diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index ea05c59096a219dff4defdcb2580a748d5b861bd..a0dc5385bcbcebbb39a71117a18515be717ca333 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -490,7 +490,8 @@ void rcu_all_qs(void) } EXPORT_SYMBOL_GPL(rcu_all_qs); -#define DEFAULT_RCU_BLIMIT 10 /* Maximum callbacks per rcu_do_batch. */ +#define DEFAULT_RCU_BLIMIT 10 /* Maximum callbacks per rcu_do_batch ... */ +#define DEFAULT_MAX_RCU_BLIMIT 10000 /* ... even during callback flood. */ static long blimit = DEFAULT_RCU_BLIMIT; #define DEFAULT_RCU_QHIMARK 10000 /* If this many pending, ignore blimit. */ static long qhimark = DEFAULT_RCU_QHIMARK; @@ -2604,7 +2605,7 @@ static void rcu_do_batch(struct rcu_state *rsp, struct rcu_data *rdp) /* Reinstate batch limit if we have worked down the excess. */ count = rcu_segcblist_n_cbs(&rdp->cblist); - if (rdp->blimit == LONG_MAX && count <= qlowmark) + if (rdp->blimit >= DEFAULT_MAX_RCU_BLIMIT && count <= qlowmark) rdp->blimit = blimit; /* Reset ->qlen_last_fqs_check trigger if enough CBs have drained. */ @@ -2940,7 +2941,7 @@ static void __call_rcu_core(struct rcu_state *rsp, struct rcu_data *rdp, rcu_accelerate_cbs_unlocked(rsp, rdp->mynode, rdp); } else { /* Give the grace period a kick. */ - rdp->blimit = LONG_MAX; + rdp->blimit = DEFAULT_MAX_RCU_BLIMIT; if (rsp->n_force_qs == rdp->n_force_qs_snap && rcu_segcblist_first_pend_cb(&rdp->cblist) != head) force_quiescent_state(rsp);