Update docs

extratype · Dec 9, 2021 · 389896f · 389896f
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diff --git 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
@@ -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