diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/smp.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/smp.c b/kernel/smp.c index b484ee6dcaf6..f25e20617b7e 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -254,6 +254,14 @@ static bool csd_lock_wait_toolong(call_single_data_t *csd, u64 ts0, u64 *ts1, in csd_lock_timeout_ns == 0)) return false; + if (ts0 > ts2) { + /* Our own sched_clock went backward; don't blame another CPU. */ + ts_delta = ts0 - ts2; + pr_alert("sched_clock on CPU %d went backward by %llu ns\n", raw_smp_processor_id(), ts_delta); + *ts1 = ts2; + return false; + } + firsttime = !*bug_id; if (firsttime) *bug_id = atomic_inc_return(&csd_bug_count); |