| --- | Log | opened Wed Apr 23 00:00:02 2008 |
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| 00:33 | <caleb`> | hi guys |
| 00:33 | <caleb`> | i <3 linode |
| 00:33 | <caleb`> | kthx |
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| 01:11 | <friendly_fire> | 3.2-testing works great so far |
| 01:17 | <fuzzy> | which distro? |
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| 10:21 | <kasimon> | hi, i'm having trouble with frequent stallings/hangups on my xen instances since i updated to 3.2 this morning |
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| 11:33 | <trollasaurus> | Xen 3.2.0 is working fine for me (except for my OpenSolaris VMs, which no longer work at all) |
| 11:33 | <Isvara> | Is anyone here familiar with Xen internals? Particularly xenstore/xenbus. |
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| 11:40 | <movement> | Isvara: best just to ask your question |
| 11:40 | * | movement wonders if Isvara is *the* Isvara |
| 11:40 | <mrj_> | trollasaurus: there was a fix in a recent 3.2.1-rc for opensolaris |
| 11:40 | <Isvara> | Uh oh. Movement is probably /the/ movement. |
| 11:40 | <movement> | hah! |
| 11:41 | <trollasaurus> | mrj_, Great... when Xen 3.2.1 is released I'll use it (maybe, eventually -- I just upgraded from Xen 3.0.4-1). |
| 11:41 | <Isvara> | How is physical memory protected from being accessed by the /dev/mem driver? |
| 11:42 | <trollasaurus> | Maybe one day OpenSolaris will fix the bugs they apparently keep introducing. |
| 11:42 | <movement> | trollasaurus: that would be nice :) |
| 11:42 | <movement> | Isvara: it's not. perhaps I don't get your question |
| 11:42 | <movement> | trollasaurus: BTW, it was Xen that introduced the bug. it's fixed in a later opensolaris build too |
| 11:43 | <Isvara> | Oh, I mean in domU, btw. |
| 11:43 | <trollasaurus> | movement, The OpenSolaris people said it was an OpenSolaris bug. |
| 11:43 | <danpb> | trollasaurus: or maybe people will decide that pure paravirt is not a maintainable solution and everyone should concentrate of FV... |
| 11:43 | <trollasaurus> | danpb, Paravirtualization works fine for NetBSD and Linux domains |
| 11:43 | <movement> | trollasaurus: nope. both bugs I'm aware of with 3.2 bits are xen compatibility bugs. |
| 11:43 | <trollasaurus> | movement, http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1219 |
| 11:44 | <danpb> | which is pretty much what this comes down to - maintaining the ABIs is hard, easier to only maintain a HVM abi than an HVM+PV abi.. |
| 11:44 | <movement> | Isvara: are you asking what prevents /dev/mem from reading pages that don't belong to the domu? |
| 11:44 | <danpb> | trollasaurus: that's only becasue far more people test those kernels, so we find the regressions more quickly |
| 11:45 | <movement> | trollasaurus: ah. thought you were talking about a different one. |
| 11:45 | <Isvara> | movement: Yeah. Is it in the /dev/mem driver, one of the functions is calls, or a property of how memory is set up? |
| 11:45 | <trollasaurus> | movement, Nope... I was talking about that one the entire time. |
| 11:45 | <trollasaurus> | Grr. I hate Debian. Grr. Piece of crap, so poorly maintained! |
| 11:45 | <movement> | Isvara: it's a property. not sure of the details of the Linux one, but the basic protection is that if a domU kernel attempts to map a VA to a page it doesn't own, it will fail |
| 11:45 | <movement> | Isvara: /dev/mem will likely pass this mapping failure back to userspace |
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| 13:18 | <movement> | danpb: ping |
| 13:19 | <danpb> | pong |
| 13:19 | <movement> | actually hold on a sec. |
| 13:20 | <movement> | danpb: nope, never mind, I mis-merged the xenconsoled changes. sorry to bother you. |
| 13:20 | <danpb> | np |
| 13:21 | <agile> | bad idea to restart xend with live guests running? |
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| 13:23 | <mrj_> | you can do it on solaris.. You need to be careful of the auto start/ auto stop functionality in xend (not sure if that is still true for Linux) |
| 13:24 | <danpb> | agile: it should work if you have xen 3.1.x |
| 13:24 | <movement> | mrj_: bad idea if you have HVM guests. |
| 13:24 | <movement> | mrj_: until I fix that (sigh) |
| 13:25 | <danpb> | movement: i thought it had been made to work for HVM guests too |
| 13:25 | <danpb> | movement: in so much as xend tracks the PID of qemu via xenstore |
| 13:25 | <agile> | these are all pv, one went nutty and I tried to xm shutdown it and now I can't use xm at all |
| 13:25 | <danpb> | so you no longer get the zombies |
