Re: linux-kernel-digest V1 #2824
Jeffrey B. Siegal (jbs@quiotix.com)
Fri, 13 Nov 1998 07:33:39 -0800
> From: MOLNAR Ingo <mingo@chiara.csoma.elte.hu>
> Date: Thu, 12 Nov 1998 03:39:28 +0100 (CET)
> Subject: [patch] Re: elevator algorithm bug in ll_rw_blk.c
>
> On Wed, 11 Nov 1998, Philip Gladstone wrote:
>
> > I.e. if you have a queue: 10 20 5 and you insert 25, then
> > you should get 10 20 25 5 and not 10 20 5 25 as currently.
>
> nicely spotted ... unless i'm missing something, this was probably one of
> the oldest Linux bugs :)
I vaguely recall reading in some operating system book that this is modified version of the elevator algorithm
meant increase fairness. Otherwise, the access to block 5 might be delayed a *long* time if lots of high-value
blocks are requested.
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