| --- | Log | opened Thu Jan 17 00:00:26 2008 |
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| 04:17 | <forrest_2006> | hi, experts. How to debug the UDP packet loss issues of Xen? |
| 04:18 | <forrest_2006> | where can I find the log of dropped UDP packets? |
| 04:19 | <forrest_2006> | I can't find the related logs in Domain0 and DomU |
| 04:19 | <hensema> | how severe is the loss? |
| 04:22 | <forrest_2006> | it's not stable. sometimes 50% is lost, sometime 20% is lost, sometime no loss |
| 04:23 | <forrest_2006> | we use ttcp to do the UDP test |
| 04:26 | <forrest_2006> | I didn't see the packet drop of xenbrx |
| 04:27 | <forrest_2006> | I'd like to find where the packet is dropped |
| 04:29 | * | hensema is no expert at all in xen networking :s |
| 04:29 | <forrest_2006> | I suspect the packet is dropped in qemu or vif |
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| 05:48 | <koslow> | Hallo |
| 05:48 | <koslow> | !install |
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| 07:33 | <xming> | hi I am running xen 3.1.2 pae and I have trouble running >2.6.23.3 kernels as domu, the console would just hang with "too much" output, then the domu is dead. This does not happend with 2.6.23.1, so I tracked down the piece of code that causes this change, it's this header file http://pastebin.ca/858413 |
| 07:39 | <xming> | don't know why a change from u32 to u64 would cause that |
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| 10:40 | <xming> | I know am repeating this, but anyone knows? |
| 10:40 | <xming> | hi I am running xen 3.1.2 pae and I have trouble running >2.6.23.3 kernels as domu, the console would just hang with "too much" output, then the domu is dead. This does not happend with 2.6.23.1, so I tracked down the piece of code that causes this change, it's this header file http://pastebin.ca/858413 |
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| 16:48 | <movement> | danp1: ping |
| 16:50 | <danp1> | movement: pong |
| 16:51 | <movement> | is xen+ssh libvirt remote method supposed to be insecure? |
| 16:53 | <danp1> | what do you mean ? |
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| 16:55 | <movement> | by defaults the socket's directory is 0755, and anyone with an ssh account can do what they want via libvirtd |
| 16:56 | <danp1> | movement: but the socket itself will be 0700 (the read-write socket), or 0777 for the read-only socket |
| 16:56 | <movement> | ah ha. |
| 16:56 | <movement> | socket perms aren't ignored on linux, huh? |
| 16:57 | <danp1> | movement: hmm, that implies socket permissions *are* ignored on solaris ? |
| 16:57 | <mrj__> | sadly, yes |
| 16:57 | <movement> | that's been standard unix behaviour forever afaik |
| 16:57 | <movement> | it's all about the directory above |
| 16:57 | <danp1> | hmm, well that utterly sucks |
| 16:58 | <danp1> | movement: do you have SO_PEERCRED socket option on Solaris ? |
| 16:58 | <danp1> | movement: if so, we can use that to validate the uid of the calling app |
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| 17:01 | <movement> | danp1: there's a variant, getpeerucred() |
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| 17:02 | <movement> | danp1: but we can't/don't test UIDs on solaris. I think changing the directory perms is the best option |
| 17:02 | <danp1> | movement: can you send a mail to libvir-list about this - i'm kinda busy now, but we can come up with a solution for this... |
| 17:02 | <movement> | rscott_laptop: to quote |
| 17:02 | <movement> | <danp1> movement: but the socket itself will be 0700 (the read-write socket), or 0777 for the read-only socket |
| 17:02 | <movement> | <movement> that's been standard unix behaviour forever afaik |
| 17:02 | <movement> | <movement> it's all about the directory above |
| 17:02 | <danp1> | movement: another option is to turn on authentication on the UNXI socket |
| 17:02 | <movement> | I can't find anything in Stevens about this wrinkle, very strange. |
| 17:03 | <danp1> | movement: with auth_unix_{ro,rw} = "polkit" or "sasl" |
| 17:03 | <movement> | well we're not enabling SASL (yet) |
| 17:03 | <danp1> | the latter can do auth against kerberos, ldap, or whatever else SASL has |
| 17:04 | <movement> | well anyway, mystery solved :) |
| 17:05 | <movement> | for now (short-term) we're just going to squish the dir permissions. |
| 17:06 | <movement> | danp1: btw, danp1, "meet" rscott_laptop, he's mr. libvirt-solaris now :) |
| 17:06 | <danp1> | ok, that will stop you being able to connect in readonly mode, but best you can do for now |
| 17:06 | <movement> | danp1: yep, we're not too worried about that right now I think |
| 17:06 | <danp1> | rscott_laptop: hello ! btw, we have a channel #virt on irc.oftc.net for libvirt related discussions, to avoid irritating Xen people with libvirt specific questions |
| 17:06 | <movement> | oh, you do? |
| 17:08 | <rscott_laptop> | thanks. I'll direct any future questions there. |
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| 22:00 | <icarus901> | danpb, question about qemu+xenstore integration if you have a moment |
| 22:01 | <icarus901> | xenstore-write-vnc-port |
| 22:01 | <icarus901> | under what conditions is it written to xenstore (i.e., necessary config options) and has it ever been broken and/or removed? |
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| --- | Log | closed Fri Jan 18 00:00:04 2008 |
