diff --git a/stand/kboot/main.c b/stand/kboot/main.c
--- a/stand/kboot/main.c
+++ b/stand/kboot/main.c
@@ -50,6 +50,45 @@
 
 extern int command_fdt_internal(int argc, char *argv[]);
 
+static uint64_t commit_limit;
+static uint64_t committed_as;
+static uint64_t mem_avail;
+
+static void
+memory_limits(void)
+{
+	int fd;
+	char buf[128];
+
+	/*
+	 * To properly size the slabs, we need to find how much memory we can
+	 * commit to using. commit_limit is the max, while commited_as is the
+	 * current total. We can use these later to allocate the largetst amount
+	 * of memory possible so we can support larger ram disks than we could
+	 * by using fixed segment sizes. We also grab the memory available so
+	 * we don't use more than 49% of that.
+	 */
+	fd = open("host:/proc/meminfo", O_RDONLY);
+	if (fd != -1) {
+		while (fgetstr(buf, sizeof(buf), fd) > 0) {
+			if (strncmp(buf, "MemAvailable:", 13) == 0) {
+				mem_avail = strtoll(buf + 13, NULL, 0);
+				mem_avail <<= 10; /* Units are kB */
+			} else if (strncmp(buf, "CommitLimit:", 12) == 0) {
+				commit_limit = strtoll(buf + 13, NULL, 0);
+				commit_limit <<= 10; /* Units are kB */
+			} else if (strncmp(buf, "Committed_AS:", 13) == 0) {
+				committed_as = strtoll(buf + 14, NULL, 0);
+				committed_as <<= 10; /* Units are kB */
+			}
+		}
+	}
+	printf("Commit limit: %lld Committed bytes %lld Available %lld\n",
+	    (long long)commit_limit, (long long)committed_as,
+	    (long long)mem_avail);
+	close(fd);
+}
+
 /*
  * NB: getdev should likely be identical to this most places, except maybe
  * we should move to storing the length of the platform devdesc.
@@ -217,6 +256,8 @@
 	setenv("LINES", "24", 1);
 	setenv("usefdt", "1", 1);
 
+	memory_limits();
+
 	/*
 	 * Find acpi, if it exists
 	 */