[RFC v2 0/2] /proc/sched_stat and /proc/sched_debug fail at 4096

[Nathan Zimmer]

When running with 4096 cores attemping to read /proc/sched_stat and
/proc/sched_debug will fail with an ENOMEM condition.
On a sufficantly large systems the total amount of data is more then 4mb, so
it won't fit into a single buffer.

/proc/timer_list also fails in a similar way.  However timer_list has two 
seperate per online cpu loops which will require a bit more thought.

Nathan Zimmer (2):
  procfs: /proc/sched_stat fails on very very large machines.
  procfs: /proc/sched_debug fails on very very large machines.

 kernel/sched/debug.c |   73 +++++++++++++++++++++---
 kernel/sched/stats.c |  154 ++++++++++++++++++++++++++++++-------------------
 2 files changed, 159 insertions(+), 68 deletions(-)

CC: Ingo Molnar <mingo@xxxxxxxxxx>
CC: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CC: linux-kernel@xxxxxxxxxxxxxxx
CC: Al Viro <viro@xxxxxxxxxxxxxxxxxx>

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