diff options
Diffstat (limited to 'kernel/rcutree.c')
| -rw-r--r-- | kernel/rcutree.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c index a7c6bce1af8..45dcc2036a1 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -52,6 +52,9 @@ #include <linux/prefetch.h> #include "rcutree.h" +#include <trace/events/rcu.h> + +#include "rcu.h" /* Data structures. */ @@ -1190,17 +1193,22 @@ static void rcu_do_batch(struct rcu_state *rsp, struct rcu_data *rdp) { unsigned long flags; struct rcu_head *next, *list, **tail; - int count; + int bl, count; /* If no callbacks are ready, just return.*/ - if (!cpu_has_callbacks_ready_to_invoke(rdp)) + if (!cpu_has_callbacks_ready_to_invoke(rdp)) { + trace_rcu_batch_start(0, 0); + trace_rcu_batch_end(0); return; + } /* * Extract the list of ready callbacks, disabling to prevent * races with call_rcu() from interrupt handlers. */ local_irq_save(flags); + bl = rdp->blimit; + trace_rcu_batch_start(rdp->qlen, bl); list = rdp->nxtlist; rdp->nxtlist = *rdp->nxttail[RCU_DONE_TAIL]; *rdp->nxttail[RCU_DONE_TAIL] = NULL; @@ -1218,11 +1226,12 @@ static void rcu_do_batch(struct rcu_state *rsp, struct rcu_data *rdp) debug_rcu_head_unqueue(list); __rcu_reclaim(list); list = next; - if (++count >= rdp->blimit) + if (++count >= bl) break; } local_irq_save(flags); + trace_rcu_batch_end(count); /* Update count, and requeue any remaining callbacks. */ rdp->qlen -= count; |