[PATCH] vhost: Bump max_mem_regions default to 256

[Nikolay Kuratov <kniv@yandex-team.ru>]

Today, vfio mappings for a single GPU (BAR 0) may consume more than 30
umem entries (e.g. configured by qemu with vhost-net), so bump default to
allow running with a few GPUs without module parameter adjustment - it
is harmless, since umem rarely used and iotlb already have larger limit.

Signed-off-by: Nikolay Kuratov <kniv@yandex-team.ru>
---
 drivers/vhost/vhost.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 2f2c45d20883..3ac2ba272716 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -34,10 +34,10 @@
 
 #include "vhost.h"
 
-static ushort max_mem_regions = 64;
+static ushort max_mem_regions = 256;
 module_param(max_mem_regions, ushort, 0444);
 MODULE_PARM_DESC(max_mem_regions,
-	"Maximum number of memory regions in memory map. (default: 64)");
+	"Maximum number of memory regions in memory map. (default: 256)");
 static int max_iotlb_entries = 2048;
 module_param(max_iotlb_entries, int, 0444);
 MODULE_PARM_DESC(max_iotlb_entries,
-- 
2.34.1