| pwnguin | wtf | 00:04 |
|---|---|---|
| CarlFK | can it_rsa hold multiple private keys? | 00:07 |
| pwnguin | sure | 00:12 |
| pwnguin | but you probably wanted id_rsa ;) | 00:12 |
| CarlFK | er, yeah, that. | 00:13 |
| CarlFK | thaks | 00:13 |
| pwnguin | actually, i donno about id_dsa | 00:14 |
| CarlFK | I would think ssh would have an option to specify which key it tried to use | 00:15 |
| CarlFK | if it supported multiple keys in one file | 00:15 |
| pwnguin | or perhaps it tries all of them ;) | 00:16 |
| pwnguin | but i dont quite understand why -kernel is the place to ask about ssh | 00:16 |
| CarlFK | it isn't. I got confused :) | 00:19 |
| CarlFK | ... for linux? made me think this was #linuxhelp :) | 00:20 |
| pwnguin | ok ;) | 00:20 |
| === Zhenech_ is now known as Zhenech | ||
| soren | How do I pass a paramater to the modules that you're now compiling into the kernel? | 08:08 |
| soren | <modulename>.<paramter>=<value> on the kernel command line, perhaps? | 08:09 |
| smb_tp | soren, put them into a file in /etc/modprobe.d. Format "options <module> <name>=<value>" | 08:21 |
| smb_tp | soren, Oh forget it | 08:21 |
| smb_tp | Should get my eyes open | 08:21 |
| smb_tp | Yeah, yours is correct | 08:21 |
| soren | So there's no way to change these values, since I can't rmmod and then modprobe with new options? | 08:35 |
| soren | *sob* | 08:35 |
| smb_tp | soren, If the code has no /proc or sysfs interface I fear not. | 08:37 |
| soren | Oh, right. | 08:37 |
| soren | AFAIUI, all module paramaters are exposed in sysfs these days? | 08:37 |
| soren | Althought, they might be read-only. :( | 08:37 |
| mjg59 | soren: /sys/module/modulename/parameters | 08:37 |
| mjg59 | Should be there even if it's statically linked | 08:38 |
| soren | mjg59: But that doesn't necessarily mean I can change the value. Some might require a reinitialisation. | 08:38 |
| mjg59 | soren: Right | 08:40 |
| mjg59 | If it's marked read/write then it should work on the fly | 08:40 |
| soren | Hmm.. I don't even see processor.max_cstate exposed in sysfs anymore. | 08:41 |
| soren | if the module_param is created with mode 0000, does that mean it doesn't even get exposed in sysfs? | 08:42 |
| soren | include/linux/moduleparam.h suggests that that is indeed the case. | 08:47 |
| soren | So I lose. :( | 08:47 |
| soren | I have a laptop that makes a really annoying noise when on AC in C3 and C4, so I want to set max_cstate=2 when on AC and max_cstate=4 when on battery. I don't see a way to do that now. | 08:48 |
| mjg59 | You can use the pm_qos stuff to mimic that | 08:50 |
| mjg59 | If you set the dma latency to a number smaller than the C3 latency | 08:50 |
| soren | *chuckle* | 08:51 |
| soren | Well, yes, that would work. | 08:51 |
| soren | Ok, so how do I find the relevant numbers? | 08:52 |
| soren | And once I find it, I just write that as a signed 32 bit integer to /dev/cpu_dma_latency and hold it open until I switch to battery? | 08:54 |
| soren | mjg59: in /proc/acpi/processor/CPU0/power, the C3 line reads (among other things, of course): "latency[057]", and the same number for C2 is 001... So I just put e.g. 56 in /dev/cpu_dma_latency ? | 08:57 |
| mjg59 | soren: Yeah, though I can't remember if the units are the same | 09:00 |
| soren | mjg59: I'm not sure how to find out. include/acpi/processor.h just says the latency attribute is a u32. No mention of units. | 09:05 |
| mjg59 | soren: I /think/ it's usec | 09:09 |
| soren | Lovely. That's what /dev/cpu_dma_latency expects as well, apparantly. | 09:10 |
| soren | mjg59: Thanks. I'll tyr. | 09:10 |
| soren | try, even. | 09:10 |
| soren | mjg59: It seems to work. Thansk! | 09:46 |
| soren | Thanks, even! | 09:46 |
