ipmi: add parameter to limit CPU usage in kipmid

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In some cases kipmid can use a lot of CPU.  This adds a way to tune the
CPU used by kipmid to help in those cases.  By setting kipmid_max_busy_us
to a value between 100 and 500, it is possible to bring down kipmid CPU
load to practically 0 without loosing too much ipmi throughput
performance.  Not setting the value, or setting the value to zero,
operation is unaffected.

Signed-off-by: Martin Wilck <martin.wilck@ts.fujitsu.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Martin Wilck 2010-03-10 15:23:06 -08:00 • committed by Linus Torvalds

parent f1eb1332b8

commit ae74e823cb

2 changed files with 76 additions and 2 deletions

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12

Documentation/IPMI.txt

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66

drivers/char/ipmi/ipmi_si_intf.c

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