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xen/spinlock: Document the xen_nopvspin parameter. 

Which disables in the ticketlock slowpath the Xen PV optimization's.
Useful for diagnosing issues and comparing benchmarks in
over-commit CPU scenarios.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
wifi-calibration
Konrad Rzeszutek Wilk 2013-09-25 10:07:20 -04:00
parent 0160676bba
commit 15a3eac078
1 changed files with 4 additions and 0 deletions
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4
Documentation/kernel-parameters.txt
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@ -3412,6 +3412,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
the unplug protocol
never -- do not unplug even if version check succeeds
xen_nopvspin [X86,XEN]
Disables the ticketlock slowpath using Xen PV
optimizations.
xirc2ps_cs= [NET,PCMCIA]
Format:
<irq>,<irq_mask>,<io>,<full_duplex>,<do_sound>,<lockup_hack>[,<irq2>[,<irq3>[,<irq4>]]]