Re: [Xen-devel] [PATCH] xen/grant-table: Force to use v1 of grants.

2014-01-02 Thread Konrad Rzeszutek Wilk
On Thu, Jan 02, 2014 at 02:54:18PM +, David Vrabel wrote: > On 31/12/13 15:15, Konrad Rzeszutek Wilk wrote: > > We have the framework to use v2, but there are no backends that > > actually use it. The end result is that on PV we use v2 grants > > and on PVHVM v1. The v1 has a capacity of 512 gr

Re: [Xen-devel] [PATCH] xen/grant-table: Force to use v1 of grants.

2014-01-02 Thread David Vrabel
On 31/12/13 15:15, Konrad Rzeszutek Wilk wrote: > We have the framework to use v2, but there are no backends that > actually use it. The end result is that on PV we use v2 grants > and on PVHVM v1. The v1 has a capacity of 512 grants per page while > the v2 has 256 grants per page. This means we lo

[PATCH] xen/grant-table: Force to use v1 of grants.

2013-12-31 Thread Konrad Rzeszutek Wilk
We have the framework to use v2, but there are no backends that actually use it. The end result is that on PV we use v2 grants and on PVHVM v1. The v1 has a capacity of 512 grants per page while the v2 has 256 grants per page. This means we lose about 50% capacity - and if we want more than 16 VIFs

Re: [Xen-devel] [PATCH] xen/grant-table: Force to use v1 of grants.

2013-01-18 Thread Konrad Rzeszutek Wilk
On Thu, Jan 17, 2013 at 01:12:36PM +, Ian Campbell wrote: > On Wed, 2013-01-16 at 21:22 +, Konrad Rzeszutek Wilk wrote: > > Note: The hypervisor provides an over-ride for the default > > of 32 frames (pages) per guest: gnttab_max_nr_frames=X > > Should we consider increasing this value? T

Re: [Xen-devel] [PATCH] xen/grant-table: Force to use v1 of grants.

2013-01-17 Thread konrad wilk
On 1/17/2013 8:05 AM, Jan Beulich wrote: On 17.01.13 at 13:22, Matt Wilson wrote: On Wed, Jan 16, 2013 at 04:22:49PM -0500, Konrad Rzeszutek Wilk wrote: We have the framework to use v2, but there are no backends that actually use it. The end result is that on PV we use v2 grants and on PVHVM

Re: [Xen-devel] [PATCH] xen/grant-table: Force to use v1 of grants.

2013-01-17 Thread Ian Campbell
On Wed, 2013-01-16 at 21:22 +, Konrad Rzeszutek Wilk wrote: > Note: The hypervisor provides an over-ride for the default > of 32 frames (pages) per guest: gnttab_max_nr_frames=X Should we consider increasing this value? Ian. -- To unsubscribe from this list: send the line "unsubscribe linux-

Re: [Xen-devel] [PATCH] xen/grant-table: Force to use v1 of grants.

2013-01-17 Thread Jan Beulich
>>> On 17.01.13 at 13:22, Matt Wilson wrote: > On Wed, Jan 16, 2013 at 04:22:49PM -0500, Konrad Rzeszutek Wilk wrote: >> We have the framework to use v2, but there are no backends that >> actually use it. The end result is that on PV we use v2 grants >> and on PVHVM v1. The v1 has a capacity of 51

Re: [PATCH] xen/grant-table: Force to use v1 of grants.

2013-01-17 Thread Matt Wilson
On Wed, Jan 16, 2013 at 04:22:49PM -0500, Konrad Rzeszutek Wilk wrote: > We have the framework to use v2, but there are no backends that > actually use it. The end result is that on PV we use v2 grants > and on PVHVM v1. The v1 has a capacity of 512 grants per page while > the v2 has 256 grants per

[PATCH] xen/grant-table: Force to use v1 of grants.

2013-01-16 Thread Konrad Rzeszutek Wilk
We have the framework to use v2, but there are no backends that actually use it. The end result is that on PV we use v2 grants and on PVHVM v1. The v1 has a capacity of 512 grants per page while the v2 has 256 grants per page. This means we lose about 50% capacity - and if we want more than 16 VIFs