/srv/irclogs.ubuntu.com/2009/09/29/#ubuntu-kernel.txt

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colinmarcHi, I'm getting a complete system crash whenever mdadm tries to recover or create a raid array. When I try in recovery mode there is a call trace, but it is missing from the logs00:54
colinmarcany ideas?00:57
jk-colinmarc: do you get the call trace reported in the 'dmesg' output ?00:59
colinmarcI'm not sure01:01
colinmarcit doesn't say, and it's not present in any of hte logs01:01
colinmarcthe*01:01
colinmarcbtw... I'm running 9.04 x64 (I'm not in the wrong room am I?)01:02
jk-colinmarc: no, this chan is the right one.01:02
jk-just run 'dmesg', it'll dump the contents of the kernel log01:03
colinmarcI just reproduced the error, it reads like [    65.XXXXXX] [<ffffxxxxxxx>] etc01:03
colinmarcwell it doesn't let me type or enter anything once the error happens01:03
jk-ah.01:03
jk-can you get a photo of the screen?01:03
mase_wk_colinmarc: can you enable serial output on the machine ?01:04
colinmarchmm... let me try. It might be a minute01:04
colinmarcfor the picture. what do you mean, serial output?01:04
jk-colinmarc: serial cable connection to another computer01:05
mase_wk_the kernel will be able to output its logging via serial01:05
mase_wk_you can connect to it with minicom or by cat /dev/ttyx01:05
mase_wk_though i would suggest minicom01:06
colinmarchm. I imagine I would need my desktop for that and it's a windows machine and also disassembled right now. Also I don't know if I have the correct cables or anything01:06
colinmarcbut I'm taking a picture...01:07
mase_wk_i'm having some problems building a kernel package on 8.04 which will automatically run update-initramfs. I am passing the --initrd flag to make-kpkg01:07
mase_wk_is there something else I need to do ?01:07
mase_wk_colinmarc: ok01:07
colinmarcalright, I've got a picture. Can I send it through irc?01:09
jk-colinmarc: maybe file a bug, and attach the screenshot?01:10
colinmarcerm01:10
mase_wk_I've also tried setting the environment variable but that doesn't seem to make it either.01:11
colinmarclet me put it up on imageshack01:11
colinmarchttp://img41.imageshack.us/img41/7349/img4876o.jpg that's the entire screen01:13
colinmarcno cursor at the bottom or anything01:13
colinmarcokay, not the entire screen, but almost01:13
colinmarcit's a projector which is why there's no border or anything01:13
jk-colinmarc: can you scroll up at all? (chift+pgup?)01:14
colinmarcnope01:14
colinmarcI thought it might be a sata controller bug, but it's just intel ICH7 as far as I know and it's switched to AHCI01:24
jk-apw / ogasawara: https://bugs.launchpad.net/ubuntu/+bug/394371 looks fixed?01:30
ubot3Malone bug 394371 in linux "boot failure after 2.6.31 kernel upgrade" [High,Incomplete] 01:30
ogasawarajk-: indeed, I'll get it cleaned up01:33
colinmarcso, am I out of luck?01:36
jk-colinmarc: i think a serial console would help us a lot here01:37
jk-other options are to try a more recent kernel; what are you using at the moment?01:37
colinmarcthe latest 9.0401:38
colinmarcerr, I'd check btu I'm currently fscking01:38
colinmarcwhichever is on the download page right now01:38
jk-sure, ok01:38
colinmarc2.6.2801:44
DanaGoh yeah, so the go7007 in upstream seems to be broken.01:53
DanaGbuild fail: http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.32-rc1/BUILD.LOG01:53
DanaGMight be good to disable it.01:55
mase_wk_is there a mailing list for the ubuntu kernel ?02:03
DanaGyeah, I think there is one somewhere.  I just prefer to use either IRC or gmane.02:04
mase_wk_yeh i normally like irc but i'm having some issues that no one seems to know the answer to so i thought i'd post to the list rather 02:06
