Strange freeze in QFileSystemBrowser

Hi,

I've developed an application in which I have 2 Tree Views (left and right) and I copy system files from one tree to another. The two tree views have QFileSystemModel as a model.

My problem is that sometimes this copy operation causes a freeze in Qt (about 10 seconds during which the application becomes unresponsive). Here is the stack I get in the thread that freezes:

0: __kernel_vsyscall
1: pthread_cond_wait@glib
2: QWaitCondition::wait()
3: QFileInfoGatherer::run()
4: QThreadPrivate::start()
5: start_thread
6: clone

My issue is on Linux. Does someone have a clue why this freeze happens?

Many thanks,
Alex

It seems the model tries to update itself and while doing so it has to put the thread trying to access the model on hold.