Date: Fri, 19 Feb 2010 00:56:09 +0100 From: Miroslav Lachman <000.fbsd@quip.cz> To: Andreas Nilsson <andrnils@gmail.com> Cc: Mark Linimon <linimon@lonesome.com>, freebsd-jail@freebsd.org Subject: Re: Emulating different versions of FreeBSD Message-ID: <4B7DD399.2050301@quip.cz> In-Reply-To: <e31a2e1002181129u274a1edeu1d2a1856b3f50c57@mail.gmail.com> References: <e31a2e1002180754u20c52ff5xd3e34ccd19ba1d98@mail.gmail.com> <20100218172634.GA28262@lonesome.com> <e31a2e1002181129u274a1edeu1d2a1856b3f50c57@mail.gmail.com>
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Andreas Nilsson wrote: > On Thu, Feb 18, 2010 at 6:26 PM, Mark Linimon<linimon@lonesome.com> wrote: > >> On Thu, Feb 18, 2010 at 04:54:08PM +0100, Andreas Nilsson wrote: >>> Could the jail architecture be used to run/emulate different versions of >>> FreeBSD on the same machine? >> >> portmgr does that on the package build machines all the time. AFAIK we >> don't do anything special to the kernel/userland we run in the jails. >> >> Of course, you need to make sure that what's in the jail is no newer than >> the native kernel/userland. >> >> mcl >> > > Ok, that sounds great. Thanks for the swift response. So building for > example lsof in a 7.1 jail on a 8.0 host will report it being built on > 7.1-RELEASE-pX? It may depends on uname output. It can be modified by env. variables like UNAME_r etc. (see man uname) > Does it also work to run a 32-bit jail on a 64-bit host? It was discussed here few times so you can search the archive. I am not sure about the results and I didn't have enough time to test it myself. Miroslav Lachman
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