On Tue, Nov 19, 2013 at 06:45:08PM +0800, Zheng Liu wrote: > BTW, that would be great if you could give me some comments about this > problem itself. Is it a generic problem in vfs? Or just a feature by > design? It seems like a fundamental issue with ext4 (and most older Linux filesystems) trying to do dio reads without locking out writers. If you have a shared/exclusive lock to protect dio reads against buffered or appending writers like XFS does this issue is properly prevented. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
