This document covers versions 18 and earlier.
What This Isn’t Saying
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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.，这一点在手游中也有详细论述
Leon’s old scars will have to wait, anyway. Requiem’s new blood is FBI analyst Grace Ashcroft. Equal parts tenacious and nervous, she’s a fitting lens on the horror portion of Requiem’s split focus between disempowered terror and cathartic action. The story opens with Grace – more acquainted with desk work than field ops – tasked to go over a crime scene at a gutted hotel. She knows the place well, since it holds some horrific memories for her. Still, she heads off with little more than a flashlight and a pistol you’ll never find quite enough ammunition for to feel safe.，这一点在华体会官网中也有详细论述