Kevin, thanks, that fixed the issue of the ondemand govenor with
cpufreq=dom0-kernel.
Keir, the other very strange issues (higher load when being the first DomU
started, blocking
of /etc/init.d/xendomains when a certain DomU is first), I will try to
investigate further
and post again when I have more information, so that this theat is not getting
more complex.
BR,
Carsten.
----- Originalnachricht -----
Von: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
Gesendet: Mit, 3.6.2009 02:49
An: Carsten Schiers <carsten@xxxxxxxxxx> ; keir.fraser
<keir.fraser@xxxxxxxxxxxxx> ; xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> ;
mark.langsdorf@xxxxxxx
Betreff: RE: AW: Re: AW: Re: [Xen-devel] Xen 3.4 strange behaviour as compared
to Xen 3.3.1
>From: Carsten Schiers
>Sent: 2009年6月3日 0:18
>
>Sorry, I think it could also be that the CPU mask is somehow
>modified in the
>hypercall itself. Too much code for me to realy understand.
>
>Just a guess, but does Changeset 18898 take care of
>cpufreq=dom0-kernel case? It's
>patching the hypercall 52 and the cpufreq_ondemand.c of Xen
>near a modfication of
>a CPU mask variable, but no change in the cpufreq_ondemand.c
>of the Dom0 kernel.
>It also seems to fit into the time window, doesn't it?
>
That's really a silly typo. Could you try whether below fixes for you?
diff -r e8b74e981bfb xen/arch/x86/platform_hypercall.c
--- a/xen/arch/x86/platform_hypercall.c Tue Jun 02 18:58:09 2009 +0800
+++ b/xen/arch/x86/platform_hypercall.c Tue Jun 02 18:59:18 2009 +0800
@@ -313,7 +313,6 @@ ret_t do_platform_op(XEN_GUEST_HANDLE(xe
{
uint32_t cpu;
uint64_t idletime, now = NOW();
- struct vcpu *v;
struct xenctl_cpumap ctlmap;
cpumask_t cpumap;
XEN_GUEST_HANDLE(uint8) cpumap_bitmap;
@@ -336,7 +335,7 @@ ret_t do_platform_op(XEN_GUEST_HANDLE(xe
for_each_cpu_mask ( cpu, cpumap )
{
- if ( (v = idle_vcpu[cpu]) != NULL )
+ if ( !idle_vcpu[cpu] )
cpu_clear(cpu, cpumap);
idletime = get_cpu_idle_time(cpu);
Thanks
Kevin
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