Handle large user-mode page sizes, tested to 64k

Change-Id: Iccabc1be6e3a2822268c7b60e9c4e8250677c2ac
Signed-off-by: Dave Barach <dave@barachs.net>

2 files changed, 6 insertions, 3 deletions

diff --git a/svm/svm.c b/svm/svm.c
index c629f932..4d45b297 100644
--- a/svm/svm.c
+++ b/svm/svm.c
@@ -632,7 +632,10 @@ static void svm_region_init_internal (char *root_path)
     atexit(svm_mutex_cleanup);
 
     /* Randomize the shared-VM base at init time */
-    randomize_baseva = (ticks & 15) * 4096;
+    if (MMAP_PAGESIZE <= (4<<10))
+        randomize_baseva = (ticks & 15) * MMAP_PAGESIZE;
+    else
+        randomize_baseva = (ticks & 3) * MMAP_PAGESIZE;
 
     vec_validate(a,0);
     a->root_path = root_path;
diff --git a/svm/svm.h b/svm/svm.h
index 95c55001..5f112cb8 100644
--- a/svm/svm.h
+++ b/svm/svm.h
@@ -25,7 +25,7 @@
 #include <vppinfra/clib.h>
 #include <vppinfra/mem.h>
 
-#define MMAP_PAGESIZE (4<<10)
+#define MMAP_PAGESIZE (clib_mem_get_page_size())
 
 #define SVM_VERSION ((1<<16) | 1) /* set to declare region ready. */
 
@@ -34,7 +34,7 @@
 #define SVM_FLAGS_NODATA (1<<2)  /* region will be further subdivided */
 #define SVM_FLAGS_NEED_DATA_INIT (1<<3) 
 
-#define SVM_PVT_MHEAP_SIZE (32<<10) /* region's private mheap (32k) */
+#define SVM_PVT_MHEAP_SIZE (128<<10) /* region's private mheap (128k) */
 
 typedef struct svm_region_ {
     volatile uword version;