Date: Tue, 26 Mar 2013 03:14:52 -0700 From: Colin Percival <cperciva@freebsd.org> To: =?ISO-8859-1?Q?Roger_Pau_Monn=E9?= <roger.pau@citrix.com> Cc: xen-users <xen-users@lists.xen.org>, "freebsd-xen@freebsd.org" <freebsd-xen@freebsd.org> Subject: Re: [Xen-users] Trouble booting FreeBSD i386 PV DomU Message-ID: <5151751C.5080501@freebsd.org> In-Reply-To: <51517407.8040406@citrix.com> References: <CAMCOOJuzLvw=X2M8=6bwKvseGt2h9FgA49L7mtQZwAVEmJ6Ahg@mail.gmail.com> <51516B06.8080704@citrix.com> <51516CAA.3040802@freebsd.org> <51517407.8040406@citrix.com>
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On 03/26/13 03:10, Roger Pau Monné wrote: > On 26/03/13 10:38, Colin Percival wrote: >> On 03/26/13 02:31, Roger Pau Monné wrote: >>> Is Xen i386 PV broken? >> >> Not completely broken, but it's certainly not in a good state. I believe >> it's broken with SMP, for example -- if the "crashed on cpu#7" in your >> output means cpu#7 from the guest, it would certainly explain things. > > My guest only has one vcpu (vcpu#0): Ok, I wasn't sure how to parse that output. >> HVM is the way to go with FreeBSD/Xen. > > Yes, I'm already working on that, and got vector callbacks working on > both i386 and amd64 HVM guests, thanks to Justin T. Gibbs patch. Now I > was trying to boot a PV guest to see how much breakage this change > introduced to PV, but I'm not able to make it work, even without my patches. > > I've replied to this xen-users thread because the author seem to have a > working FreeBSD DomU PV guest, and I was wondering how he did it. From > my POV it seems like PV guests hasn't been working for a long time, > since Xen 3.3 dropped support for non-PAE guests, and the FreeBSD kernel > is detected as non-PAE. I had FreeBSD 8.2-RELEASE and a 9.0-CURRENT @ January 2011 running with PV in EC2 (http://www.daemonology.net/freebsd-on-ec2/, look for "t1.micro instances only") and that used PAE. But it's entirely likely that something got broken in the past two years and nobody noticed because nobody ever uses PV... -- Colin Percival Security Officer Emeritus, FreeBSD | The power to serve Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid
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