From: Paul E. McKenney Date: Fri, 27 Apr 2018 20:32:28 +0000 (-0700) Subject: rcu: Convert rcu_check_gp_kthread_starvation() to GP sequence number X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=78c5a67f1788f59d991c8e78d674ad3c8542f0ac;p=openwrt%2Fstaging%2Fblogic.git rcu: Convert rcu_check_gp_kthread_starvation() to GP sequence number This commit switches rcu_check_gp_kthread_starvation() from printing ->gpnum and ->completed to printing ->gp_seq upon detecting a starving RCU grace-period kthread during an RCU CPU stall warning. Signed-off-by: Paul E. McKenney --- diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 547112bec26a..002f85357226 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -1276,9 +1276,9 @@ static void rcu_check_gp_kthread_starvation(struct rcu_state *rsp) j = jiffies; gpa = READ_ONCE(rsp->gp_activity); if (j - gpa > 2 * HZ) { - pr_err("%s kthread starved for %ld jiffies! g%lu c%lu f%#x %s(%d) ->state=%#lx ->cpu=%d\n", + pr_err("%s kthread starved for %ld jiffies! g%ld f%#x %s(%d) ->state=%#lx ->cpu=%d\n", rsp->name, j - gpa, - rsp->gpnum, rsp->completed, + (long)rcu_seq_current(&rsp->gp_seq), rsp->gp_flags, gp_state_getname(rsp->gp_state), rsp->gp_state, rsp->gp_kthread ? rsp->gp_kthread->state : ~0,