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 <mi...@redhat.com> CC: Peter Zijlstra <pet...@infradead.org> CC: linux-kernel@vger.kernel.org CC: Al Viro <v...@zeniv.linux.org.uk> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
