uvarov Cc: Shailabh Nagar Cc: Balbir Singh Cc: Jay Lan Cc: Jonathan Lim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds