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Date:      Thu, 29 Mar 2001 16:53:55 -0800
From:      Bakul Shah <bakul@bitblocks.com>
To:        Kirk McKusick <mckusick@mckusick.com>
Cc:        arch@freebsd.org
Subject:   Re: Background Fsck 
Message-ID:  <200103300053.TAA27553@thunderer.cnchost.com>
In-Reply-To: Your message of "Wed, 28 Mar 2001 21:22:10 PST." <200103290522.VAA06966@beastie.mckusick.com> 

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Dumb question time.  Why would I want to run a background
fsck on an active filesystem? One wouldn't mount an unsafe
filesystem in the first place.  Perhaps you are talking about
background garbage collection on an active fs -- blocks and
inodes not reachable from the root set of objects (root inode
+ freelist + superblock?) recovered lazily.  If this is
really what you have, wouldn't it make sense to call it
something else (e.g. fsgc)?

On a somewhat related note, I have always wondered if the
current fsck algorithm can be significantly improved or if it
is about as efficient as it can be (barring any peephole code
improvements).

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