Messages in this thread | | | Date | Fri, 13 Nov 1998 07:33:39 -0800 | From | "Jeffrey B. Siegal" <> | Subject | Re: linux-kernel-digest V1 #2824 |
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> 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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