feat: add OOM score adjustment tool for critical DDE services

REUSE.toml

@@ -22,7 +22,7 @@ SPDX-FileCopyrightText = "UnionTech Software Technology Co., Ltd."
 SPDX-License-Identifier = "LGPL-3.0-or-later"
 
 [[annotations]]
-path = ["dbus/**.service", "systemd/**", "tools/**.service"]
+path = ["dbus/**.service", "systemd/**", "tools/**.service", "tools/**.desktop"]
 precedence = "aggregate"
 SPDX-FileCopyrightText = "UnionTech Software Technology Co., Ltd."
 SPDX-License-Identifier = "LGPL-3.0-or-later"

debian/control

@@ -5,6 +5,7 @@ Maintainer: Deepin Packages Builder <packages@deepin.com>
 Build-Depends:
  cmake,
  debhelper-compat (= 11),
+ libcap-ng-dev,
  libdtk6core-dev,
  libdtk6core-bin,
  libglib2.0-dev,

debian/postinst

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+case "$1" in
+    configure)        
+        # Set CAP_SYS_RESOURCE capability on dde-oom-score-adj
+        # This allows it to adjust oom_score_adj for monitored services
+        if [ -x /usr/bin/dde-oom-score-adj ]; then
+            setcap cap_sys_resource=ep /usr/bin/dde-oom-score-adj || true
+        fi
+    ;;
+esac
+
+#DEBHELPER#

misc/CMakeLists.txt

@@ -21,3 +21,6 @@ install(
 
 install(FILES ${XSESSION} DESTINATION /etc/X11/Xsession.d/)
 install(FILES ${PROFILE} DESTINATION /etc/profile.d)
+
+file(GLOB DCONFIG_FILES "misc/dconf/*.json")
+dtk_add_config_meta_files(APPID org.deepin.dde.session BASE misc/dconf FILES ${DCONFIG_FILES})

misc/dconf/org.deepin.dde.session.oom-score-adj.json

@@ -0,0 +1,16 @@
+{
+  "magic": "dsg.config.meta",
+  "version": "1.0",
+  "contents": {
+    "monitorServices": {
+      "value": ["dde-session-manager.service","dde-session@x11.service"],
+      "serial": 0,
+      "flags": ["global"],
+      "name": "monitorServices",
+      "name[zh_CN]": "OOM 分数调整监控服务列表",
+      "description": "List of systemd services to monitor for OOM score adjustment",
+      "permissions": "readonly",
+      "visibility": "private"
+    }
+  }
+}

src/CMakeLists.txt

@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2024 UnionTech Software Technology Co., Ltd.
+# SPDX-FileCopyrightText: 2025 UnionTech Software Technology Co., Ltd.
 #
 # SPDX-License-Identifier: CC0-1.0
 

tools/CMakeLists.txt

@@ -2,3 +2,4 @@ add_subdirectory("dde-keyring-checker")
 add_subdirectory("dde-version-checker")
 add_subdirectory("dde-xsettings-checker")
 add_subdirectory("dde-quick-login")
+add_subdirectory("dde-oom-score-adj")

tools/dde-oom-score-adj/CMakeLists.txt

@@ -0,0 +1,30 @@
+# SPDX-FileCopyrightText: 2025 UnionTech Software Technology Co., Ltd.
+#
+# SPDX-License-Identifier: CC0-1.0
+
+set(BIN_NAME dde-oom-score-adj)
+
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+
+find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Core DBus REQUIRED)
+find_package(Dtk${DTK_VERSION_MAJOR} REQUIRED COMPONENTS Core)
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(CAPNG REQUIRED IMPORTED_TARGET libcap-ng)
+
+add_executable(${BIN_NAME}
+    main.cpp
+    oomscoreadjuster.h
+    oomscoreadjuster.cpp
+)
+
+target_link_libraries(${BIN_NAME}
+    Qt${QT_VERSION_MAJOR}::Core
+    Qt${QT_VERSION_MAJOR}::DBus
+    Dtk${DTK_VERSION_MAJOR}::Core
+    PkgConfig::CAPNG
+)
+
+install(TARGETS ${BIN_NAME} DESTINATION bin)
+install(FILES dde-oom-score-adj.desktop DESTINATION /etc/xdg/autostart/)

tools/dde-oom-score-adj/dde-oom-score-adj.desktop

@@ -0,0 +1,7 @@
+[Desktop Entry]
+Type=Application
+Name=DDE OOM Score Adjuster
+Comment=Adjust OOM score for critical DDE services
+Exec=/usr/bin/dde-oom-score-adj
+Terminal=false
+NoDisplay=true

tools/dde-oom-score-adj/main.cpp

@@ -0,0 +1,32 @@
+// SPDX-FileCopyrightText: 2025 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "oomscoreadjuster.h"
+#include <QCoreApplication>
+#include <QDebug>
+#include <cap-ng.h>
+#include <unistd.h>
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication app(argc, argv);
+
+    // 初始化 libcap-ng
+    capng_get_caps_process();
+
+    // 检查是否有 CAP_SYS_RESOURCE capability（仅用于调试信息）
+    if (!capng_have_capability(CAPNG_EFFECTIVE, CAP_SYS_RESOURCE)) {
+        qWarning() << "Warning: Missing CAP_SYS_RESOURCE capability!";
+        qWarning() << "The program may not be able to modify oom_score_adj.";
+        qWarning() << "When running as systemd service, capabilities are granted automatically.";
+    }
+
+    OomScoreAdjuster adjuster;
+
+    // 连接退出信号
+    QObject::connect(&adjuster, &OomScoreAdjuster::handleExit, &app, &QCoreApplication::quit);
+    QMetaObject::invokeMethod(&adjuster, "start", Qt::QueuedConnection);
+
+    return app.exec();
+}