| 13:26 | <movement> | danpb: it's a solaris specific problem. |
| 13:26 | <agile> | using 3.1 |
| 13:27 | <danpb> | agile: if you have libvirt installed you can also try 'virsh destroy' which bypasses most of xend and tells the HV to kill the guest |
| 13:28 | <agile> | danp1, I haven't successfully configured libvirt yet |
| 13:29 | <agile> | stracing the xm commands I see it send xmlrpc requests to the socket file but nothing ever responds :( |
| 13:34 | <agile> | stracing the larger xend process (the smaller one seems to wait on the other) shows it's in a FUTEX_WAIT |
| 13:35 | <danpb> | sounds like it has deadlocked itself |
| 13:35 | <danpb> | putex_wait usually means its in a pthread_mutex_lock() call |
| 13:35 | <danpb> | s/putex/futex/ |
| 13:36 | <agile> | well, guess I'll try restarting xend |
| 13:36 | <icarus901> | agile, ive run into that problem |
| 13:36 | <agile> | short of that I guess I'll have to do something drastic :( |
| 13:36 | <icarus901> | extremely painful, and yes thats about the only conclusion |
| 13:37 | <agile> | the xend init restart is hung too |
| 13:37 | <agile> | sweet :) |
| 13:38 | <danpb> | that's because its gracefully asking xend if it won't mind thinking about shutting down |
| 13:38 | <danpb> | rather than just sending it a SIGTERM explicitly |
| 13:38 | <agile> | I could expedite that request I guess with a kill |
| 13:38 | <danpb> | you'll proably need to kill the python processes directly |
| 13:38 | <agile> | oh.. it came back |
| 13:39 | <agile> | doesn't look like it helped though :( |
| 13:40 | <agile> | hmm.. I don't think it actually restarted, same pids on xend processes |
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| 13:43 | <agile> | ended up sending kill -ILL to the xend with the futex and restarted xend and looks like all is well again and the crazy guest is offline |
| 13:43 | <agile> | woot |
| 13:43 | <agile> | thanks guys |
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| 13:45 | <agile> | guess I need to manually unmount the loopback that guest was using too |
| 13:46 | <icarus901> | good to hear |
| 13:46 | <agile> | how do I do that ? :) |
| 13:46 | <icarus901> | you may have some xenstore corruption though |
| 13:46 | <icarus901> | so be careful; manual inspection may be warranted |
| 13:47 | <agile> | of that guest? |
| 13:49 | <agile> | the other guests are still running and 'appear' unaffected |
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| 13:56 | <agile> | dirty, but I think I'm going to copy the images over to another box and start it there for now |
| 13:56 | <agile> | for that bad guest |
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| 14:19 | <kanetillo> | hi |
| 14:20 | <kanetillo> | im trying to find SuSe's patches for dom0 |
| 14:20 | <kanetillo> | does anybody know where to get them? |
| 14:26 | <kanetillo> | hello? |
| 14:32 | <danpb> | ...the suse download site would be the first place to look |
| 14:32 | <kanetillo> | ive searched there but the only thing i can find are binary rpms |
| 14:33 | <danpb> | they must have source RPMs there too |
| 14:33 | <danpb> | otherwise they're violating the GPL |
| 14:33 | <danpb> | which i rather doubt they'd do |
| 14:33 | <kanetillo> | mybe they have them but they are too dificult for me to find :s |
| 14:35 | <danpb> | http://download.opensuse.org/distribution/10.3/repo/src-oss/suse/src/ |
| 14:35 | <kanetillo> | its not there, they have something here |
| 14:35 | <kanetillo> | http://download.opensuse.org/distribution/10.3/repo/src-oss/suse/nosrc/kernel-xen-2.6.22.5-31.nosrc.rpm |
| 14:35 | <kanetillo> | but i unpack the rpm and i cant see the patches inside |
| 14:38 | <danpb> | its in the kernel-source RPM |
| 14:38 | <kanetillo> | ok, thx a lot |
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| 22:48 | * | movement looks in horror now he realises what xen-sdlfb actually does |
| 22:59 | <movement> | what's in unstable seems much worse though |
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| 23:33 | <icarus901> | movement, the vnc side wasnt much more graceful, though it's improved with the move to qemu |
| 23:33 | <movement> | icarus901: at least it's possible to reconnect, unlike SDL (afaict) |
| 23:33 | <movement> | and it doesn't look at XAUTHORITY and stuff like that (wtf?) |
| 23:33 | <icarus901> | movement, yep, i dont believe SDL sessions can be resumed |
| 23:34 | <movement> | why that code even exists I don't know. |
| 23:34 | <icarus901> | well sdl is very much related to X |
| 23:34 | <icarus901> | in that capacity |
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| --- | Log | closed Thu Apr 24 00:00:47 2008 |
