Re: elevator algorithm bug in ll_rw_blk.c

Linus Torvalds (torvalds@transmeta.com)
15 Nov 1998 19:57:16 GMT


In article <19981113115923.F239@perlsupport.com>,
Chip Salzenberg <chip@perlsupport.com> wrote:
>
>But that's a *one-way* elevator. Ideal elevators are two-way, aren't they?

No.

Two-way elevators are extremely unfair, as they tend to be more in the
middle than at the edges.

And that's completely unrelated to any performance issues (where two-way
elevators tend to have their own problems due to disks being optimized
for one-way accesses).

Linus

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