tree f8901ab07b0076f6614887fb8fe63e8b7c2cae45
parent d307297f73077b4dc8110eb998108ffc467e8e6c
author Jan Glauber <jang@linux.vnet.ibm.com> 1267220257 +0100
committer Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> 1267220251 +0100

[S390] qdio: optimize cache line usage of struct qdio_irq

Remove a memset hack that relied on the internal layout of the
qdio_irq struct and move the per device statistics data into an own
cache line to avoid cache line bashing between the inbound and the
outbound queue tasklets. Also reduce the number of allocated queues
from 32 to 4 which is the current maximum. That saves a cache line
in struct qdio_irq.

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