Re: [Qemu-devel] [PATCH v2 09/16] postcopy: Use temporary for placing zero huge pages

2017-02-24 Thread Laurent Vivier
On 24/02/2017 16:46, Dr. David Alan Gilbert wrote: > * Laurent Vivier (lviv...@redhat.com) wrote: >> On 06/02/2017 18:32, Dr. David Alan Gilbert (git) wrote: >>> From: "Dr. David Alan Gilbert" >>> >>> The kernel can't do UFFDIO_ZEROPAGE for huge pages, so we have >>> to

Re: [Qemu-devel] [PATCH v2 09/16] postcopy: Use temporary for placing zero huge pages

2017-02-24 Thread Dr. David Alan Gilbert
* Laurent Vivier (lviv...@redhat.com) wrote: > On 06/02/2017 18:32, Dr. David Alan Gilbert (git) wrote: > > From: "Dr. David Alan Gilbert" > > > > The kernel can't do UFFDIO_ZEROPAGE for huge pages, so we have > > to allocate a temporary (always zero) page and use

Re: [Qemu-devel] [PATCH v2 09/16] postcopy: Use temporary for placing zero huge pages

2017-02-24 Thread Laurent Vivier
On 06/02/2017 18:32, Dr. David Alan Gilbert (git) wrote: > From: "Dr. David Alan Gilbert" > > The kernel can't do UFFDIO_ZEROPAGE for huge pages, so we have > to allocate a temporary (always zero) page and use UFFDIO_COPYPAGE > on it. > > Signed-off-by: Dr. David Alan

[Qemu-devel] [PATCH v2 09/16] postcopy: Use temporary for placing zero huge pages

2017-02-06 Thread Dr. David Alan Gilbert (git)
From: "Dr. David Alan Gilbert" The kernel can't do UFFDIO_ZEROPAGE for huge pages, so we have to allocate a temporary (always zero) page and use UFFDIO_COPYPAGE on it. Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Juan Quintela