[S390] cio: reduce cpu utilization during device scan

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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>

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Peter Oberparleiter 2008-01-26 14:10:48 +01:00 • committed by Martin Schwidefsky

parent 4beee64685

commit e82a1567e4

3 changed files with 137 additions and 84 deletions

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96

drivers/s390/cio/chsc.c

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124

drivers/s390/cio/css.c

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3

drivers/s390/cio/css.h

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