On Mon, Nov 13, 2017 at 02:01:36PM -0800, Linus Torvalds wrote: > > And in the end, maybe even the warning is pointless. You used > direct-IO and cached IO at the same time, and you got coherency > issues. What did you expect? directio is fundamentally broken. A single warning per inode, "page cache coherency broken due to direct I/O; userspace did a dumb thing; oh, well" is probably more than sufficient. The reason to have the warning is so that when the user complains about the file system bug, we can point at the "userspace did a dumb thing" warning message. - Ted
