On Thu, 28 Nov 2019 16:59:33 +0000 "Dr. David Alan Gilbert" <dgilb...@redhat.com> wrote:
> * Marc-André Lureau (marcandre.lur...@redhat.com) wrote: > > Hi, > > > > Setting up shared memory for vhost-user is a bit complicated from > > command line, as it requires NUMA setup such as: m 4G -object > > memory-backend-file,id=mem,size=4G,mem-path=/dev/shm,share=on -numa > > node,memdev=mem. > > > > Instead, I suggest to add a -mem-shared option for non-numa setups, > > that will make the -mem-path or anonymouse memory shareable. > > > > Comments welcome, > > It's worth checking with Igor (cc'd) - he said he was going to work on > something similar. > > One other thing this fixes is that it lets you potentially do vhost-user > on s390, since it currently has no NUMA. Switching to memdev will let vhost-user on s390 work as well. This is convenience option and workarounds inability to set main RAM properties in current impl. > Dave > > > Marc-André Lureau (2): > > memfd: add qemu_memfd_open() > > Add -mem-shared option > > > > exec.c | 11 ++++++++++- > > hw/core/numa.c | 16 +++++++++++++++- > > include/qemu/memfd.h | 3 +++ > > include/sysemu/sysemu.h | 1 + > > qemu-options.hx | 10 ++++++++++ > > util/memfd.c | 39 +++++++++++++++++++++++++-------------- > > vl.c | 4 ++++ > > 7 files changed, 68 insertions(+), 16 deletions(-) > > > > -- > > 2.24.0 > > > > > -- > Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK > >
