The sync()-in-kernel work-around only seems to help on an otherwise idle system. I've opened an upstream and Fedora bug now, since I've been able trivially reproduce it both on current Fedora and the latest stable upstream kernel.
The sync()-in-kernel work-around only seems to help on an otherwise idle system. I've opened an upstream and Fedora bug now, since I've been able trivially reproduce it both on current Fedora and the latest stable upstream kernel.