Question about do_wp_page() and lock_page()

[Larry Woodman]

Why is it safe for do_wp_page() to call cow_user_page() without locking
the old_page first?  If a Direct IO read is outstanding on the old_page
or its the buffer to the file_read_actor() cant its contents change
during the COW fault?  Is this not a problem?

Larry Woodman


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/