From bd83917155c1e60a6634dfef708972076b068c6e Mon Sep 17 00:00:00 2001 From: Julian Wiedmann Date: Tue, 15 Sep 2020 10:04:39 +0300 Subject: s390/qdio: track time of last data IRQ for each device We currently track the time of the most recent QDIO Adapter Interrupt. This is a system-wide timestamp (as such interrupts are not bound to one specific qdio device). If interrupt processing stalls on one device but is functional for a different device, the timestamp continues to be updated and is of no help for problem diagnosis. So for debugging purposes also track the time of the last Data IRQ on a per-device level. Collect this data in the legacy non-AI path as well. Signed-off-by: Julian Wiedmann Reviewed-by: Benjamin Block Signed-off-by: Vasily Gorbik --- drivers/s390/cio/qdio_debug.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers/s390/cio/qdio_debug.c') diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c index 728abf7e9ccb..d091ae12c367 100644 --- a/drivers/s390/cio/qdio_debug.c +++ b/drivers/s390/cio/qdio_debug.c @@ -105,8 +105,9 @@ static int qstat_show(struct seq_file *m, void *v) if (!q) return 0; - seq_printf(m, "Timestamp: %Lx Last AI: %Lx\n", - q->timestamp, last_ai_time); + seq_printf(m, "Timestamp: %llx\n", q->timestamp); + seq_printf(m, "Last Data IRQ: %llx Last AI: %llx\n", + q->irq_ptr->last_data_irq_time, last_ai_time); seq_printf(m, "nr_used: %d ftc: %d\n", atomic_read(&q->nr_buf_used), q->first_to_check); if (q->is_input_q) { -- cgit v1.2.3