Re: [Xen-devel] [PATCH v3 1/2] x86/mem-sharing: Bulk mem-sharing entire domains

>>> On 13.05.16 at 18:29, wrote: > On Fri, May 13, 2016 at 10:12 AM, Jan Beulich wrote: > On 13.05.16 at 17:31, wrote: >>> On Fri, May 13, 2016 at 9:09 AM, Jan Beulich wrote: >>> On 13.05.16 at 16:50,

Re: [Xen-devel] [PATCH v3 1/2] x86/mem-sharing: Bulk mem-sharing entire domains

On Fri, May 13, 2016 at 10:12 AM, Jan Beulich wrote: On 13.05.16 at 17:31, wrote: >> On Fri, May 13, 2016 at 9:09 AM, Jan Beulich wrote: >> On 13.05.16 at 16:50, wrote: On Fri, May 13, 2016 at 6:00

Re: [Xen-devel] [PATCH v3 1/2] x86/mem-sharing: Bulk mem-sharing entire domains

>>> On 13.05.16 at 17:35, wrote: > On 05/13/2016 11:09 AM, Jan Beulich wrote: > On 13.05.16 at 16:50, wrote: > [...] > @@ -1468,6 +1505,69 @@ int > mem_sharing_memop(XEN_GUEST_HANDLE_PARAM(xen_mem_sharing_op_t) arg) > } >

Re: [Xen-devel] [PATCH v3 1/2] x86/mem-sharing: Bulk mem-sharing entire domains

>>> On 13.05.16 at 17:31, wrote: > On Fri, May 13, 2016 at 9:09 AM, Jan Beulich wrote: > On 13.05.16 at 16:50, wrote: >>> On Fri, May 13, 2016 at 6:00 AM, Jan Beulich wrote: >>> On 12.05.16 at 17:25,

Re: [Xen-devel] [PATCH v3 1/2] x86/mem-sharing: Bulk mem-sharing entire domains

On 05/13/2016 11:09 AM, Jan Beulich wrote: On 13.05.16 at 16:50, wrote: [...] @@ -1468,6 +1505,69 @@ int mem_sharing_memop(XEN_GUEST_HANDLE_PARAM(xen_mem_sharing_op_t) arg) } break; +case XENMEM_sharing_op_bulk_share: +{ +

Re: [Xen-devel] [PATCH v3 1/2] x86/mem-sharing: Bulk mem-sharing entire domains

On Fri, May 13, 2016 at 9:09 AM, Jan Beulich wrote: On 13.05.16 at 16:50, wrote: >> On Fri, May 13, 2016 at 6:00 AM, Jan Beulich wrote: >> On 12.05.16 at 17:25, wrote: +if ( !rc ) +

Re: [Xen-devel] [PATCH v3 1/2] x86/mem-sharing: Bulk mem-sharing entire domains

>>> On 13.05.16 at 16:50, wrote: > On Fri, May 13, 2016 at 6:00 AM, Jan Beulich wrote: > On 12.05.16 at 17:25, wrote: >>> +if ( !rc ) >>> +mem_sharing_share_pages(d, bulk->start, sh, cd, >>>

Re: [Xen-devel] [PATCH v3 1/2] x86/mem-sharing: Bulk mem-sharing entire domains

On Fri, May 13, 2016 at 6:00 AM, Jan Beulich wrote: On 12.05.16 at 17:25, wrote: >> --- a/xen/arch/x86/mm/mem_sharing.c >> +++ b/xen/arch/x86/mm/mem_sharing.c >> @@ -1294,6 +1294,43 @@ int relinquish_shared_pages(struct domain *d) >> return rc;

Re: [Xen-devel] [PATCH v3 1/2] x86/mem-sharing: Bulk mem-sharing entire domains

>>> On 12.05.16 at 17:25, wrote: > --- a/xen/arch/x86/mm/mem_sharing.c > +++ b/xen/arch/x86/mm/mem_sharing.c > @@ -1294,6 +1294,43 @@ int relinquish_shared_pages(struct domain *d) > return rc; > } > > +static int bulk_share(struct domain *d, struct domain *cd,

[Xen-devel] [PATCH v3 1/2] x86/mem-sharing: Bulk mem-sharing entire domains

Currently mem-sharing can be performed on a page-by-page base from the control domain. However, when completely deduplicating (cloning) a VM, this requires at least 3 hypercalls per page. As the user has to loop through all pages up to max_gpfn, this process is very slow and wasteful. This patch

Re: [Xen-devel] [PATCH v3 1/2] x86/mem-sharing: Bulk mem-sharing entire domains

>>> On 16.10.15 at 19:02, wrote: > On Fri, Oct 16, 2015 at 12:46 AM, Jan Beulich wrote: >> >>> On 15.10.15 at 20:09, wrote: >> > +rc = -EFAULT; >> > +else >> > +rc = >> >

Re: [Xen-devel] [PATCH v3 1/2] x86/mem-sharing: Bulk mem-sharing entire domains

On Fri, Oct 16, 2015 at 12:46 AM, Jan Beulich wrote: > >>> On 15.10.15 at 20:09, wrote: > > --- a/xen/arch/x86/mm/mem_sharing.c > > +++ b/xen/arch/x86/mm/mem_sharing.c > > @@ -1293,6 +1293,42 @@ int relinquish_shared_pages(struct domain *d) > >

[Xen-devel] [PATCH v3 1/2] x86/mem-sharing: Bulk mem-sharing entire domains

Currently mem-sharing can be performed on a page-by-page base from the control domain. However, when completely deduplicating (cloning) a VM, this requires at least 3 hypercalls per page. As the user has to loop through all pages up to max_gpfn, this process is very slow and wasteful. This patch