From: Andre Noll <maan@tuebingen.mpg.de>
Date: Sat, 7 Nov 2020 21:45:27 +0000 (+0100)
Subject: filesystems: Add a paragraph about post-EOF reclaim after crash.
X-Git-Url: http://git.tuebingen.mpg.de/?p=aple.git;a=commitdiff_plain;h=4c316f160f0712366f5a35eadef2ce0dbe21f278

filesystems: Add a paragraph about post-EOF reclaim after crash.
---

diff --git a/Filesystems.m4 b/Filesystems.m4
index 9035de5..e2ac561 100644
--- a/Filesystems.m4
+++ b/Filesystems.m4
@@ -955,6 +955,11 @@ file fragmentation, but they can cause confusion because they are
 accounted identically to other blocks, making files appear to use
 more data blocks than expected. </p>
 
+<p> If the system crashes while preallocated post-EOF blocks exist,
+the space will be recovered the next time the affected file gets closed
+(after it has been opened of course) by the normal reclaim mechanism
+which happens when a file is being closed. </p>
+
 SUBSECTION(«Reverse Mapping»)
 
 <p> This feature was implemented in 2018. It adds yet another B-tree to