diff -ruN mesa-25.0.7/src/util/os_misc.c mesa-25.0.7-banan_os/src/util/os_misc.c
--- mesa-25.0.7/src/util/os_misc.c	2025-05-28 18:20:23.000000000 +0300
+++ mesa-25.0.7-banan_os/src/util/os_misc.c	2025-06-17 14:14:54.254785327 +0300
@@ -69,6 +69,9 @@
 #    include <mach/vm_param.h>
 #    include <mach/vm_statistics.h>
 #   endif
+#elif DETECT_OS_BANAN_OS
+#  include <fcntl.h>
+#  include <sys/banan-os.h>
 #elif DETECT_OS_HAIKU
 #  include <kernel/OS.h>
 #elif DETECT_OS_WINDOWS
@@ -311,6 +314,20 @@
 #endif
 
    return (sysctl(mib, 2, size, &len, NULL, 0) == 0);
+#elif DETECT_OS_BANAN_OS
+    int meminfo_fd = open("/proc/meminfo", O_RDONLY);
+    if (meminfo_fd == -1)
+        return false;
+
+    struct full_meminfo_t meminfo;
+    ssize_t nread = read(meminfo_fd, &meminfo, sizeof(meminfo));
+    close(meminfo_fd);
+
+    if (nread != sizeof(meminfo))
+        return false;
+
+    *size = (meminfo.free_pages + meminfo.used_pages) * meminfo.page_size;
+    return true;
 #elif DETECT_OS_HAIKU
    system_info info;
    status_t ret;