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    Subject[PATCH] vhost: support upto 509 memory regions
    Date
    since commit
    1d4e7e3 kvm: x86: increase user memory slots to 509

    it became possible to use a bigger amount of memory
    slots, which is used by memory hotplug for
    registering hotplugged memory.
    However QEMU aborts if it's used with more than ~60
    pc-dimm devices and vhost-net since host kernel
    in module vhost-net refuses to accept more than 65
    memory regions.

    Increasing VHOST_MEMORY_MAX_NREGIONS from 65 to 509
    to match KVM_USER_MEM_SLOTS fixes issue for vhost-net.

    Signed-off-by: Igor Mammedov <imammedo@redhat.com>
    ---
    drivers/vhost/vhost.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
    index 2ee2826..ecbd7a4 100644
    --- a/drivers/vhost/vhost.c
    +++ b/drivers/vhost/vhost.c
    @@ -29,7 +29,7 @@
    #include "vhost.h"

    enum {
    - VHOST_MEMORY_MAX_NREGIONS = 64,
    + VHOST_MEMORY_MAX_NREGIONS = 509,
    VHOST_MEMORY_F_LOG = 0x1,
    };

    --
    1.8.3.1


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