Re: [Xen-devel] [PATCH RFC] p2m: use GNTTABOP_unmap_and_duplicate if available

2013-08-01 Thread Roger Pau Monné
On 01/08/13 11:53, David Vrabel wrote: > On 31/07/13 17:07, Roger Pau Monne wrote: >> The new GNTTABOP_unmap_and_duplicate operation doesn't zero the >> mapping passed in new_addr, allowing us to perform batch unmaps in p2m >> code without requiring the use of a multicall. > > Thanks. This looks l

Re: [Xen-devel] [PATCH RFC] p2m: use GNTTABOP_unmap_and_duplicate if available

2013-08-01 Thread David Vrabel
On 31/07/13 17:07, Roger Pau Monne wrote: > The new GNTTABOP_unmap_and_duplicate operation doesn't zero the > mapping passed in new_addr, allowing us to perform batch unmaps in p2m > code without requiring the use of a multicall. Thanks. This looks like it should be a good performance improvement

[PATCH RFC] p2m: use GNTTABOP_unmap_and_duplicate if available

2013-07-31 Thread Roger Pau Monne
The new GNTTABOP_unmap_and_duplicate operation doesn't zero the mapping passed in new_addr, allowing us to perform batch unmaps in p2m code without requiring the use of a multicall. Signed-off-by: Roger Pau Monné Cc: Stefano Stabellini Cc: Konrad Rzeszutek Wilk --- I don't currently have a NFS