Re: [Xen-devel] Altp2m use with PML can deadlock Xen

2019-05-10 Thread Andrew Cooper
On 10/05/2019 16:29, Tamas K Lengyel wrote: > On Fri, May 10, 2019 at 9:21 AM Andrew Cooper > wrote: >> On 10/05/2019 16:09, Tamas K Lengyel wrote: >>> On Fri, May 10, 2019 at 8:59 AM Andrew Cooper >>> wrote: On 10/05/2019 15:53, Razvan Cojocaru wrote: > On 5/10/19 5:42 PM, Tamas K Len

Re: [Xen-devel] Altp2m use with PML can deadlock Xen

2019-05-10 Thread Tamas K Lengyel
On Fri, May 10, 2019 at 9:21 AM Andrew Cooper wrote: > > On 10/05/2019 16:09, Tamas K Lengyel wrote: > > On Fri, May 10, 2019 at 8:59 AM Andrew Cooper > > wrote: > >> On 10/05/2019 15:53, Razvan Cojocaru wrote: > >>> On 5/10/19 5:42 PM, Tamas K Lengyel wrote: > On Thu, May 9, 2019 at 10:19

Re: [Xen-devel] Altp2m use with PML can deadlock Xen

2019-05-10 Thread Andrew Cooper
On 10/05/2019 16:09, Tamas K Lengyel wrote: > On Fri, May 10, 2019 at 8:59 AM Andrew Cooper > wrote: >> On 10/05/2019 15:53, Razvan Cojocaru wrote: >>> On 5/10/19 5:42 PM, Tamas K Lengyel wrote: On Thu, May 9, 2019 at 10:19 AM Andrew Cooper wrote: > On 09/05/2019 14:38, Tamas K Len

Re: [Xen-devel] Altp2m use with PML can deadlock Xen

2019-05-10 Thread Tamas K Lengyel
On Fri, May 10, 2019 at 8:59 AM Andrew Cooper wrote: > > On 10/05/2019 15:53, Razvan Cojocaru wrote: > > On 5/10/19 5:42 PM, Tamas K Lengyel wrote: > >> On Thu, May 9, 2019 at 10:19 AM Andrew Cooper > >> wrote: > >>> > >>> On 09/05/2019 14:38, Tamas K Lengyel wrote: > Hi all, > I'm inve

Re: [Xen-devel] Altp2m use with PML can deadlock Xen

2019-05-10 Thread Andrew Cooper
On 10/05/2019 15:53, Razvan Cojocaru wrote: > On 5/10/19 5:42 PM, Tamas K Lengyel wrote: >> On Thu, May 9, 2019 at 10:19 AM Andrew Cooper >> wrote: >>> >>> On 09/05/2019 14:38, Tamas K Lengyel wrote: Hi all, I'm investigating an issue with altp2m that can easily be reproduced and le

Re: [Xen-devel] Altp2m use with PML can deadlock Xen

2019-05-10 Thread Razvan Cojocaru
On 5/10/19 5:42 PM, Tamas K Lengyel wrote: On Thu, May 9, 2019 at 10:19 AM Andrew Cooper wrote: On 09/05/2019 14:38, Tamas K Lengyel wrote: Hi all, I'm investigating an issue with altp2m that can easily be reproduced and leads to a hypervisor deadlock when PML is available in hardware. I have

Re: [Xen-devel] Altp2m use with PML can deadlock Xen

2019-05-10 Thread Tamas K Lengyel
On Thu, May 9, 2019 at 10:19 AM Andrew Cooper wrote: > > On 09/05/2019 14:38, Tamas K Lengyel wrote: > > Hi all, > > I'm investigating an issue with altp2m that can easily be reproduced > > and leads to a hypervisor deadlock when PML is available in hardware. > > I haven't been able to trace down

Re: [Xen-devel] Altp2m use with PML can deadlock Xen

2019-05-09 Thread Andrew Cooper
On 09/05/2019 14:38, Tamas K Lengyel wrote: > Hi all, > I'm investigating an issue with altp2m that can easily be reproduced > and leads to a hypervisor deadlock when PML is available in hardware. > I haven't been able to trace down where the actual deadlock occurs. > > The problem seem to stem fro

[Xen-devel] Altp2m use with PML can deadlock Xen

2019-05-09 Thread Tamas K Lengyel
Hi all, I'm investigating an issue with altp2m that can easily be reproduced and leads to a hypervisor deadlock when PML is available in hardware. I haven't been able to trace down where the actual deadlock occurs. The problem seem to stem from hvm/vmx/vmcs.c:vmx_vcpu_flush_pml_buffer that calls p