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" <mst@xxxxxxxxxx> >Cc: Jason Wang <jasowang@xxxxxxxxxx> >Cc: Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx> >Cc: Michal Hocko <mhocko@xxxxxxxxxx> >Cc: Oscar Salvador <osalvador@xxxxxxx> >Cc: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx> >Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> >Signed-off-by: David Hildenbrand <david@xxxxxxxxxx> Reviewed-by: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx> -- Wei Yang Help you, Help me
