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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2012-04-26 13:12:27 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-05-09 15:00:49 +0200 |
| commit | c82513e513556a04f81aa511cd890acd23349c48 (patch) | |
| tree | dbccd379fffd75cd87513e4dd0e91ac597628382 /kernel/sched/debug.c | |
| parent | ad7687dde8780a0d618a3e3b5a62bb383696fc22 (diff) | |
| download | op-kernel-dev-c82513e513556a04f81aa511cd890acd23349c48.zip op-kernel-dev-c82513e513556a04f81aa511cd890acd23349c48.tar.gz | |
sched: Change rq->nr_running to unsigned int
Since there's a PID space limit of 30bits (see
futex.h:FUTEX_TID_MASK) and allocating that many tasks (assuming a
lower bound of 2 pages per task) would still take 8T of memory it
seems reasonable to say that unsigned int is sufficient for
rq->nr_running.
When we do get anywhere near that amount of tasks I suspect other
things would go funny, load-balancer load computations would really
need to be hoisted to 128bit etc.
So save a few bytes and convert rq->nr_running and friends to
unsigned int.
Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-y3tvyszjdmbibade5bw8zl81@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/debug.c')
| -rw-r--r-- | kernel/sched/debug.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c index 09acaa1..31e4f61 100644 --- a/kernel/sched/debug.c +++ b/kernel/sched/debug.c @@ -202,7 +202,7 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) SPLIT_NS(spread0)); SEQ_printf(m, " .%-30s: %d\n", "nr_spread_over", cfs_rq->nr_spread_over); - SEQ_printf(m, " .%-30s: %ld\n", "nr_running", cfs_rq->nr_running); + SEQ_printf(m, " .%-30s: %d\n", "nr_running", cfs_rq->nr_running); SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight); #ifdef CONFIG_FAIR_GROUP_SCHED #ifdef CONFIG_SMP |
