diff options
| -rw-r--r-- | kernel/rcu/rcutorture.c | 9 | ||||
| -rwxr-xr-x | tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh | 2 |
2 files changed, 10 insertions, 1 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 1e8360d15920..33ea446101b3 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -2170,6 +2170,7 @@ struct rcu_fwd { static DEFINE_MUTEX(rcu_fwd_mutex); static struct rcu_fwd *rcu_fwds; static unsigned long rcu_fwd_seq; +static atomic_long_t rcu_fwd_max_cbs; static bool rcu_fwd_emergency_stop; static void rcu_torture_fwd_cb_hist(struct rcu_fwd *rfp) @@ -2428,6 +2429,7 @@ static void rcu_torture_fwd_prog_cr(struct rcu_fwd *rfp) n_launders + n_max_cbs - n_launders_cb_snap, n_launders, n_launders_sa, n_max_gps, n_max_cbs, cver, gps); + atomic_long_add(n_max_cbs, &rcu_fwd_max_cbs); rcu_torture_fwd_cb_hist(rfp); } schedule_timeout_uninterruptible(HZ); /* Let CBs drain. */ @@ -2489,6 +2491,8 @@ static struct notifier_block rcutorture_oom_nb = { /* Carry out grace-period forward-progress testing. */ static int rcu_torture_fwd_prog(void *args) { + bool firsttime = true; + long max_cbs; int oldnice = task_nice(current); unsigned long oldseq = READ_ONCE(rcu_fwd_seq); struct rcu_fwd *rfp = args; @@ -2503,6 +2507,11 @@ static int rcu_torture_fwd_prog(void *args) if (!rfp->rcu_fwd_id) { schedule_timeout_interruptible(fwd_progress_holdoff * HZ); WRITE_ONCE(rcu_fwd_emergency_stop, false); + if (!firsttime) { + max_cbs = atomic_long_xchg(&rcu_fwd_max_cbs, 0); + pr_alert("%s n_max_cbs: %ld\n", __func__, max_cbs); + } + firsttime = false; WRITE_ONCE(rcu_fwd_seq, rcu_fwd_seq + 1); } else { while (READ_ONCE(rcu_fwd_seq) == oldseq) diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh index fbdf162b6acd..1c4c2c727dad 100755 --- a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh +++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh @@ -25,7 +25,7 @@ stopstate="`grep 'End-test grace-period state: g' $i/console.log 2> /dev/null | tail -1 | sed -e 's/^\[[ 0-9.]*] //' | awk '{ print \"[\" $1 \" \" $5 \" \" $6 \" \" $7 \"]\"; }' | tr -d '\012\015'`" -fwdprog="`grep 'rcu_torture_fwd_prog_cr Duration' $i/console.log 2> /dev/null | sed -e 's/^\[[^]]*] //' | sort -k15nr | head -1 | awk '{ print $14 " " $15 }'`" +fwdprog="`grep 'rcu_torture_fwd_prog n_max_cbs: ' $i/console.log 2> /dev/null | sed -e 's/^\[[^]]*] //' | sort -k3nr | head -1 | awk '{ print $2 " " $3 }'`" if test -z "$ngps" then echo "$configfile ------- " $stopstate |