get_user_pages() also honors copy-on-write (CoW) semantics. If a write is detected to a non-writable page table entry, an “page fault” is emulated by calling handle_mm_fault, the core page fault handler. This triggers the appropriate CoW handling routine via do_wp_page, which copies the page if necessary. This ensures that writes via /proc/*/mem are only visible within the process if they occur to a privately shared mapping, such as libc.
（作者为南非约翰内斯堡大学非洲—中国研究中心主任）
，这一点在吃瓜网中也有详细论述
The name of this file on disk is usually the name of the database file
Российские Х-35 назвали «ракетами с интеллектом»20:52
February 13, 2026