From 389896f80b4b157fffc6a712817a9cd1463c8447 Mon Sep 17 00:00:00 2001
From: extratype <extratype@gmail.com>
Date: Thu, 9 Dec 2021 19:56:34 +0900
Subject: [PATCH] Update docs

---
 docs/TODO.txt   | 2 ++
 docs/design.txt | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/docs/TODO.txt b/docs/TODO.txt
index 3cb3264..8ace857 100644
--- a/docs/TODO.txt
+++ b/docs/TODO.txt
@@ -3,3 +3,5 @@ profile performance (kernel time, user time) for SSD 4K I/O
     data structure
         reinsert_back()
     asynchronous steps
+
+Option: disable zero-fill when unmap: -Z 0 (don't) or 1 (do) (LBPRZ always 0)
diff --git a/docs/design.txt b/docs/design.txt
index bd5366d..fd367d1 100644
--- a/docs/design.txt
+++ b/docs/design.txt
@@ -213,7 +213,7 @@ ChunkDiskWorker:
         no QD for messages
 
 Synchronize pages:
-    flush pages before aligned read/write
+    flush pages before aligned read/write and unmap
     shared lock for page read
     exclusive lock for page miss
     exclusive lock for partial page write: atomic read and write