Date: Wed, 5 Apr 1995 08:30:25 -0700 (PDT) From: Poul-Henning Kamp <phk@ref.tfs.com> To: bde@zeta.org.au (Bruce Evans) Cc: davidg@Root.COM, luigi@labinfo.iet.unipi.it, hackers@FreeBSD.org Subject: Re: swap always use at least 64KB ? Message-ID: <199504051530.IAA08540@ref.tfs.com> In-Reply-To: <199504051052.UAA16461@godzilla.zeta.org.au> from "Bruce Evans" at Apr 5, 95 08:52:05 pm
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> > The first swap block is always pre-allocated. This was done to work around > >a problem with people putting their swap partition at the beginning of their > >disk (the system would happily try to destroy the label). I suppose it would > >be better to change swapinfo/pstat to not include the first block of swap > >space in its report. > > There must be bugs in the write protection of the label for that to happen. > > The diskslice "driver" snoops on writes to label sector(s) and rejects > writing of invalid labels even when write protection is off. Sure, but then you would crash with a "swap pager write error" instead... -- Poul-Henning Kamp <phk@login.dknet.dk> -- TRW Financial Systems, Inc. 'All relevant people are pertinent' && 'All rude people are impertinent' => 'no rude people are relevant'
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