Date: Wed, 10 Jan 1996 17:15:46 +1100 From: Bruce Evans <bde@zeta.org.au> To: bde@zeta.org.au, msmith@atrad.adelaide.edu.au Cc: hackers@FreeBSD.ORG, phk@critter.tfs.com Subject: Re: Add new slice to running system, comments? Message-ID: <199601100615.RAA29846@godzilla.zeta.org.au>
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>Hmm. Now I'm a little confused 8) Are you saying that the vn device maps >the on-disk location of the file (its block map, I presume) and keeps >this internally to avoid using the fs-specific read/write functions? If >this is the case, then I take everything back and will concentrate solely >on using it 8) The file system keeps the block map. Read the code. The vn driver could keep an optimized form of the block map (one extent for contiguous files, a few extents for slightly discontigous files...). Write the code. Bruce
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