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[S390] fix mismatch in summation of I/O IRQ statistics

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Current IRQ statistics support does not show detail counts for I/O
interrupts which are processed internally only. The result is a
summation count which is way off such as this one:

           CPU0       CPU1       CPU2
I/O:       1331        710        442
[...]
QAI:         15         16         16   [I/O] QDIO Adapter Interrupt
QDI:          1          0          0   [I/O] QDIO Interrupt
DAS:        706        645        381   [I/O] DASD
C15:         26         10          0   [I/O] 3215
C70:          0          0          0   [I/O] 3270
TAP:          0          0          0   [I/O] Tape
VMR:          0          0          0   [I/O] Unit Record Devices
LCS:          0          0          0   [I/O] LCS
CLW:          0          0          0   [I/O] CLAW
CTC:          0          0          0   [I/O] CTC
APB:          0          0          0   [I/O] AP Bus

Fix this by moving I/O interrupt accounting into the common I/O layer.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Peter Oberparleiter
2011-10-30 15:16:04 +01:00
committed by Martin Schwidefsky
parent ce949717b5
commit de400d6b78
20 changed files with 56 additions and 24 deletions
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13
drivers/s390/cio/device.c
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@@ -21,6 +21,7 @@
#include <linux/device.h>
#include <linux/workqueue.h>
#include <linux/timer.h>
#include <linux/kernel_stat.h>
#include <asm/ccwdev.h>
#include <asm/cio.h>
@@ -747,6 +748,7 @@ static int io_subchannel_initialize_dev(struct subchannel *sch,
struct ccw_device *cdev)
{
cdev->private->cdev = cdev;
cdev->private->int_class = IOINT_CIO;
atomic_set(&cdev->private->onoff, 0);
cdev->dev.parent = &sch->dev;
cdev->dev.release = ccw_device_release;
@@ -1010,6 +1012,8 @@ static void io_subchannel_irq(struct subchannel *sch)
CIO_TRACE_EVENT(6, dev_name(&sch->dev));
if (cdev)
dev_fsm_event(cdev, DEV_EVENT_INTERRUPT);
else
kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
}
void io_subchannel_init_config(struct subchannel *sch)
@@ -1621,6 +1625,7 @@ ccw_device_probe_console(void)
memset(&console_private, 0, sizeof(struct ccw_device_private));
console_cdev.private = &console_private;
console_private.cdev = &console_cdev;
console_private.int_class = IOINT_CIO;
ret = ccw_device_console_enable(&console_cdev, sch);
if (ret) {
cio_release_console();
@@ -1702,11 +1707,18 @@ ccw_device_probe (struct device *dev)
int ret;
cdev->drv = cdrv; /* to let the driver call _set_online */
/* Note: we interpret class 0 in this context as an uninitialized
* field since it translates to a non-I/O interrupt class. */
if (cdrv->int_class != 0)
cdev->private->int_class = cdrv->int_class;
else
cdev->private->int_class = IOINT_CIO;
ret = cdrv->probe ? cdrv->probe(cdev) : -ENODEV;
if (ret) {
cdev->drv = NULL;
cdev->private->int_class = IOINT_CIO;
return ret;
}
@@ -1740,6 +1752,7 @@ ccw_device_remove (struct device *dev)
}
ccw_device_set_timeout(cdev, 0);
cdev->drv = NULL;
cdev->private->int_class = IOINT_CIO;
return 0;
}