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(parent: 7d0842d) | patch
[S390] cio: reduce cpu utilization during device scan
authorPeter Oberparleiter <peter.oberparleiter@de.ibm.com>
Sat, 26 Jan 2008 13:10:48 +0000 (14:10 +0100)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Sat, 26 Jan 2008 13:11:03 +0000 (14:11 +0100)
commitdb1b9eb9152d6c92260625794a10c6a0f573d978
tree0cf697f96e734a846ee1cbc598beebcc7be10117tree | snapshot
parent7d0842d5c185bbdfe888b4d785b67de94f0d3c97commit | diff
[S390] cio: reduce cpu utilization during device scan

Minimize calls to cpu intensive function get_subchannel_by_schid()
by introducing function for_each_subchannel_staged() which
temporarily caches the information about registered subchannels
in a bitmap.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
drivers/s390/cio/chsc.c diff | blob | history
drivers/s390/cio/css.c diff | blob | history
drivers/s390/cio/css.h diff | blob | history
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