>>>>> "Bernd" == Bernd Schubert <bernd.schubert@xxxxxxxxxxxxxxxxxx> writes: Bernd> Hmm, direct IO would mean we could not use the page cache. As we Bernd> are using it, that would not really suit us. libaio then might be Bernd> another option then. Bernd> What kind of help do you exactly need? As far as libaio is concerned I had a PoC working a few years ago. I'll be happy to revive it if people are actually interested. So a real world use case would be a great help... But James is right that buffered I/O is much more challenging than direct I/O. And all the use cases we have had have involved databases and business apps that were doing direct I/O anyway. -- Martin K. Petersen Oracle Linux Engineering -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html