| soren | (typing is hard) | 09:46 |
| mdz | evening | 10:16 |
| mdz | (wrong window) | 10:16 |
| marijus | hello, did anyone mage to build 2.6.29-rc1? i tried yesterday but build failed... | 12:27 |
| marijus | sorry typo... mage=manage | 12:27 |
| TimStarling | how do you debug the kernel in ubuntu? | 13:17 |
| TimStarling | just stare at the source until the truth becomes clear? | 13:17 |
| TimStarling | the buddha method? | 13:20 |
| apw | TimStarling, some of that yes | 13:47 |
| cking | TimStarling: a combination of staring at the source and also the use of printk() :-) | 13:48 |
| apw | some bits have debug you can enable, others you add as you stare | 13:48 |
| TimStarling | I have a production server with a top that looks like this: http://p.defau.lt/?84j7MTR_v4d7BUgx5E91bw | 13:50 |
| TimStarling | it works just fine for a few days, then dies | 13:51 |
| TimStarling | I could add printk() all over the whole kernel (one of us thinks the bug could be pretty much anywhere) | 13:51 |
| TimStarling | but a few days' worth of output might be a bit ugly | 13:51 |
| apw | is that mysql really 30GB ? | 13:52 |
| apw | how much ram do you have? | 13:52 |
| TimStarling | 32 GB | 13:52 |
| apw | can you define dies | 13:52 |
| soren | Erk... Those kswapd processes don't look too good. | 13:53 |
| TimStarling | connections to mysql time out, attempting to attach with strace hangs forever | 13:53 |
| TimStarling | soren: no shit | 13:54 |
| apw | how is mysql aquiring all that memory? large shm segments? something else? | 13:54 |
| soren | You only have 1GBof swap? | 13:54 |
| TimStarling | 30GB is normal | 13:54 |
| TimStarling | 31 actually | 13:54 |
| apw | i would suspect the machine is trying to find something to release cause it has no swap | 13:55 |
| soren | With 32 GB of RAM and a mysql server that wants to eat 31 GB of memory, 1 GB of swap sounds like a disaster waiting to happen. | 13:55 |
| apw | and if the memory mysql has is anonymous this can trigger almost infinite list active/inactive list scanning | 13:55 |
| TimStarling | it may be that the margin is too small, our DBA likes to set it real small | 13:55 |
| apw | in older kernels, what version is this | 13:55 |
| TimStarling | Linux db18 2.6.24-22-server #1 SMP Mon Nov 24 20:06:28 UTC 2008 x86_64 GNU/Linux | 13:56 |
| TimStarling | stock ubuntu kernel | 13:56 |
| apw | yep ... .24 does not have the fixes for that | 13:56 |
| soren | What else is running on the machine? | 13:57 |
| soren | The run queue is ~22.. | 13:58 |
| TimStarling | http://p.defau.lt/?GNY7y_PM7vcQfy4C4bf0xQ | 13:59 |
| TimStarling | could be FS-related, with the logrotate processes | 14:01 |
| TimStarling | but I've seen OOM conditions crash ubuntu kernels before so adding a bigger margin is an obvious thing to try | 14:01 |
| TimStarling | apparently changing the FS was already tried | 14:02 |
| TimStarling | could be a block driver | 14:02 |
| apw | i would suspect the unevicatable pages problem at first glance, kswapd's running madly and achieving nothing | 14:02 |
| apw | note they arn't in D writing stuff, they are running | 14:02 |
| apw | the changes to fix that are major and so not likely to appear in a hardy kernel | 14:02 |
| apw | _if_ the memory that mysql is at least in theory swappable adding swap that will never be used may prevent the issue (iirc) | 14:03 |
| TimStarling | are there fixes in 8.10 that I should know about? | 14:03 |
| apw | i believe the fixes are in 2.6.28, so that would be jaunty | 14:04 |
| apw | possibly adding swap would tell you if that is the issue, though getting it back will be hard with only 1gb by default | 14:05 |
| TimStarling | the easiest thing is to reduce mysql's memory usage back to 28 or so | 14:06 |
