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| author | Jan Glauber <jang@linux.vnet.ibm.com> | 2011-01-05 12:47:50 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2011-01-05 12:47:28 +0100 |
| commit | 3d6c76ff32bb9b2ebf6e859855d315eb42e3df50 (patch) | |
| tree | 3a69d4f3023e75fee0bc55ba38ca7a54a8e4760c /arch/s390/include/asm/qdio.h | |
| parent | 4f325184f2d4c1f2258873b2a333005dc4dfcbc0 (diff) | |
| download | lwn-3d6c76ff32bb9b2ebf6e859855d315eb42e3df50.tar.gz lwn-3d6c76ff32bb9b2ebf6e859855d315eb42e3df50.zip | |
[S390] qdio: outbound tasklet scan threshold
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>
Diffstat (limited to 'arch/s390/include/asm/qdio.h')
| -rw-r--r-- | arch/s390/include/asm/qdio.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h index 46e96bc1f5a1..350e7ee5952d 100644 --- a/arch/s390/include/asm/qdio.h +++ b/arch/s390/include/asm/qdio.h @@ -361,6 +361,7 @@ struct qdio_initialize { qdio_handler_t *input_handler; qdio_handler_t *output_handler; void (*queue_start_poll) (struct ccw_device *, int, unsigned long); + int scan_threshold; unsigned long int_parm; void **input_sbal_addr_array; void **output_sbal_addr_array; |