Dave Kleikamp: > No. I was saying the opposite. Nothing that happens to the upper > address space would be visible to the lower address space. The upper > file could read from the lower file system on-demand as pages are > faulted. There is no need to copy everything at once. So you mean, - you have two mmap for a single file - the first mapping is done, it may map the file on the lower rdonly layer - the other mapping modifies the contents - when a page in the first mapping accessed again, the page is read from the upper layer. Right? J. R. Okajima -- 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
