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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2011-05-12 01:08:07 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-05-19 23:25:29 +0200 |
| commit | 80d02085d99039b3b7f3a73c8896226b0cb1ba07 (patch) | |
| tree | c310902423ecb00effadcb59c60cbf118d4037cb /kernel/rcutree_trace.c | |
| parent | 11c476f31a0fabc6e604da5b09a6590b57c3fb20 (diff) | |
| download | lwn-80d02085d99039b3b7f3a73c8896226b0cb1ba07.tar.gz lwn-80d02085d99039b3b7f3a73c8896226b0cb1ba07.zip | |
Revert "rcu: Decrease memory-barrier usage based on semi-formal proof"
This reverts commit e59fb3120becfb36b22ddb8bd27d065d3cdca499.
This reversion was due to (extreme) boot-time slowdowns on SPARC seen by
Yinghai Lu and on x86 by Ingo
.
This is a non-trivial reversion due to intervening commits.
Conflicts:
Documentation/RCU/trace.txt
kernel/rcutree.c
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/rcutree_trace.c')
| -rw-r--r-- | kernel/rcutree_trace.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c index 9678cc3650f5..aa0fd72b4bc7 100644 --- a/kernel/rcutree_trace.c +++ b/kernel/rcutree_trace.c @@ -69,10 +69,10 @@ static void print_one_rcu_data(struct seq_file *m, struct rcu_data *rdp) rdp->passed_quiesc, rdp->passed_quiesc_completed, rdp->qs_pending); #ifdef CONFIG_NO_HZ - seq_printf(m, " dt=%d/%d/%d df=%lu", - atomic_read(&rdp->dynticks->dynticks), + seq_printf(m, " dt=%d/%d dn=%d df=%lu", + rdp->dynticks->dynticks, rdp->dynticks->dynticks_nesting, - rdp->dynticks->dynticks_nmi_nesting, + rdp->dynticks->dynticks_nmi, rdp->dynticks_fqs); #endif /* #ifdef CONFIG_NO_HZ */ seq_printf(m, " of=%lu ri=%lu", rdp->offline_fqs, rdp->resched_ipi); @@ -141,9 +141,9 @@ static void print_one_rcu_data_csv(struct seq_file *m, struct rcu_data *rdp) rdp->qs_pending); #ifdef CONFIG_NO_HZ seq_printf(m, ",%d,%d,%d,%lu", - atomic_read(&rdp->dynticks->dynticks), + rdp->dynticks->dynticks, rdp->dynticks->dynticks_nesting, - rdp->dynticks->dynticks_nmi_nesting, + rdp->dynticks->dynticks_nmi, rdp->dynticks_fqs); #endif /* #ifdef CONFIG_NO_HZ */ seq_printf(m, ",%lu,%lu", rdp->offline_fqs, rdp->resched_ipi); @@ -167,7 +167,7 @@ static int show_rcudata_csv(struct seq_file *m, void *unused) { seq_puts(m, "\"CPU\",\"Online?\",\"c\",\"g\",\"pq\",\"pqc\",\"pq\","); #ifdef CONFIG_NO_HZ - seq_puts(m, "\"dt\",\"dt nesting\",\"dt NMI nesting\",\"df\","); + seq_puts(m, "\"dt\",\"dt nesting\",\"dn\",\"df\","); #endif /* #ifdef CONFIG_NO_HZ */ seq_puts(m, "\"of\",\"ri\",\"ql\",\"b\",\"ci\",\"co\",\"ca\"\n"); #ifdef CONFIG_TREE_PREEMPT_RCU |