From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <7bab0d6b4131bd4f501b012f531b6426@rei2.9hal>
Date: Sun, 10 Mar 2013 00:14:49 +0100
From: cinap_lenrek@gmx.de
To: 9fans@9fans.net
In-Reply-To: <65D43A00-7F64-461A-B021-1B912C63AE4E@ar.aichi-u.ac.jp>
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Subject: Re: [9fans] dirty blocks in cwfs
Topicbox-Message-UUID: 25ac84b4-ead8-11e9-9d60-3106f5b1d025

this is correct. in general, the filesystem repairing aside, dump
will always just visit blocks that are referenced in the filesystem.

for example, if you have 0 dirty blocks and then temporarily create
100MB file and then delete it *before* it is dumped. then you got
100MB of dirty blocks in the cache. these blocks will not be cleaned
out by dump as the blocks are not referneced in the filesystem. these
blocks belong to no files but are chained in the free list. these
blocks are not lost. they will be used when allocating storage for
files. if these files get dumped, the dirty pool shrinks.

--
cinap