[PATCH 3/5] vhost: support upto 509 memory regions

Igor Mammedov
2015-06-16T16:34:11Z

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 crashes 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.

Increase 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 99931a0..6a18c92 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -30,7 +30,7 @@
#include "vhost.h"

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

--
1.8.3.1