From: Keir Fraser <keir.fraser@citrix.com>
Date: Wed, 16 Dec 2009 12:20:08 +0000 (+0000)
Subject: xenoprof: Fix support for active domains
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~12896
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=3cc29c0f268789f120cd5bb5c15b3977bed2c414;p=xen.git

xenoprof: Fix support for active domains

If a user tries to use opcontrol with option --active-domains in dom0
and then run opcontrol in a guest, no samples are generated. When the
guest calls the xenoprof interface it resets the internal Xenoprof
state machine and profiling does not start

Signed-off-by: Jose Renato Santos <jsantos@hpl.hp.com>
---

diff --git a/xen/common/xenoprof.c b/xen/common/xenoprof.c
index ec29e1a1a0..9390d8dc9b 100644
--- a/xen/common/xenoprof.c
+++ b/xen/common/xenoprof.c
@@ -693,7 +693,8 @@ int do_xenoprof_op(int op, XEN_GUEST_HANDLE(void) arg)
     {
     case XENOPROF_init:
         ret = xenoprof_op_init(arg);
-        if ( !ret )
+        if ( (ret == 0) &&
+             (current->domain == xenoprof_primary_profiler) )
             xenoprof_state = XENOPROF_INITIALIZED;
         break;