Change PYTHONJITDISABLEHUGEPAGES to PYTHONJITHUGEPAGES

Summary:
Now you'll be able to do =0 or =1 to control whether it should be enabled or
disabled, rather than just disabling it.

Nothing actually uses this today, but I've updated the references to it in IG
Django.

Reviewed By: czardoz

Differential Revision: D79741469

fbshipit-source-id: 9e1f10c20f5e121cede841960bbd3426ed5c3862

Author: alexmalyshev

cinderx/Jit/pyjit.cpp

@@ -529,10 +529,10 @@ FlagProcessor initFlagProcessor() {
       "Dump JIT runtime stats at shutdown");
 
   flag_processor.addOption(
-      "jit-disable-huge-pages",
-      "PYTHONJITDISABLEHUGEPAGES",
-      [](const std::string&) { getMutableConfig().use_huge_pages = false; },
-      "disable huge page support");
+      "jit-huge-pages",
+      "PYTHONJITHUGEPAGES",
+      getMutableConfig().use_huge_pages,
+      "Enable or disable huge pages for compiled functions");
 
   flag_processor.addOption(
       "jit-enable-jit-list-wildcards",

cinderx/PythonLib/test_cinderx/test_cinderjit.py

@@ -1657,7 +1657,7 @@ def onek_asserts(actual_stdout):
             run_test(zero_asserts, ["-X", "jit-max-code-size=0"])
             run_test(
                 zero_asserts,
-                ["-X", "jit-max-code-size=0", "-X", "jit-disable-huge-pages"],
+                ["-X", "jit-max-code-size=0", "-X", "jit-huge-pages=0"],
             )
             run_test(
                 zero_asserts,
@@ -1675,7 +1675,7 @@ def onek_asserts(actual_stdout):
             run_test(onek_asserts, ["-X", "jit-max-code-size=1024"])
             run_test(
                 onek_asserts,
-                ["-X", "jit-max-code-size=1024", "-X", "jit-disable-huge-pages"],
+                ["-X", "jit-max-code-size=1024", "-X", "jit-huge-pages=0"],
             )
             run_test(
                 onek_asserts,

cinderx/RuntimeTests/cmdline_test.cpp

@@ -247,12 +247,20 @@ TEST_F(CmdLineTest, BasicFlags) {
 
   ASSERT_EQ(
       try_flag_and_envvar_effect(
-          L"jit-disable-huge-pages",
-          "PYTHONJITDISABLEHUGEPAGES",
+          L"jit-huge-pages=0",
+          "PYTHONJITHUGEPAGES=0",
           []() {},
           []() { ASSERT_FALSE(getConfig().use_huge_pages); }),
       0);
 
+  ASSERT_EQ(
+      try_flag_and_envvar_effect(
+          L"jit-huge-pages=1",
+          "PYTHONJITHUGEPAGES=1",
+          []() {},
+          []() { ASSERT_TRUE(getConfig().use_huge_pages); }),
+      0);
+
   ASSERT_EQ(
       try_flag_and_envvar_effect(
           L"jit-enable-jit-list-wildcards",