DanaGI think the wiki thing in /topic has a link to the mailing list.02:08
mase_wk_your right , found it thanks02:08
joshua__hi all05:10
joshua__I'm taking a introduction to Operating Systems class and would like to modify the pid_t fork(void) system call as an experiment05:12
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micahgwould an ipod not mounting be a kernel bug?07:32
amitk_micahg: that would depend on what dmesg is saying.07:39
micahgI have bug 43429507:41
ubot3Malone bug 434295 in ubuntu "Ipod won't mount in 9.04" [Undecided,New] https://launchpad.net/bugs/43429507:41
amitk_micahg: that bug doesn't have much information. Could you run 'apport-collect -p linux 434295' ?07:52
amitk_micahg: or actually 'apport-collect -p linux-image-`uname -r` 434295'07:53
amitk_More info here -> https://wiki.ubuntu.com/KernelTeam/KernelTeamBugPolicies07:53
micahgamitk_: sorry, it's not my bug, I was attempting to move it to the proper package07:54
micahgI can post the request in the bug though07:54
amitk_micahg: that bug doesn't have any info to help fix the bug except that ipod mount doesn't work. And the fact that the ipod shows up as storage and then disappears seems to indicate something else..07:56
micahgamitk_: ok, I'll leave it for someone else with broader knowledge to figure out then08:00
amitk_micahg: it is a good idea for him to run that command though, to collect the necessary info08:01
micahgThanks, I'll add it to the bug report.08:03
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amitk_apw: Can we update the firmware for the rt2870 from http://www.ralinktech.com.tw/support.php?s=2 ? There is a potentially newer version of firmware in the RT3070USB(RT307x) driver on the page (newer date, larger file size)09:53
amitk_apw: how can I tell if the firmware doesn't regress the older cards?09:53
smbamitk_, I am not sure he can hear you09:54
amitk_smb: he went deaf?09:54
smbamitk_, Not exactly just on vacation09:55
amitk_smb: ohh. All week?09:55
smbNo, supposed to be back tomorrow09:55
amitk_ack09:55
smbamitk_, But my feeling would be that firmware update might regress older cards. Depends on how the driver decides to pull it in.09:56
smbSome load different firmware versions for different hw09:56
amitk_smb: the file name is the same. But the "newer" one is shipped with a different driver with a newer date.09:57
smbamitk_, That feels a bit risky. But that is just a guess09:58
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amitk_rtg: hi! Got a firmware question.13:41
rtgamitk: shoot13:42
amitk_Can we update the firmware for the rt2870 from http://www.ralinktech.com.tw/support.php?s=2 ? There is a potentially newer version of firmware in the RT3070USB(RT307x) driver on the page (newer date, larger file size)13:42
amitk_rtg: how can I tell if the firmware doesn't regress the older cards?13:42
rtgamitk: AFAIK testing is the only way. Can you get ant info from RT ?13:43
amitk_do you have a contact there.13:43
amitk_?13:43
rtgnot me.13:43
rtgamitk: how about one of our OEM team mates?13:43
amitk_let me ask about...13:45
ericmsome one reported a failure to detect SMP with recent karmic kernel on AMD 4800+ x214:28
ericmdo that have any relationship with apic?14:28
ericmI seem to remember with hardy I'll have to explicitly add "noapic" to boot a kernel on my AMD 4000+ x214:29
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JFoogasawara: I had the suspicion about the latest Karmic in those two, but I wanted to make sure the mainline build info was in there. Is that wrong?15:09
JFomanjo!15:13
manjoJFo, hi!15:14
JFohowdy15:14
manjohello sir15:14
JFohow are you?15:15
manjodoing ok.. and you ? 15:15
JFosorry I completely forgot to get you another cigar before I left Atlanta15:15
JFonot too bad :)15:15
