Date: Sat, 12 Oct 2013 20:48:33 -0600 From: "Justin T. Gibbs" <gibbs@scsiguy.com> To: Shanker Balan <mail@shankerbalan.net> Cc: "freebsd-xen@freebsd.org" <freebsd-xen@freebsd.org> Subject: Re: FreeBSD Alpha5 amd64 - Citrix Xen 6.2 problem Message-ID: <A438A9A6-39E8-4F25-9B8B-92EDC4ECDBF5@scsiguy.com> In-Reply-To: <7B7BC687-3A64-4B3D-9F90-B73FC6938225@shankerbalan.net> References: <etPan.52541a74.66334873.190@MacBook-Pro-de-Josias.local> <1381247394.22461.31501241.11EE316E@webmail.messagingengine.com> <8F3E4CEF-75BB-4F96-8512-87B21C5AC44E@shankerbalan.net> <525509C4.9010407@citrix.com> <1381319360.6600.31880785.6E83A2F9@webmail.messagingengine.com> <52555FF4.8010107@citrix.com> <1381329411.11572.31947565.7C2A280B@webmail.messagingengine.com> <849AB77F-D2E3-4BFB-B957-F9A9E53D1070@shankerbalan.net> <7B7BC687-3A64-4B3D-9F90-B73FC6938225@shankerbalan.net>
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On Oct 10, 2013, at 3:09 AM, Shanker Balan <mail@shankerbalan.net> = wrote: >=20 > On 10-Oct-2013, at 1:37 PM, Shanker Balan <mail@shankerbalan.net> = wrote: >=20 >> On 09-Oct-2013, at 8:06 PM, Mark Felder <feld@FreeBSD.org> wrote: >>=20 >>> On Wed, Oct 9, 2013, at 8:53, Roger Pau Monn=E9 wrote: >>>> On 09/10/13 13:49, Mark Felder wrote: >>>>> On Wed, Oct 9, 2013, at 2:46, Roger Pau Monn=E9 wrote: >>>>>> On 09/10/13 08:18, Shanker Balan wrote: >>>>>>> On 08-Oct-2013, at 9:19 PM, Mark Felder <feld@FreeBSD.org> = wrote: >>>>>>>=20 >>>>>>>> On Tue, Oct 8, 2013, at 9:45, Josias L.G wrote: >>>>>>>>> Problem with Citrix Xen 6.2 and install from ISO. The = "solution" was >>>>>>>>> remove cd-rom drive from virtual machine. Not possible now = with xen >>>>>>>>> default in GENERIC kernel. >>>>>>>>> Message error:=20 >>>>>>>>> run_interrupt_driven_hooks - still waiting after 300 seconds = for >>>>>>>>> xenbusb_nop_confighook_cb >>>>>>>>> panic: run_interrupt_driven_config_hooks: waited too long >>>>>>>>>=20 >>>>>>>>=20 >>>>>>>> I was going to test this soon... but you're right -- you = probably can't >>>>>>>> install FreeBSD 10 from ISO on Citrix XenServer because of this = bug. >>>>>>>>=20 >>>>>>>> Can someone working on the xen bits test and maybe find a = workaround? >>>>>>>=20 >>>>>>> The "xenbusb_nop_confighook_cb" issue is the only issue which I = am aware >>>>>>> of that prevents CloudStack/XenServer IaaS private clouds from = offering >>>>>>> FreeBSD 10 as a supported OS template. The "vbd-destroy" = workaround is not >>>>>>> possible as the ISO is attached to the VM instance during the = installation. >>>>>>>=20 >>>>>>> A "please pretty please" request to @citrix R&D for the = hopefully last fix >>>>>>> to get FreeBSD 10 running on XenServer+CloudStack. >>>>>>>=20 >>>>>>> The earlier HyperV related panic on XenServer has been fixed in = ALPHA5. >>>>>>=20 >>>>>> Hello, >>>>>>=20 >>>>>> I've taken a look into this and I'm afraid there's no easy way to >>>>>> workaround it from FreeBSD. When Xen is detected all IDE devices = are >>>>>> disconnected, and there's no fine grained way to only disable IDE = disks >>>>>> and not cdrom devices. >>>>>>=20 >>>>>> Could you please contact your XenServer representative, and/or = submit >>>>>> this bug to xs-devel (xs-devel@lists.xenserver.org) mailing lists = in >>>>>> order to get this fixed on XenServer. >>>>>>=20 >>>>>=20 >>>>> Citrix is aware of this as I've contacted several people there and = this >>>>> has been discussed both here and on the xs-devel list. There has = to be >>>>> something FreeBSD can do to work around this issue since Linux and >>>>> NetBSD have no issues. >>>>=20 >>>> Linux and NetBSD have no issues because you probably only tried = them on >>>> PV mode, which doesn't exhibit this issue (also NetBSD doesn't have >>>> PVHVM support, so it's quite clear it won't have this issue). >>>>=20 >>>>> As far as I'm aware the issue has been tracked >>>>> down to badly behaving qemu in XenServer -- they don't use = upstream qemu >>>>> in XenServer (yet), and instead have their own fork. A future = release is >>>>> supposed to merge with upstream qemu. >>>>=20 >>>> The main problem here is that XenServer announces a PV block device = on >>>> xenstore (the cdrom), but then it seems like there's no backend to >>>> handle it, so it hangs on the connection phase. IMHO the problem is = not >>>> with the device model (Qemu), but with the backend that should = handle >>>> this PV device. >>>>=20 >>>> Xen only allows you to either disable all IDE devices or none, so = the >>>> only possible solution I can think of is to not disable anything at = all >>>> and use the emulated devices, which will leave us with very poor >>>> performance (unless I'm missing something, there's no way to only >>>> disable disks but not cdroms). >>>>=20 >>>>> But the fact remains that this is a non-issue on Linux and NetBSD = who >>>>> handle this buggy virtual CDROM without any problems. There has to = be >>>>> some way we can add a quirk on our side so this device doesn't = stop the >>>>> entire boot process. If FreeBSD 10 is released without = out-of-the-box >>>>> support on the premier commercial Xen platform we'll be shooting >>>>> ourselves in the foot and all of this work will be for naught. = Amazon >>>>> isn't the only Xen platform people use. >>>>=20 >>>> You can always use the pre-build VM images I guess (I have not = tested >>>> those, but I expect they should work fine under Xen). >>>>=20 >>>> = ftp://ftp.nl.freebsd.org/pub/FreeBSD/snapshots/VM-IMAGES/20131007/10.0-ALP= HA5/amd64/ >>>>=20 >>=20 >> This is way better. Having ready to import Xen images beats ISO = installation >> any day. Will try on my cloudstack setup later today. >=20 > I converted the QCOV image to VHD and have imported it into = CloudStack. Instance > created from the template also have the "xenbusb" issue at bootup. >=20 > Oh well. >=20 > Thanks for all the help. >=20 > Regards. > @shankerbalan The CDROM issue should be resolved in FreeBSD/head. These fixes will be = include in 10.0-BETA2 as well as the first 11-CURRENT snapshot that should pop = up in the next day or two. The snapshots are announced on the = freebsd-snapshots mailing list. -- Justin
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