Messages in this thread | | | Date | Mon, 1 Aug 2016 10:11:39 -0400 | From | Konrad Rzeszutek Wilk <> | Subject | Re: [Xen-devel] [PATCH] xen: Make VPMU init message look less scary |
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On Mon, Aug 01, 2016 at 01:41:20PM +0200, Juergen Gross wrote: > The default for the Xen hypervisor is to not enable VPMU in order to > avoid security issues. In this case the Linux kernel will issue the > message "Could not initialize VPMU for cpu 0, error -95" which looks > more like an error than a normal state. > > Change the message to something less scary in case the hypervisor > returns EOPNOTSUPP when trying to activate VPMU. > > Signed-off-by: Juergen Gross <jgross@suse.com> > --- > arch/x86/xen/pmu.c | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/xen/pmu.c b/arch/x86/xen/pmu.c > index 32bdc2c..e9d66fa 100644 > --- a/arch/x86/xen/pmu.c > +++ b/arch/x86/xen/pmu.c > @@ -547,8 +547,11 @@ void xen_pmu_init(int cpu) > return; > > fail: > - pr_info_once("Could not initialize VPMU for cpu %d, error %d\n", > - cpu, err); > + if (err == -EOPNOTSUPP) > + pr_info_once("VPMU usage disabled due to Xen settings\n");
How about 'VPMU disabled by hypevisor.'
> + else > + pr_info_once("Could not initialize VPMU for cpu %d, error %d\n", > + cpu, err); > free_pages((unsigned long)xenpmu_data, 0); > } > > -- > 2.6.6 > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > https://lists.xen.org/xen-devel
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