On Mon, Dec 23, 2013 at 11:42:22AM -0700, Matthew Wilcox wrote: > > Do you know anyone who relay on SIGBUS for correctness? > > Oh, I remember the real reason now. If we install a PMD that hangs off > the end of the file then by reading past i_size, we can read the blocks of > whatever happens to be in storage after the end of the file, which could > be another file's data. This doesn't happen for the PTE case because the > existing code only works for filesystems with a block size == PAGE_SIZE. I see. It's valid reason. Probably, it's better to add comment there. -- Kirill A. Shutemov -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>