Re: [Qemu-devel] [PATCH] spapr: Correct RAM size calculation for HPT resizing

2017-10-10 Thread David Gibson
On Tue, Oct 10, 2017 at 05:21:53PM +0200, Laurent Vivier wrote: > On 10/10/2017 16:44, Greg Kurz wrote: > > On Wed, 11 Oct 2017 00:21:59 +1100 > > David Gibson wrote: > > > >> In order to prevent the guest from forcing the allocation of large amounts > >> of qemu memory (or host kernel memory, in

Re: [Qemu-devel] [PATCH] spapr: Correct RAM size calculation for HPT resizing

2017-10-10 Thread Laurent Vivier
On 10/10/2017 16:44, Greg Kurz wrote: > On Wed, 11 Oct 2017 00:21:59 +1100 > David Gibson wrote: > >> In order to prevent the guest from forcing the allocation of large amounts >> of qemu memory (or host kernel memory, in the case of KVM HV), we limit >> the size of Hashed Page Table (HPT) it is

Re: [Qemu-devel] [PATCH] spapr: Correct RAM size calculation for HPT resizing

2017-10-10 Thread Greg Kurz
On Wed, 11 Oct 2017 00:21:59 +1100 David Gibson wrote: > In order to prevent the guest from forcing the allocation of large amounts > of qemu memory (or host kernel memory, in the case of KVM HV), we limit > the size of Hashed Page Table (HPT) it is allowed to allocated, based on > its RAM size.

Re: [Qemu-devel] [PATCH] spapr: Correct RAM size calculation for HPT resizing

2017-10-10 Thread Laurent Vivier
On 10/10/2017 15:21, David Gibson wrote: > In order to prevent the guest from forcing the allocation of large amounts > of qemu memory (or host kernel memory, in the case of KVM HV), we limit > the size of Hashed Page Table (HPT) it is allowed to allocated, based on > its RAM size. > > However, th