# I am the Watcher. I am your guide through this vast new twtiverse.
# 
# Usage:
#     https://watcher.sour.is/api/plain/users              View list of users and latest twt date.
#     https://watcher.sour.is/api/plain/twt                View all twts.
#     https://watcher.sour.is/api/plain/mentions?uri=:uri  View all mentions for uri.
#     https://watcher.sour.is/api/plain/conv/:hash         View all twts for a conversation subject.
# 
# Options:
#     uri     Filter to show a specific users twts.
#     offset  Start index for quey.
#     limit   Count of items to return (going back in time).
# 
# twt range = 1 1
# self = https://watcher.sour.is/conv/7cdzhwa
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Linux Kernel：Page Fault 頁異常全面解析**
當程序訪問虛擬內存中的一個頁面時，如果該頁面當前不在物理內存中，就會觸發一個稱爲 "page fault"（頁異常）的異常。操作系統需要處理這個異常，並將所需頁面從磁盤加載到內存中。實現虛存管理的一個關鍵是 page fault 異常處理，其過程中主要涉及到函數 — dopgfault 的具體實現。比如，在程序的執行過程中由於某種原因（頁框不存在 / 寫只讀頁等）而使 CPU 無法最終訪問到相應的 ⌘ Read more