| apw | if it is reliable there yes | 14:07 |
| apw | if the problem is the spinning lists issue, then that tended to get reported by people who had 32GB of ram or more | 14:08 |
| apw | and tended to have 0 swap as 'who needs swap with this much ram' | 14:08 |
| TimStarling | mysql's memory usage is very stable, it just allocates a big chunk at startup and uses it for most things | 14:08 |
| TimStarling | we know enough to not set swap=0, lots of bugs if you do that | 14:09 |
| TimStarling | ok, going to reboot it, last chance if you want more data | 14:10 |
| === ubot3` is now known as ubot3 | ||
| TimStarling | presumably there's some page table overhead, what's the effective amount of memory available for mmap() if there's 32GB physical? | 14:22 |
| TimStarling | I'm just wondering if that 30.9GB virtual figure for mysql was hitting it | 14:23 |
| apw | i tend to work on the rule of thumb that 10% is used by the system but you were clearly 'at the end' as you kswapd was awake | 14:24 |
| apw | you are only talking about having 1.1GB free, i have some 180MB missing even before the kernel gets going for the kexec kernel, so you are squeezing the entire system (other than mysql) into 900MB | 14:42 |
| TimStarling | mmm | 14:45 |
| TimStarling | looks like our (stable) 16GB servers have about 1.7GB free for non-mysql stuff | 14:48 |
| TimStarling | so I should probably be thinking about keeping the same proportion free, ~3.4 | 14:49 |
| TimStarling | we would like to have graceful OOM behaviour at some point, we've had a lot of trouble with that on our application servers | 14:50 |
| TimStarling | because they have a load-dependent memory usage | 14:50 |
| TimStarling | maybe we should package our own kernels | 14:51 |
| rtg | soren: is there any reason we should enable CONFIG_NFSD_V4 in the hardy -virtual flavour? | 15:06 |
| rtg | s/should/shouldn't/ | 15:06 |
| soren | rtg: I can't think of any, no. | 15:09 |
| rtg | soren: thanks. looks like it must have been an oversight. | 15:10 |
| === TimStarling is now known as Tim-away | ||
| persia | Good day. I'm trying to understand the difference between the "lpia" and "lpiacompat" kernel flavours. A diff -u of the config confuses me, as config.lpia seems to have CONFIG_M586=y and config.lpiacompat seems to have it unset, which is contrary to the information I have previously received. Is there a set of known devices on which the lpia kernel is not expected to work? | 16:25 |
| rtg | persia: lpiacompat was built for a standard PC, e.g. a non-Atom CPU. | 16:27 |
| rtg | at least, if I recall correctly. | 16:27 |
| persia | rtg, That's the information I had before, which is why I'm confused at the config values I'm seeing. | 16:27 |
| persia | Atom doesn't need CONFIG_M586=y and many "standard" PCs (e.g. Via C7M) do. | 16:28 |
| rtg | where is Amit? He knows all these details. | 16:29 |
| persia | You ask the hard questions :) | 16:29 |
| rtg | soren: where does the JeOS kernel image come from in Intrepid? | 16:39 |
| soren | rtg: The server image. | 16:39 |
| soren | It's the same image, with a stack of modules ripped out. | 16:39 |
| soren | I think BenC calls it subflavours? | 16:39 |
| rtg | soren: this guy is complaining that NFSv4 doesn't work, but it _is_ enabled. | 16:39 |
| rtg | ah, perhaps too may debs are ripped out? | 16:40 |
| apw | sconklin, ok ... you have filed a bug for the apport changes. acording to sources (#ubuntu-bugs) it seems the appropriate thing to do is to share that bug for all the changes for this overall feature so that they all have the same number and track together | 16:45 |
| persia | Well, assuming they are all related to the same issue. | 16:46 |
