On Mon, Oct 12, 2020 at 02:53:23PM +0200, David Hildenbrand wrote: >Let's add a safe mechanism to unplug memory, avoiding long/endless loops >when trying to offline memory - similar to in SBM. > >Fake-offline all memory (via alloc_contig_range()) before trying to >offline+remove it. Use this mode as default, but allow to enable the other >mode explicitly (which could give better memory hotunplug guarantees in >some environments). > >The "unsafe" mode can be enabled e.g., via virtio_mem.bbm_safe_unplug=0 >on the cmdline. > >Cc: "Michael S. Tsirkin" <m...@redhat.com> >Cc: Jason Wang <jasow...@redhat.com> >Cc: Pankaj Gupta <pankaj.gupta.li...@gmail.com> >Cc: Michal Hocko <mho...@kernel.org> >Cc: Oscar Salvador <osalva...@suse.de> >Cc: Wei Yang <richard.weiy...@linux.alibaba.com> >Cc: Andrew Morton <a...@linux-foundation.org> >Signed-off-by: David Hildenbrand <da...@redhat.com>
Reviewed-by: Wei Yang <richard.weiy...@linux.alibaba.com> -- Wei Yang Help you, Help me
