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authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2013-09-25 10:07:20 -0400
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2013-09-25 10:07:34 -0400
commit15a3eac0784edb73cb2ec0f0c97705ba4bd39b3f (patch)
tree6bd3453615be6d634cee4abe28844b8ac769305f /Documentation
parent0160676bba69523e8b0ac83f306cce7d342ed7c8 (diff)
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>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kernel-parameters.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 7f9d4f53882c..b9589127b3ee 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -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>]]]