manjo:) not a problem ... pete is around in austin now 15:15
JFobrb, need to step outside for a minute15:16
JFoback15:21
JFoyeah, you guys have fun in Austin :)15:22
manjodid not get a chance to meet him 15:22
JFoyou didn't?15:22
manjonope ... probably he is pretty busy & tired from all the travel 15:23
JFoI thought you worked with him :-P15:23
manjoheh15:23
JFoyeah, he does travel alot15:23
manjoyou left atlanta right before the floods :)15:24
JFoI know, good timing on my part :)15:31
JFoOne of my colleagues I met in San Francisco is from there. He sisn't even know it was happening until I told him15:32
JFodidn't*15:32
bjf**15:50
bjf** Ubuntu Kernel Team Meeting - Today @ 17:00 UTC - #ubuntu-meeting15:50
bjf**15:50
ogasawaraJFo: I'll preparing an email back to ya about the 5 bugs you triaged, i'll send it in a bit16:03
akgraner_ping ogasawara 16:13
JFono problem ogasawara16:31
gioelehello17:08
gioeleWhat is the meaning of SAUCE, found in a few place in linux-image change logs?17:09
smbgioele, Usually marks patches that are specific to the ubuntu kernel (iow not gone upstream)17:10
gioelesmb: I see. Is is an initialism or an acronym of anything?17:13
smbgioele, Not so much, just making the stew more tasty with sauce ;-)17:14
gioele:)17:14
rtgsmb, its short for 'special sauce'17:24
smbrtg, :) Ok, for me any sauce is good17:24
ogasawaraakgraner: oops, missed your ping earlier17:38
ogasawaraakgraner: let me know if you need something17:38
JFoogasawara: thanks for the feedback17:43
ogasawaraJFo: np, definitely fwd any other bugs you want reviewed17:44
JFocertainly17:44
JFomaybe soon you won't have to check behind me :-P17:44
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smoserhey all,19:12
smoserthe acpiphp.ko module is required for hotplug support in kvm guests (bug 364916)19:13
ubot3Malone bug 364916 in linux "When running Ubuntu as an Eucalyptus VM instance, module acpiphp is not available to be loaded, complicating the use EBS volume" [Wishlist,Fix released] https://launchpad.net/bugs/36491619:13
smoseris there a way that this module could be automatically loaded? 19:13
rtgsmoser, I think you'll have to insmod it via initramfs19:14
smosernote, i'm not interested in /etc/modules or /etc/initramfs-tools/modules, but rather in the module being magically loaded when necessary across the board (similar to how I vaguely understood that e1000.ko is loaded)19:14
smoserthat make sense ?19:15
smoserwe definitely *can* modify our initramfs for uec and/or our vmbuilder output images. but a broader solution would be for that module to automatically load when running on "hardware" that supported it19:16
rtgsmoser, there doesn't seem to be anything in the driver that will trigger loading19:17
rtgsmoser, I think I could build it into the kernel.19:17
smoserrtg, what would you think about that ? is that something reasonable ?19:20
rtgsmoser, yes, its quite reasonable for the ec2 kernel. I'm just trying to figure out how acpiphp gets built at all.19:21
smosernot relavant for ec2. only for uec (-virtual: -generic-pae or -server)19:21
rtgsmoser, oh, that explains it. I'll have to look a bit closer at the server. dunno if I can build it in for sure.19:22
smoserec2 does this via some other xenish hotplug mechanism (i'm not quite sure). acpiphp is how kvm does it19:22
rtgsmoser, I think you're gonna have to go the initramfs route.19:26
smoseri accept your answer, but just curious, why not build in?19:27
rtgsmoser, regression potential for existing platforms. its kind of a major hunk of code to impose at this late date.19:31
smoserfair enough19:31
MyXelf_hello20:17
MyXelf_can please somebody look at bug 43591720:19
ubot3Malone bug 435917 in linux "BUG: scheduling while atomic: swapper - using ppp [kernel 2.6.31-10.35-generic]" [Undecided,New] https://launchpad.net/bugs/43591720:19