| sconklin | apw: that makes a lot of sense | 16:46 |
| sconklin | I'm glad I gave it a generic title | 16:46 |
| apw | it can be changed anyhow! | 16:47 |
| === asac_ is now known as asac | ||
| fabbione | hi gusy | 18:47 |
| fabbione | who is in charge of the hardy-updates tree? | 18:47 |
| fabbione | rtg: ? | 18:48 |
| rtg | fabbione: dude | 18:48 |
| rtg | fabbione: uh, smb_tp is the Hardy guy | 18:49 |
| fabbione | rtg: hey.. who does pull from linux-2.6.24.x into hary tree? | 18:49 |
| fabbione | something is hutterly wrong in the kernels you are releasing | 18:49 |
| fabbione | smb_tp_: you there? | 18:49 |
| rtg | how so? | 18:49 |
| fabbione | there are missing commits | 18:49 |
| fabbione | and changelogs are missing entries | 18:49 |
| rtg | missing from stable? | 18:49 |
| smb_tp_ | fabbione, I am | 18:49 |
| fabbione | yes | 18:49 |
| fabbione | smb_tp_: i am looking at linux (2.6.24-23.46) hardy-proposed; urgency=low | 18:50 |
| fabbione | according to the changelog: | 18:50 |
| fabbione | lots of entry for bug: #301608 | 18:50 |
| fabbione | that is merging 2.6.26.4 into hardy | 18:50 |
| fabbione | but upstream 2.6.24.4 has: | 18:50 |
| fabbione | commit 68b498d251d97de9adda518fda42cfe1451063b7 | 18:50 |
| fabbione | Author: David S. Miller <davem@davemloft.net> | 18:50 |
| fabbione | Date: Thu Mar 6 14:47:20 2008 -0800 | 18:50 |
| fabbione | SPARC64: Loosen checks in exception table handling. | 18:50 |
| fabbione | [SNIP] | 18:50 |
| fabbione | that is missing from the hardy tree completely | 18:50 |
| fabbione | or at least is not in the released tarball | 18:51 |
| rtg | I think thats because we haven't incorporated all of the stable commits in Hardy as we have for Intrepid. smb - is that still the case? | 18:51 |
| fabbione | this is an example of a missing commit | 18:51 |
| fabbione | broken changelog: | 18:51 |
| fabbione | * Linux 2.6.24.6, 2.6.24.7 | 18:51 |
| fabbione | - LP: #301634 | 18:51 |
| smb_tp_ | rtg, No the intention was to gte all. | 18:51 |
| smb_tp_ | Let me see | 18:51 |
| fabbione | ^^ points to the same bug as 2.6.24.4 and they have no references to the 2 security bugs fixed in those 2 upstream releases | 18:52 |
| fabbione | smb_tp_: i simply need to know if you are going to pull them all or not.. | 18:52 |
| fabbione | as easy as it, it means for me removing ubuntu from all my machines or keeping it around | 18:53 |
| smb_tp_ | fabbione, They should all get pulled | 18:53 |
| fabbione | smb_tp_: ok then you should check why that one is not there | 18:53 |
| fabbione | 68b498d251d97de9adda518fda42cfe1451063b7 | 18:53 |
| fabbione | i know this is missing because without it my hardy sparc firewall doesn't boot | 18:53 |
| rtg | fabbione: its in the hardy git repo. | 18:54 |
| fabbione | rtg: it's not in the released tarball | 18:54 |
| rtg | it may not have been promoted to -updates yet | 18:54 |
| fabbione | rtg: it is according to the changelog... | 18:54 |
| fabbione | i don't use proposed.. that kernel has been copied from proposed to updates | 18:55 |
| rtg | fabbione: gimme a minute.... | 18:55 |
| fabbione | sure even 20 | 18:56 |
| fabbione | i am honestly worried that something in the release process went wrong | 18:56 |
| fabbione | on the other side i also have the issues to keep my machines running :) | 18:56 |
| fabbione | i am sure you can understand | 18:56 |
| fabbione | anyway you'll sort it out :) | 18:56 |
| rtg | fabbione: 2.6.24-23.46, right? | 18:57 |
| fabbione | yes | 18:58 |
| fabbione | do you need any more info? | 18:59 |
| smb_tp_ | fabbione, We well do | 18:59 |
| fabbione | my wife is about to yell at me if i don't show up | 18:59 |
