Re: [Xen-devel] Performance problem about address translation

[xinyue <xinyue@xxxxxxxxxxxxxxx>]

Very sorry for sending wrong before.
On 2015å07æ08æ 14:13, xinyue wrote:
> On 2015å07æ07æ 19:49, Ian Campbell wrote:
> > On Tue, 2015-07-07 at 11:24 +0800, xinyue wrote:
> >
> > Please don't use HTML mail and do proper ">" quoting
> >
> > > And after analyzing the performance of hvm domu, I found a process
> > > named "evolution-data-" using almost 99.9% cpu. Does someone known
> > > what's this and why it appears?
> > evolution-data-server is part of the evolution mail client. It has
> > nothing to do with Xen I'm afraid so you will have to look elsewhere for
> > why it is taking so much CPU.
> >
> > Ian.
Sorry for that and thanks very much.

I think the problem maybe caused by the address alignment. The HVM DomU 
crashed after the hypercall and Dom0 crashed later sometimes with "Bus 
error".
I think the function that caused the crash is get_gfn. The related code is

    unsigned long gfn;
    unsigned long mfn;
    struct vcpu *vcpu = current;
    struct domain *d = vcpu->domain;
    uint32_t pfec = PFEC_page_present;
    p2m_type_t t;
    gfn = paging_gva_to_gfn(current, 0xc0290000, &pfec);
    mfn = get_gfn(d, gfn, &t);

Is that I lost some type translation?


Thanks and best regards!

xinyue

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel