Date: Thu, 20 Jul 2006 08:33:46 -0400 From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> To: "Ricardo Branco" <goabranco@hotmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: How does dmesg(8) information survive a reboot ? Message-ID: <44ac74o3px.fsf@be-well.ilk.org> In-Reply-To: <BAY108-F348252E0881013F61ACEE4B5600@phx.gbl> (Ricardo Branco's message of "Wed, 19 Jul 2006 08:08:01 %2B0000") References: <BAY108-F348252E0881013F61ACEE4B5600@phx.gbl>
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"Ricardo Branco" <goabranco@hotmail.com> writes: > I've just tried this Frenzy Live-CD at http://frenzy.org.ua/eng/ a few > hours ago. It's based on FreeBSD 6.1-STABLE. Then I rebooted into my > FreeBSD 6.1-RELEASE box and suddenly dmesg(8) now outputs the content > from the previous 2 sessions with the live-CD and my current session > with the one I have installed. This is great. I have seen those > "Rebooting..." lines but I've always thought they were written to > /var/log/dmesg* right before the actual reboot with dmesg(8) somehow > retrieving them at the next boot. What is the black magic here? It's just a memory buffer. I very much doubt you would see the carry-over between boots if you were doing a cold shutdown rather than a warm reboot...
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