Index: elf/dl-load.c =================================================================== --- elf/dl-load.c.orig +++ elf/dl-load.c @@ -1219,6 +1219,9 @@ cannot allocate TLS data structures for goto call_lose_errno; } + if (GLRO(dl_madvise)) + posix_fadvise (fd, c->mapoff, maplength, POSIX_FADV_WILLNEED); + l->l_map_end = l->l_map_start + maplength; l->l_addr = l->l_map_start - c->mapstart; Index: elf/dl-support.c =================================================================== --- elf/dl-support.c.orig +++ elf/dl-support.c @@ -41,6 +41,7 @@ size_t _dl_platformlen; int _dl_debug_mask; int _dl_lazy; +int _dl_madvise; ElfW(Addr) _dl_use_load_bias = -2; int _dl_dynamic_weak; @@ -240,6 +241,8 @@ _dl_non_dynamic_init (void) _dl_lazy = *(getenv ("LD_BIND_NOW") ?: "") == '\0'; + _dl_madvise = *(getenv ("LD_NOMADVISE") ?: "") == '\0'; + _dl_bind_not = *(getenv ("LD_BIND_NOT") ?: "") != '\0'; _dl_dynamic_weak = *(getenv ("LD_DYNAMIC_WEAK") ?: "") == '\0'; Index: elf/rtld.c =================================================================== --- elf/rtld.c.orig +++ elf/rtld.c @@ -152,6 +152,7 @@ struct rtld_global_ro _rtld_global_ro at ._dl_lazy = 1, ._dl_fpu_control = _FPU_DEFAULT, ._dl_pointer_guard = 1, + ._dl_madvise = 1, /* Function pointers. */ ._dl_debug_printf = _dl_debug_printf, @@ -2619,6 +2620,14 @@ process_envvars (enum mode *modep) break; case 9: + /* Test whether we should not advise the kernel + about memory usage. */ + if (memcmp (envline, "NOMADVISE", 9) == 0) + { + GLRO(dl_madvise) = envline[10] == '\0'; + break; + } + /* Test whether we want to see the content of the auxiliary array passed up from the kernel. */ if (!INTUSE(__libc_enable_secure) Index: sysdeps/generic/ldsodefs.h =================================================================== --- sysdeps/generic/ldsodefs.h.orig +++ sysdeps/generic/ldsodefs.h @@ -567,6 +567,9 @@ struct rtld_global_ro /* Do we do lazy relocations? */ EXTERN int _dl_lazy; + /* Should we advise kernel about memory usage? */ + EXTERN int _dl_madvise; + /* Nonzero if runtime lookups should not update the .got/.plt. */ EXTERN int _dl_bind_not;