fedora 42 在 konsole 打字时 konsole 进程的 cpu 占用是正常的，在按着按键不松的情况下连续输入同一个字符 konsole 进程的 cpu 占用只有百分之十几，升级到 fedora 44 后就变成将近百分之百了，我用 perf record 分析了一下 cpu 占用高的原因，结果如下：
Samples: 12K of event 'cpu_core/cycles/P', Event count (approx.): 10384837753
Children Self Command Shared Object Symbol
+ 91.73% 0.00% konsole konsole [.] _start
+ 91.73% 0.00% konsole libc.so.6 [.] __libc_start_main@@GLIBC_2.34
+ 91.73% 0.00% konsole libc.so.6 [.] __libc_start_call_main
+ 91.73% 0.00% konsole konsole [.] main
+ 91.73% 0.00% konsole libQt6Core.so.6.10.3 [.] QCoreApplication::exec()
+ 91.71% 0.02% konsole libQt6Core.so.6.10.3 [.] QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
+ 91.70% 0.00% konsole libQt6Core.so.6.10.3 [.] QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
+ 91.39% 0.00% konsole libglib-2.0.so.0.8800.0 [.] g_main_context_iteration
+ 91.38% 0.01% konsole libglib-2.0.so.0.8800.0 [.] g_main_context_iterate_unlocked.isra.0
+ 91.25% 0.01% konsole libglib-2.0.so.0.8800.0 [.] g_main_context_dispatch_unlocked.lto_priv.0
+ 91.05% 0.02% konsole libQt6Core.so.6.10.3 [.] QCoreApplication::notifyInternal2(QObject*, QEvent*)
+ 90.96% 0.01% konsole libQt6Widgets.so.6.10.3 [.] QApplicationPrivate::notify_helper(QObject*, QEvent*)
+ 89.40% 0.02% konsole libQt6Widgets.so.6.10.3 [.] QWidget::event(QEvent*)
+ 89.35% 0.00% konsole libQt6Core.so.6.10.3 [.] postEventSourceDispatch(_GSource*, int (*)(void*), void*)
+ 89.35% 0.02% konsole libQt6Core.so.6.10.3 [.] QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*)
+ 89.09% 0.00% konsole libKF6XmlGui.so.6.25.0 [.] KXmlGuiWindow::event(QEvent*)
+ 88.94% 0.01% konsole libQt6Widgets.so.6.10.3 [.] QWidgetRepaintManager::paintAndFlush()
+ 64.37% 63.13% konsole libQt6Gui.so.6.10.3 [.] qt_memfillXX_avx2(unsigned char*, long long __vector(4), long long)
+ 64.37% 0.00% konsole libQt6Gui.so.6.10.3 [.] QPainter::fillRect(QRect const&, QColor const&)
+ 64.37% 0.00% konsole libQt6Gui.so.6.10.3 [.] QRasterPaintEngine::fillRect(QRectF const&, QSpanData*)
+ 55.10% 0.00% konsole libQt6Widgets.so.6.10.3 [.] QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, QFlags<QWidgetPrivate::DrawWidgetFlag>,
+ 54.99% 0.02% konsole libQt6Widgets.so.6.10.3 [.] QWidgetPrivate::sendPaintEvent(QRegion const&)
+ 48.05% 0.03% konsole libkonsoleprivate.so.26.04.0 [.] Konsole::TerminalDisplay::paintEvent(QPaintEvent*)
+ 32.81% 0.03% konsole libQt6Gui.so.6.10.3 [.] QBackingStore::beginPaint(QRegion const&)
+ 32.78% 0.00% konsole libQt6WaylandClient.so.6.10.3 [.] QtWaylandClient::QWaylandShmBackingStore::beginPaint(QRegion const&)
+ 16.03% 0.57% konsole libkonsoleprivate.so.26.04.0 [.] Konsole::TerminalPainter::drawContents(Konsole::Character*, QPainter&, QRect const&, bool, int, bool, QList<Konso
+ 11.89% 0.07% konsole libkonsoleprivate.so.26.04.0 [.] Konsole::TerminalPainter::drawTextCharacters(QPainter&, QRect const&, QString const&, Konsole::Character, QColor
+ 11.30% 0.12% konsole libQt6Gui.so.6.10.3 [.] QPainter::drawText(QPointF const&, QString const&, int, int)
+ 7.77% 0.00% Thread (pooled) libc.so.6 [.] __GI___clone3
+ 7.77% 0.00% Thread (pooled) libc.so.6 [.] start_thread
+ 7.77% 0.00% Thread (pooled) libQt6Core.so.6.10.3 [.] QThreadPrivate::start(void*)
+ 7.70% 0.24% Thread (pooled) libQt6Core.so.6.10.3 [.] QThreadPoolThread::run()
+ 6.72% 0.02% konsole libQt6Widgets.so.6.10.3 [.] QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&,
+ 6.48% 0.02% konsole libkonsoleprivate.so.26.04.0 [.] Konsole::TerminalScrollBar::paintEvent(QPaintEvent*)
+ 6.38% 0.01% konsole libQt6Widgets.so.6.10.3 [.] QScrollBar::paintEvent(QPaintEvent*)
+ 6.13% 0.01% konsole breeze6.so [.] Breeze::Style::drawComplexControl(QStyle::ComplexControl, QStyleOptionComplex const*, QPainter*, QWidget const*)
+ 6.10% 0.04% konsole breeze6.so [.] Breeze::Style::drawScrollBarComplexControl(QStyleOptionComplex const*, QPainter*, QWidget const*) const
+ 5.43% 0.03% konsole libQt6Widgets.so.6.10.3 [.] QCommonStyle::drawComplexControl(QStyle::ComplexControl, QStyleOptionComplex const*, QPainter*, QWidget const*) c
+ 5.40% 0.10% konsole libQt6Gui.so.6.10.3 [.] QPainterPrivate::drawTextItem(QPointF const&, QTextItem const&, QTextEngine*)
+ 5.31% 0.00% konsole breeze6.so [.] Breeze::Style::drawControl(QStyle::ControlElement, QStyleOption const*, QPainter*, QWidget const*) const
+ 5.28% 0.00% konsole breeze6.so [.] Breeze::Style::drawScrollBarSliderControl(QStyleOption const*, QPainter*, QWidget const*) const
+ 5.23% 0.02% konsole breeze6.so [.] Breeze::Style::drawScrollBarSliderControl(QStyleOption const*, QPainter*, QWidget const*) const [clone .part.0]
+ 5.12% 0.10% konsole libQt6Gui.so.6.10.3 [.] QRasterPaintEngine::drawTextItem(QPointF const&, QTextItem const&)
+ 4.93% 0.00% konsole libQt6Gui.so.6.10.3 [.] QPaintEngineEx::drawRoundedRect(QRectF const&, double, double, Qt::SizeMode)
+ 4.91% 0.18% Thread (pooled) libQt6Gui.so.6.10.3 [.] QRunnable::QGenericRunnable::Helper<blend_color_argb(int, QT_FT_Span_ const*, void*)::{lambda()#1}>::impl(QRunnab
发现 qt_memfillXX_avx2 这个函数的 cpu 占用有 63.13%，而在 fedora 42 上用 perf record 分析 cpu 占用压根就没采集到这个函数，感觉应该是 fedora 44 的 bug ，我想给 fedora 反馈这个 bug 但不知道要怎么搞，有 v 友能帮我给 fedora 反馈一下吗？