>From 56890fa5728d11c72232348b3f3273e2df31c197 Mon Sep 17 00:00:00 2001 From: David Carlier <devne...@gmail.com> Date: Fri, 26 Jun 2020 10:40:58 +0000 Subject: [PATCH 3/5] Checking mlockall symbol presence
Signed-off-by: David Carlier <devne...@gmail.com> --- configure | 15 +++++++++++++++ os-posix.c | 4 ++++ 2 files changed, 19 insertions(+) diff --git a/configure b/configure index f040b07463..34b0f0f036 100755 --- a/configure +++ b/configure @@ -2379,6 +2379,18 @@ else pty_h=no fi +cat > $TMPC <<EOF +#include <sys/mman.h> +int main(int argc, char *argv[]) { + return mlockall(MCL_FUTURE); +} +EOF +if compile_prog "" "" ; then + have_mlockall=yes +else + have_mlockall=no +fi + ######################################### # vhost interdependencies and host support @@ -7767,6 +7779,9 @@ fi if test "$pty_h" = "yes" ; then echo "CONFIG_PTY=y" >> $config_host_mak fi +if test "$have_mlockall" = "yes" ; then + echo "CONFIG_MLOCKALL=y" >> $config_host_mak +fi if test "$fuzzing" = "yes" ; then if test "$have_fuzzer" = "yes"; then FUZZ_LDFLAGS=" -fsanitize=address,fuzzer" diff --git a/os-posix.c b/os-posix.c index 3cd52e1e70..e02b566940 100644 --- a/os-posix.c +++ b/os-posix.c @@ -337,6 +337,7 @@ bool is_daemonized(void) int os_mlock(void) { +#if defined CONFIG_MLOCKALL int ret = 0; ret = mlockall(MCL_CURRENT | MCL_FUTURE); @@ -345,4 +346,7 @@ int os_mlock(void) } return ret; +#else + return -ENOSYS; +#endif } -- 2.26.0