Re: VFS 64-bit clean? Not yet (was Re: large-file-system)

chip@atlantic.net
Sun, 8 Feb 1998 12:56:02 -0500 (EST)


According to Martin Mares:
> I needed to process some multiple-gigabyte files, so I wrote a simple file
> system (no directories, simple block allocation etc., but very fast) capable
> of handling such files.

Fascinating.

> As I noticed some people are trying to make the VFS layer 64-bit
> clean, I announce the filesystem here, so they have something to
> experiment with.

Well, some people may have 64-bit-clean as their goal, but I'm
limiting my horizon to 41- or 42-bit-clean (32-bit block numbers, 512
byte or 1K blocks).

It seems to me that 2048G or 4096G is enough for now, and if I try
to go bigger, then the "struct page" has to get bigger, and that's
a performance hit.

Or am I guilty of chasing a false economy?

-- 
Chip Salzenberg               - a.k.a. -                <chip@pobox.com>
         "Nice shooting, Zanthar!"  "Thanks, Denise."  // MST3K
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