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[S390] cpu topology: introduce kernel parameter

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Introduce a topology=[on|off] kernel parameter which allows to switch
cpu topology on/off. Default will be off, since it looks like that for
some workloards this doesn't behave very well (on s390).

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens
2008-12-25 13:39:23 +01:00
committed by Martin Schwidefsky
parent 9fee8db222
commit 2b1a61f0a8
2 changed files with 19 additions and 1 deletions
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8
Documentation/kernel-parameters.txt
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@@ -2252,6 +2252,14 @@ and is between 256 and 4096 characters. It is defined in the file
See comment before function dc390_setup() in
drivers/scsi/tmscsim.c.
topology= [S390]
Format: {off | on}
Specify if the kernel should make use of the cpu
topology informations if the hardware supports these.
The scheduler will make use of these informations and
e.g. base its process migration decisions on it.
Default is off.
tp720= [HW,PS2]
trix= [HW,OSS] MediaTrix AudioTrix Pro