On Thu, 25 Jul 2013 23:15:49 -0400, Kumar amit mehta said: > applications are being written. So one bad day somebody comes up with > an application which does both these two types of IO(one that goes > through page cache and the other that doesn't) and in that application, > one instance is writing directly to the backend device and the other > instance, who is not aware of this write, goes ahead and writes to the > page cache, and that write would be written later to the backend device. > So wouldn't we end up corrupting the on disk data.
Applications that intermix O_DIRECT and non-O_DIRECT to the same file get what they deserve. Consider it evolution in action, you're not going to get any sympathy from the kernel community for this.
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