On Tue, 21 March 2006 14:28:53 -0700, Andreas Dilger wrote:
> On Mar 21, 2006 20:03 +0000, Phillip Lougher wrote:
> > I don't want the lack of a fixed endianness on disk to become a problem.
> > I personally don't think the use of, or lack of a fixed endianness to
> > be that important, but I'd prefer not to change the current situation
> > and adopt a fixed format. I use big endian systems almost exclusively,
> > and I don't like the way fixed formats always tend to be little-endian.
>
> If you want to squeak every last ounce of performance out of the filesystem,
> just have it declare two filesystem types - one for the little-endian, and
> one for the bit endian. Generate one of them via "sed" from the other, to
> rename the functions, exports, etc, so they don't conflict. Then, depending
> on the superblock magic it will mount the right filesystem, depending on
> endianness. Since they are separate filesystems, normally only one module
> or the other need to be loaded at a time, and there is no runtime overhead.
That would be an interesting idea for quite another purpose:
measurement.
So far, there has been a lack of numbers in this thread. Al mentioned
that conditional branches can be more expensive and I usually trust
his words, but actual cold hard numbers would help more.
> "unlisted-recipients: no To-header on input <;, Jeff Garzik" <[email protected]>,
I fixed this up. No idea what garbled the header.
Jörn
--
My second remark is that our intellectual powers are rather geared to
master static relations and that our powers to visualize processes
evolving in time are relatively poorly developed.
-- Edsger W. Dijkstra
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