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Hi ALL,


i have install the xen-xapi on centos 6, and may be we can support the ionice back to none.
please check an review.




From c1f5cf58a9d5a24cb98710aab142fc663807dad3 Mon Sep 17 00:00:00 2001
From: root <yili@winhong.com>
Date: Fri, 15 May 2015 19:57:06 -0400
Subject: [PATCH] Add default none qos_scheduler for ionice


The ionice has support 4 scheduling classes
"The scheduling class. 0 for none, 1 for real time, 2 for best-effort, 3 for idle."


Signed-off-by: Yi Li <yili@winhong.com>
---
ocaml/xapi/xapi_xenops.ml | 3 ++-
ocaml/xenops/ionice.ml | 3 +++
ocaml/xenops/xenops_interface.ml | 1 +
3 files changed, 6 insertions(+), 1 deletion(-)


diff --git a/ocaml/xapi/xapi_xenops.ml b/ocaml/xapi/xapi_xenops.ml
index 47c6737..d11c91e 100644
--- a/ocaml/xapi/xapi_xenops.ml
+++ b/ocaml/xapi/xapi_xenops.ml
@@ -360,8 +360,9 @@ module MD = struct
| "rt" | "real-time" -> RealTime (qos_class params)
| "idle" -> Idle
| "best-effort" -> BestEffort (qos_class params)
+ | "none" -> Default (qos_class params)
| _ ->
- warn "Unknown VBD QoS scheduler (try 'real-time' 'idle' 'best-effort')";
+ warn "Unknown VBD QoS scheduler (try 'real-time' 'idle' 'best-effort' 'none')";
BestEffort (qos_class params)
with Not_found ->
BestEffort (qos_class params) in
diff --git a/ocaml/xenops/ionice.ml b/ocaml/xenops/ionice.ml
index 37ebd2a..f235e53 100644
--- a/ocaml/xenops/ionice.ml
+++ b/ocaml/xenops/ionice.ml
@@ -28,6 +28,7 @@ let to_class_param =
| RealTime x -> 1, (to_param x)
| Idle -> 3, (to_param Lowest)
| BestEffort x -> 2, (to_param x)
+ | Default x -> 0, (to_param x)

let of_class_param_exn cls param =
let param = match param with
@@ -44,6 +45,8 @@ let of_class_param_exn cls param =
| "1" -> RealTime param
| "best-effort"
| "2" -> BestEffort param
+ | "none"
+ | "0" ->Default param
| _ -> raise Not_found (* caught below *)

exception Parse_failed of string
diff --git a/ocaml/xenops/xenops_interface.ml b/ocaml/xenops/xenops_interface.ml
index abcf1d2..6f894a1 100644
--- a/ocaml/xenops/xenops_interface.ml
+++ b/ocaml/xenops/xenops_interface.ml
@@ -231,6 +231,7 @@ module Vbd = struct
| RealTime of qos_class
| Idle
| BestEffort of qos_class
+ | Default of qos_class
type qos =
| Ionice of qos_scheduler

--
1.7.12.4