X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/9c92907fc7a130fd6abc60b98791daa320742ba2..a4ab179f11ae2afec1467c4ca9256fc5ba6fa85b:/src/simix/smx_context.cpp

diff --git a/src/simix/smx_context.cpp b/src/simix/smx_context.cpp
index 0238f90c51..2edefd4031 100644
--- a/src/simix/smx_context.cpp
+++ b/src/simix/smx_context.cpp
@@ -184,9 +184,13 @@ void *SIMIX_context_stack_new()
 
 #ifndef _WIN32
     if (mprotect(stack, smx_context_guard_size, PROT_NONE) == -1) {
-      xbt_die("Failed to protect stack: %s", strerror(errno));
-      /* This is fatal. We are going to fail at some point when
-         we tryi reusing this. */
+      xbt_die(
+          "Failed to protect stack: %s.\n"
+          "If you are running a lot of actors, you may be exceeding the amount of mappings allowed per process.\n"
+          "On Linux systems, change this value with sudo sysctl -w vm.max_map_count=newvalue (default value: 65536)\n"
+          "Please see http://simgrid.gforge.inria.fr/simgrid/latest/doc/html/options.html#options_virt for more info.",
+          strerror(errno));
+      /* This is fatal. We are going to fail at some point when we try reusing this. */
     }
 #endif
     stack = (char *)stack + smx_context_guard_size;