| --- | Log | opened Thu Jan 10 00:00:40 2008 |
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| 12:07 | <movement> | OK, ioemu's dirty log shmget() is twice the size of that created by xc_save - htf does that work? |
| 12:08 | <brianw> | *shrug* |
| 12:08 | <danpb> | movement: kernel increases the size of the SHM region ? |
| 12:08 | <movement> | danpb: it's a bug though, right? |
| 12:08 | <movement> | ioemu/xenstore.c vs. xcutils/xc_save.c |
| 12:08 | <danpb> | sounds like it would be |
| 12:09 | * | danpb wishes he had time to get back onto his 'death of xend' project so we didn't have to coordinate save/restore between 3 separate processes |
| 12:09 | <movement> | hmm hold on |
| 12:09 | <movement> | danpb: would be nice :) |
| 12:10 | <movement> | oops, I misread it |
| 12:10 | <movement> | they do match |
| 12:10 | <movement> | (although they don't, if you swim) |
| 12:12 | * | icarus901 pledges danpb assistance should he desire to revisit said project |
| 12:14 | * | mrj_ offers some time |
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| 12:38 | <avi> | hey, I am working on a similar project |
| 12:38 | * | avi runs |
| 12:41 | <icarus901> | do tell |
| 12:42 | <avi> | icarus901: kvm |
| 12:43 | <icarus901> | ..related to a xend overhaul/replacement in what fashion |
| 12:43 | <avi> | no need for xen[d] |
| 12:43 | <icarus901> | thats not quite what we meant |
| 12:44 | <avi> | I know, bad jole |
| 12:44 | <avi> | joke |
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| 13:10 | <danpb> | icarus901: my idea is surprisingly similar actually - basically making it possible to run Xen guests simply by starting a QEMU process + args |
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| 13:10 | <danpb> | icarus901: so in effect it'll "look" the same as KVM from a userspace POV, although obviously with a Xen HV underneath |
| 13:11 | <mrj_> | how are domains managed in kvm? |
| 13:11 | <danpb> | mrj_: by libvirt |
| 13:11 | <danpb> | or you can just manage the QEMU processes directly yourself |
| 13:12 | <mrj_> | danpd: so libvirtd keeps a store of inactive domains for kvm? |
| 13:12 | <danpb> | mrj_: there isn't actually a KVM driver for libvirt - its just all handled by the QEMU driver |
| 13:12 | <danpb> | mrj_: yeah, keep a copy of XML config in /etc/libvirt/qemu |
| 13:13 | <mrj_> | ah, ok... nice and simple :-) |
| 13:14 | <danpb> | mrj_: http://people.redhat.com/berrange/xen-summit-2007-sj/xen-summit-xenite-report.pdf |
| 13:15 | <danpb> | mrj_: that is a 50% not finished doc describing what i'm trying todo |
| 13:15 | <mrj_> | k. I'll check it out... Did XenSource have any comment about it? |
| 13:15 | <movement> | what are your thoughts on xen-api danpb (I can guess, but...) |
| 13:16 | <danpb> | not yet, but then i've not really circulated the doc widely yet as its not finished |
| 13:16 | <danpb> | and i've not submitted the patches for discussion yet either |
| 13:16 | <mrj_> | my only concern would be that they would release their xend replacement after the work was done |
| 13:17 | <danpb> | movement: if we find need to use it in libvirt we will, but for now its not hugely compelling |
| 13:17 | <movement> | danpb: that's not what I mean. |
| 13:17 | <movement> | danpb: if you don't need xend, you don't have anything talking xen-api any more. |
| 13:17 | <danpb> | BTW, my QEMU changes are fully compatible with XenD still |
| 13:17 | <danpb> | #1 priority was to not break any existing code |
| 13:18 | * | movement nods |
| 13:19 | <danpb> | this is all really a bit of research/experimentation still - not got any concrete plans to use it for real yet - needs more experimentation |
| 13:20 | <mrj_> | danpb: how do you do hotplug, etc? |
| 13:20 | <mrj_> | do you need libvirtd for that? |
| 13:20 | <danpb> | mrj_: that's stuff i've not figured out yet |
| 13:20 | <mrj_> | k |
| 13:20 | <danpb> | mrj_: kinda waiting to see how the VirtIO stuff ends up merging in upstream QEMU |
| 13:21 | <danpb> | mrj_: since that'll have similar hotplug requirements to Xen |
| 13:21 | * | mrj_ nods |
| 13:21 | <danpb> | the new '-drive' param in upstream QEMU 0.9.1 will make things nicer too |
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| 13:23 | <mrj_> | what's that param do? |
| 13:23 | <danpb> | its a general way for specifying disks, so we're not stuck with 4 IDE disks forever |
| 13:23 | <danpb> | it can do IDE, SCSI, Flash, paravirt |
| 13:24 | <danpb> | and aligori has a funky BIOS hack to let you boot off any disk too even paravirt |
| 13:25 | <mrj_> | ah, ok. |
| 13:25 | <danpb> | it means XenD would be able to pass disks to QEMU using a regular command line, rather than having to change QEMU to grok xenstore |
| 13:26 | <danpb> | so that'd be another large chunk of Xen specific patches that can be removed from ioemu/ |
| 13:26 | <mrj_> | that would be nice :-) |
| 13:26 | <murb> | grrr quick question to save reading makefile, what envfiroment variable do i need to set to get a pae xen.gz? |
| 13:27 | <danpb> | pae is the default now |
| 13:27 | <murb> | hmm |
| 13:27 | <murb> | so i did something else wrong. |
| 13:27 | <danpb> | since 3.1.0 IIRC |
| 13:28 | <murb> | danpb: i try and avoid 32b stuff |
| 13:28 | <murb> | unfortunly said box is lacking lm :( |
| 13:28 | <danpb> | or maybe its only in the 3.2.x tree |
| 13:33 | <murb> | not even in 3.2.x |
| 13:33 | <murb> | this is unstable |
| 13:33 | <murb> | but export pae=y ; make -C tools clean install # worked |
| 13:34 | <murb> | s/tools/xen/ |
| 13:34 | <danpb> | $ pwd |
| 13:34 | <danpb> | /home/berrange/src/xen/xen-3.1.0-testing.hg |
| 13:34 | <danpb> | $ grep pae Makefile |
| 13:34 | <danpb> | export pae=y |
| 13:34 | <danpb> | it is the default |
| 13:34 | <danpb> | unless you've changed / overridden something |
| 13:37 | <murb> | this is unstable |
| 13:37 | <murb> | fresh hg clone |
| 13:37 | <murb> | could it be doing magic based on what the host is? |
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| --- | Log | closed Fri Jan 11 00:00:46 2008 |
