powerpc/pseries: Add kernel parameter to disable batched hcalls

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This introduces a pair of kernel parameters that can be used to disable
the MULTITCE and BULK_REMOVE h-calls.

By default, those hcalls are enabled, active, and good for throughput
and performance.  The ability to disable them will be useful for some of
the PREEMPT_RT related investigation and work occurring on Power.

Signed-off-by: Will Schmidt <will_schmidt@vnet.ibm.com>
cc: Olof Johansson <olof@lixom.net>
cc: Anton Blanchard <anton@samba.org>
cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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Will Schmidt 2010-09-28 15:33:12 +00:00 • committed by Benjamin Herrenschmidt

parent 475fc7c011

commit 4e89a2d8e2

3 changed files with 34 additions and 0 deletions

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8

Documentation/kernel-parameters.txt

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