rtgMyXelf_, looking20:22
MyXelf_thanks20:22
rtgMyXelf_, https://bugs.edge.launchpad.net/ubuntu/+source/linux/+bug/435917/comments/420:26
ubot3Malone bug 435917 in linux "BUG: scheduling while atomic: swapper - using ppp [kernel 2.6.31-10.35-generic]" [Undecided,New] 20:26
rtgsmb, still around? have you seen anything like bug #435917 ?20:45
ubot3Malone bug 435917 in linux "BUG: scheduling while atomic: swapper - using ppp [kernel 2.6.31-10.35-generic]" [Undecided,New] https://launchpad.net/bugs/43591720:45
rtgI have memories of something like this in Jaunty20:45
smbrtg, Only partially. Hm, not immediatly...20:46
rtgsmb, look at the end of the dmesg20:46
MyXelf_i can't tell for sure, but it never happened in jaunty20:46
MyXelf_at least the frozen system20:47
smbrtg, Yes, I vaguely remember having seen something like this before. But cannot recall whether we came to a solution20:49
rtgsmb, I'm gonna mark it as a regression so it stays on the radar20:49
smbrtg, Yeah, and maybe assign it to me, too. 20:50
rtgsmb, doen20:50
rtgdone*20:50
smbrtg, ok20:51
rtgsmb, do you know how to tag a bug? The LP options keep moving around20:51
smba sec20:52
smbIts another of these little yellow fellows. I'd put regression-potential into it, if that is ok for you20:53
rtgsmb, thats exactly what I was looking for. thanks.20:53
smbrtg, done. These little buttons are somewhat easy to overlook20:54
MyXelf_smb, rtg: can i do anything else to be of help?20:55
rtgmaybe after the 4th or 5th time you remind me, I'll start to remember20:55
rtgsmb, ^^20:55
smbMyXelf_, Not atm. I must get my head into it tomorrow20:55
rtgMyXelf_, your bug should get some attention later this week. I've milestoned it for release20:56
MyXelf_wow, that's awesome20:58
MyXelf_thanks both of you20:58
rysiek|plhi guys20:59
rysiek|plany living souls around?20:59
rysiek|planybody heard about -ck's BFS?21:00
* rysiek|pl teases. probably everybody here has heard about that21:00
rtgrysiek|pl, I've read Ingo's responses.21:00
rysiek|plrtg: to the new -ck's scheduler? where?21:00
rtgLKML21:01
rtgthere was quite a flurry a couple of weeks ago when Colin initially announced it.21:01
rysiek|plrtg: care to sum-up in a sentence? I'd rather not digging through LKML21:02
rtgit ain't ready for prime time.21:02
ali1234cyanogenmod for g1 uses bfs21:02
ali1234i think that's the only place real users are using it yet21:02
rysiek|plrtg: that we all know. question is: a). is there a chance guys at kernel.org will ever consider pluggable schedulers; b). are there any other reasons (besides code maturity and doesnt-scale-to-4096-cores) not to use it?21:03
rtgrysiek|pl, frankly, you'll have to ask Ingo et al those questions.21:04
rysiek|plrtg: ok, thanks; thought you might had that covered ;)21:04
rtgI've zero exposure to it21:04
* rysiek|pl 's gotta test the bugger21:04
rysiek|plI suppose this question had to come up here already, but what the hey21:05
rysiek|plany chances on including -ck/BFS in ubuntu? as a testing kernel maybe?21:06
rtgrysiek|pl, pretty unlikely unless it gets into staging or something.21:06
rysiek|plmhm21:07
rysiek|pland any other scheduler, for that matter?21:07
rtgrysiek|pl, same criteria21:07
rysiek|plright21:09
rysiek|plthanks21:09
ali1234rysiek|pl: i live in hope that someone will make a ppa for it21:12
ali1234actually there's already a ppa but no packages in it yet21:12
rysiek|plinteresting21:13
rysiek|plgotta look into that21:14
rysiek|plali1234: maybe you know how hard/time consuming is setting-up a ppa?21:14
ali1234no, i've no idea, sorry. i know how time consuming a kernel bisect is though :/21:15
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