| smb_tp_ | fabbione, No I don't think so | 18:59 |
| fabbione | ok | 18:59 |
| fabbione | i'll pass by in about 2 hours.. | 18:59 |
| fabbione | root@vultus5:~/linux-2.6.24# patch -p1 < ../fix_sparc.diff | 19:00 |
| fabbione | patching file arch/sparc64/mm/fault.c | 19:00 |
| fabbione | ^^^fix_sparc is that commit on top of that kernel.. | 19:00 |
| fabbione | so it is missing somehow :) | 19:00 |
| fabbione | later! | 19:00 |
| fabbione | re | 19:40 |
| fabbione | rtg, smb_tp_: found anything? | 19:41 |
| smb_tp_ | fabbione, Yes, found some patches missing (including yours) for 2.6.24.3->2.6.24-4 | 19:42 |
| fabbione | smb_tp_: ok! | 19:42 |
| smb_tp_ | I did not understand however, the thing about 2.6.24.6/7 | 19:42 |
| fabbione | that's something to do with changelog | 19:42 |
| fabbione | not sure if it's automatically generated or manually done | 19:42 |
| fabbione | but: | 19:42 |
| smb_tp_ | automatically | 19:42 |
| fabbione | then it's wrong :) | 19:42 |
| fabbione | look at the same kernel changelog | 19:43 |
| fabbione | * V4L: Fix VIDIOCGAP corruption in ivtv | 19:43 |
| fabbione | - LP: #301634 | 19:43 |
| fabbione | * Linux 2.6.24.6, 2.6.24.7 | 19:43 |
| fabbione | - LP: #301634 | 19:43 |
| fabbione | ^^ last two entries for that release | 19:43 |
| fabbione | .6 and .7 points to the same bug as .4 | 19:43 |
| fabbione | (or .5... doesn't matter) | 19:43 |
| fabbione | 2.6.24.6 fixes one bug, not reported in the changelog | 19:44 |
| fabbione | .7 fixes another bug.. not reported in the changelog | 19:44 |
| fabbione | as long as the fixes are there, this is "minor" but makes the changelog incomplete | 19:44 |
| smb_tp_ | There might be some not in that log because they got fixed before with another name potentially | 19:44 |
| fabbione | worth checking tho | 19:45 |
| fabbione | need to reboot my firewall.. brb | 19:45 |
| smb_tp_ | The updates were only to track importing the patches from -stable that not yet went into hardy | 19:45 |
| fabbione | gotcha | 19:49 |
| fabbione | re | 19:49 |
| fabbione | well at least that fix works :) | 19:49 |
| rtg | smb_tp_: I think I remember pointing out that there was a typo in the changelog for that bug number. | 19:49 |
| maxb | ooi, what does SAUCE mean in Ubuntu kernel changelogs? Googling was unfruitful | 19:51 |
| smb_tp_ | maxb, That is a patch that is not (yet) upstream | 19:51 |
| rtg | maxb: we use it to denote patches that are either not upstream, or patches that will never get upstream | 19:51 |
| smb_tp_ | rtg, Hm, somehow I am blind to that. I posted the missing 6 to the list | 19:54 |
| rtg | smb_tp_: you are blind to what? | 19:55 |
| fabbione | smb_tp_: did you check that manually or a git pull did show them? | 19:55 |
| rtg | oh, the typo? | 19:55 |
| smb_tp_ | rtg, yes | 19:55 |
| smb_tp_ | fabbione, I compared the export names and checked all missing from my list | 19:55 |
| rtg | smb_tp_: maybe it was a different changelog entry. | 19:56 |
| fabbione | smb_tp_: it might be wise to check the whole tree tho.. | 19:56 |
| fabbione | smb_tp_: just to make sure other bits didn't get lost in other pulls | 19:56 |
| smb_tp_ | fabbione, I will double check that | 19:57 |
| fabbione | smb_tp_: is linux_2.6.24.orig.tar.gz a pristine copy from upstream or is it generated from your git trees? | 19:57 |
| fabbione | smb_tp_: if it's a pristine copy from upstream, then it's "simple"... | 19:57 |
| fabbione | if it's generated from your git tree, you want to check the whole thing from scratch | 19:57 |
| rtg | fabbione: its pristine from upstream | 19:58 |
| fabbione | rtg: ok.. then it's simple.. | 19:58 |
| smb_tp_ | fabbione, don't think that simple the orig is the tree at point of first release | 19:59 |
