--- /dev/null
+From 982e47df7b82c5ffe3c414cf5641f08dba0f0e64 Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex.kanavin@gmail.com>
+Date: Fri, 26 Jan 2018 16:32:04 +0200
+Subject: [PATCH] Revert "Set FD_CLOEXEC on opened files before exec from lua
+ script is called"
+
+This reverts commit 7a7c31f551ff167f8718aea6d5048f6288d60205.
+The reason is that when _SC_OPEN_MAX is much higher than the usual 1024
+(for example inside docker), the performance drops sharply.
+
+Upstream has been notified:
+https://bugzilla.redhat.com/show_bug.cgi?id=1537564
+
+Upstream-Status: Inappropriate [upstream needs to come up with a better fix]
+Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
+---
+ luaext/lposix.c | 12 ------------
+ 1 file changed, 12 deletions(-)
+
+diff --git a/luaext/lposix.c b/luaext/lposix.c
+index 0a7c26c71..c578c5a11 100644
+--- a/luaext/lposix.c
++++ b/luaext/lposix.c
+@@ -335,22 +335,10 @@ static int Pexec(lua_State *L) /** exec(path,[args]) */
+ const char *path = luaL_checkstring(L, 1);
+ int i,n=lua_gettop(L);
+ char **argv;
+- int flag, fdno, open_max;
+
+ if (!have_forked)
+ return luaL_error(L, "exec not permitted in this context");
+
+- open_max = sysconf(_SC_OPEN_MAX);
+- if (open_max == -1) {
+- open_max = 1024;
+- }
+- for (fdno = 3; fdno < open_max; fdno++) {
+- flag = fcntl(fdno, F_GETFD);
+- if (flag == -1 || (flag & FD_CLOEXEC))
+- continue;
+- fcntl(fdno, F_SETFD, FD_CLOEXEC);
+- }
+-
+ argv = malloc((n+1)*sizeof(char*));
+ if (argv==NULL) return luaL_error(L,"not enough memory");
+ argv[0] = (char*)path;
+--
+2.15.1
+
