LU-15186 o2iblnd: Default map_on_demand to 1

On kernels that provide global MR we default to using that exclusively
even if FMR/FastReg is available. This causes an interop issue if the
active side of a connection request has a higher fragment count than
the passive side  because FMR/FastReg may be needed to map the higher
fragment count. We should change the default map_on_demand to 1 so
that FMR/FastReg is used by default. map_on)demand can still be set
to 0 if needed.

Test-Parameters: trivial
Signed-off-by: Chris Horn <chris.horn@hpe.com>
Change-Id: I76010a905f151efbb0b109ae6f5fba6fb7ce1956
Reviewed-on: https://review.whamcloud.com/45431
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Alexey Lyashkov <alexey.lyashkov@hpe.com>
Reviewed-by: Andriy Skulysh <andriy.skulysh@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>

diff --git a/lnet/klnds/o2iblnd/o2iblnd_modparams.c b/lnet/klnds/o2iblnd/o2iblnd_modparams.c
index fda7a4b..95e7200 100644 (file)
--- a/lnet/klnds/o2iblnd/o2iblnd_modparams.c
+++ b/lnet/klnds/o2iblnd/o2iblnd_modparams.c
@@ -140,13 +140,11 @@ MODULE_PARM_DESC(use_fastreg_gaps, "Enable discontiguous fastreg fragment suppor
  *     the behavior when transmit with GAPS verses contiguous.
  */
 #ifdef HAVE_IB_GET_DMA_MR
-#define IBLND_DEFAULT_MAP_ON_DEMAND 0
 #define MOD_STR "map on demand"
 #else
-#define IBLND_DEFAULT_MAP_ON_DEMAND 1
 #define MOD_STR "map on demand (obsolete)"
 #endif
-static int map_on_demand = IBLND_DEFAULT_MAP_ON_DEMAND;
+static int map_on_demand = 1;
 module_param(map_on_demand, int, 0444);
 MODULE_PARM_DESC(map_on_demand, MOD_STR);