| fabbione | smb_tp_: yes it's simple in git.. you can just branch out v2.6.24 in git and then compare the commits in your tree with whatever is in 2.6.24.x | 20:00 |
| fabbione | smb_tp_: everything local to ubuntu has proper UBUNTU or SAUCE tags. EVerything else either matching commits (everything in .24.x should be there) or a very detailed commit entry | 20:00 |
| fabbione | but starting from v2.6.24 tag and going, will reduce the load a lot | 20:01 |
| fabbione | anyway.. again... you will sort it out :) | 20:01 |
| smb_tp_ | I guess so :) | 20:02 |
| fabbione | you are all young guys full of energy :) | 20:03 |
| smb_tp_ | who? young? :) | 20:04 |
| smb_tp_ | fabbione, rtg Ok, I went through the remaining commits of 4,5 and 6. Looks like those from 3 were the only missing ones | 20:15 |
| fabbione | "Remote root kernel exploit..." ... | 20:16 |
| fabbione | :) | 20:16 |
| fabbione | ^^doens't exist but can scare the hell out of people ;) | 20:16 |
| smb_tp_ | heh, well you can scare people even by "panic can't find /" as a fortune message. :) | 20:18 |
| fabbione | speaking of which.. do I get a pony for finding this problem? :) | 20:25 |
| * fabbione really really wants a pony | 20:25 | |
| rtg | fabbione: I'll buy you a beer the next time we cross paths, how about that? I can't afford a pony. | 20:25 |
| smb_tp_ | Me neither | 20:26 |
| smb_tp_ | But we can make two beers of it | 20:26 |
| fabbione | rtg: ahha works for me.. | 20:26 |
| fabbione | rtg: even if i doubt somebody will ever fly me to a UDS or anything :) | 20:26 |
| smb_tp_ | fabbione, There might be other opportunities ... :) | 20:28 |
| fabbione | smb_tp_: very unlikely tho.. i am located in DK.. | 20:28 |
| smb_tp_ | I'm in DE (just one letter difference) :-P | 20:28 |
| fabbione | smb_tp_: well you could.. rtg might be problematic :) | 20:29 |
| rtg | fabbione: Its Barcelona in the spring... | 20:29 |
| fabbione | rtg: again? | 20:29 |
| fabbione | we have been close to Barcelona | 20:29 |
| fabbione | rtg: do you have dates already? | 20:30 |
| rtg | It was Seville last time in Spain. this one is somewhere in the Catelonia district. May 22 I think. | 20:30 |
| fabbione | rtg: there was one before Seville .. a long time before Seville.. in a small city close to Barcelona :) | 20:30 |
| fabbione | rtg: at that time the kernel team was made of me and.. me... | 20:31 |
| rtg | ah, I wasn't around for that one. | 20:31 |
| fabbione | nope :) | 20:31 |
| fabbione | not even Ben was there | 20:31 |
| rtg | UDS - 25-29 May | 20:31 |
| fabbione | IIRC it was right after warthy release | 20:31 |
| fabbione | ok.. i'll keep an eye | 20:31 |
| fabbione | can't efford to fly on my own.. maybe i can find a sponsor or two | 20:31 |
| rtg | send an email to Mark :) | 20:32 |
| fabbione | he is not my only sponsor :) | 20:32 |
| fabbione | night guys | 20:33 |
| fabbione | take care | 20:33 |
| fabbione | and try to get those fixes out :) | 20:33 |
| fabbione | so i can finally stop building my kernels ;) | 20:33 |
| rtg | they'll percolate in -proposed for awhile. Should be uploaded in the next day or so. | 20:34 |
| smb_tp_ | Right, I am on it | 20:35 |
| fabbione | yeah that's fine... | 20:35 |
| fabbione | day more, day less.... worst case /. will have a nice story of 100's of Ubuntu machines being r00t3d :D | 20:35 |
| laga | is there a new root exploit? | 20:36 |
| tjaalton | hum, how come linux-libc-dev is only for i386/amd64/armel? since it contains the drm headers now the xserver build fails on other archs (no drm.h) | 22:53 |
| tjaalton | although armel fails too.. | 22:54 |
| === Tim-away is now known as TimStarling | ||
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