[S390] qdio: outbound tasklet scan threshold

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Introduce a scan treshold for the qdio outbound queues. By setting the
threshold the driver can tell qdio after how much used SBALs qdio
should schedule the outbound tasklet that scans the queue for finished
SBALs. The threshold is specific by the drivers because a
Hipersockets device is much faster in utilizing outbound buffers than a
ZFCP or OSA device.

The default values after how many used SBALs the tasklet should run are:

OSA:          > 31 SBALs
Hipersockets: > 7 SBALs
zfcp:         > 55 SBALs

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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This commit is contained in:

Jan Glauber 2011-01-05 12:47:50 +01:00 • committed by Martin Schwidefsky

parent 4f325184f2

commit 3d6c76ff32

6 changed files with 15 additions and 1 deletions

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1

arch/s390/include/asm/qdio.h

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2

drivers/s390/cio/qdio.h

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8

drivers/s390/cio/qdio_main.c

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1

drivers/s390/cio/qdio_setup.c

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2

drivers/s390/net/qeth_core_main.c

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2

drivers/s390/scsi/zfcp_qdio.c

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