Re: [Xen-devel] [PATCH 1/2] xen/gntdev: replace global limit of mapped pages by limit per call

2019-07-18 Thread Juergen Gross
On 18.07.19 19:36, Andrew Cooper wrote: On 18/07/2019 07:52, Juergen Gross wrote: Today there is a global limit of pages mapped via /dev/xen/gntdev set to 1 million pages per default. The Xen default limit even for dom0 is 1024 pages * 16 entries per page, which is far lower than this limit.

Re: [Xen-devel] [PATCH 1/2] xen/gntdev: replace global limit of mapped pages by limit per call

2019-07-18 Thread Andrew Cooper
On 18/07/2019 07:52, Juergen Gross wrote: > Today there is a global limit of pages mapped via /dev/xen/gntdev set > to 1 million pages per default. The Xen default limit even for dom0 is 1024 pages * 16 entries per page, which is far lower than this limit. > There is no reason why that limit is >

[PATCH 1/2] xen/gntdev: replace global limit of mapped pages by limit per call

2019-07-17 Thread Juergen Gross
Today there is a global limit of pages mapped via /dev/xen/gntdev set to 1 million pages per default. There is no reason why that limit is existing, as total number of foreign mappings is limited by the hypervisor anyway and preferring kernel mappings over userspace ones doesn't make sense. Additi