Messages in this thread | | | From | Nikita Danilov <> | Date | Tue, 20 Sep 2005 22:27:00 +0400 | Subject | Re: I request inclusion of reiser4 in the mainline kernel |
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Hans Reiser writes: > Horst von Brand wrote: > > > > > > >Funny that the "texbook algorithms" aren't used in real life. Wonder why... > > > > > Try BSD. If the BSD book can be believed, they use"texbook algorithms".
The "textbook" one-way elevator (as indeed exemplified by FreeBSD's src/sys/kern/subr_disk.c:bioq_disksort()) has well-known weaknesses. For example,
dd if=/dev/zero of=FILE
can easily monopolize device queue and starve accesses to the blocks with low block numbers.
> > ;-)
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