diff options
| author | Julian Wiedmann <jwi@linux.ibm.com> | 2020-09-15 10:04:39 +0300 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2021-02-09 17:57:04 +0300 |
| commit | bd83917155c1e60a6634dfef708972076b068c6e (patch) | |
| tree | 5d3e69938e51504989a0be8a96337c5e0359dfb7 /drivers/s390/cio/qdio_main.c | |
| parent | 954d6235be412e3de33a43e68ab39342f5eccf9b (diff) | |
| download | linux-bd83917155c1e60a6634dfef708972076b068c6e.tar.xz | |
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 <jwi@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'drivers/s390/cio/qdio_main.c')
| -rw-r--r-- | drivers/s390/cio/qdio_main.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c index 3b1e8ed4ba14..c56b690f0a93 100644 --- a/drivers/s390/cio/qdio_main.c +++ b/drivers/s390/cio/qdio_main.c @@ -804,6 +804,7 @@ static void qdio_int_handler_pci(struct qdio_irq *irq_ptr) return; qdio_deliver_irq(irq_ptr); + irq_ptr->last_data_irq_time = S390_lowcore.int_clock; if (!pci_out_supported(irq_ptr) || !irq_ptr->scan_threshold) return; |