RE: [Xen-ia64-devel] Question in vmx_fault.c

["Xu, Anthony" <anthony.xu@xxxxxxxxx>]

In theory, we should inject data_page_not_present,
While seems data_page_not_present is more expense than dtlb_miss
Data_page_not_present executes rsm psr.dt ( which is not needed for native 
linux) and ptc.l ( which is not needed in virtual environment).

Current implementation can achieve a little better performance.
Seems same thing happens to windows.

- Anthony 

>-----Original Message-----
>From: xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-ia64-devel-
>bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Tristan Gingold
>Sent: 2007年9月30日 23:29
>To: Xen-ia64-devel
>Subject: [Xen-ia64-devel] Question in vmx_fault.c
>
>Hi,
>
>in vmx_hpw_miss (DTLB part):
>        if (!guest_vhpt_lookup(vhpt_adr, &pteval)) {
>            /* VHPT successfully read.  */
>            if (!(pteval & _PAGE_P)) {
>                if (vpsr.ic) {
>                    vcpu_set_isr(v, misr.val);
>                    dtlb_fault(v, vadr); /* XXXXXXXXXXXX */
>                    return IA64_FAULT;
>                } else {
>                    nested_dtlb(v);
>                    return IA64_FAULT;
>                }
>
>Shouldn't we call data_page_not_present instead ?
>
>Tristan.
>
>_______________________________________________
>Xen-ia64-devel mailing list
>Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
>http://lists.xensource.com/xen-ia64-devel

_______________________________________________
Xen-ia64-devel mailing list
Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-ia64-devel