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$NetBSD: patch-af,v 1.3 2016/12/18 22:58:34 adam Exp $
--- src/libout123/xfermem.c.orig 2016-09-26 21:20:25.000000000 +0000
+++ src/libout123/xfermem.c
@@ -36,6 +36,13 @@ void xfermem_init (txfermem **xf, size_t
#ifdef HAVE_MMAP
# ifdef MAP_ANON
+
+#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104030000)
+ if(madvise((void *)xf, (regsize - sizeof(txfermem)),
+ MADV_SEQUENTIAL) < 0)
+ fprintf(stderr,"madvise failed, continuing anyway...\n");
+#endif
+
if ((*xf = (txfermem *) mmap(0, regsize, PROT_READ | PROT_WRITE,
MAP_ANON | MAP_SHARED, -1, 0)) == (txfermem *) -1) {
perror ("mmap()");
@@ -93,6 +100,10 @@ void xfermem_done (txfermem *xf)
Casting to (void*) should silence compilers in case of funny
prototype for munmap(). */
munmap ( (void*)xf, xf->size + xf->metasize + sizeof(txfermem));
+#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104030000)
+ if(madvise((void *)xf, (xf->size + xf->metasize), MADV_FREE) < 0)
+ fprintf(stderr,"madvise failed, continuing anyways..\n");
+#endif
#else
if (shmdt((void *) xf) == -1) {
perror ("shmdt()");
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