/srv/irclogs.ubuntu.com/2010/08/19/#ubuntu-kernel.txt

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jk-eep, first victim of yama/ptrace_scope changes: wine will no longer run Rosetta Stone09:05
jk-.. not that it ran that well in the first place, but would indicate that wine uses ptrace() on non-child processes09:09
jjohansenjk-: you can turn yama off09:11
jk-yep09:11
amitkcooloney: did you look at the patches that Tony posted on linux-omap for SMP kernel on UP?09:35
amitkI asked him to post patches so you or someone else can test it09:36
cooloneyamitk: yeah, man09:36
cooloneyamitk: i tested rmk's version 09:36
cooloneyand tony posted a fixing just now09:36
cooloneyi am going to testing that on my board09:36
amitkcool09:37
cooloneyamitk: so we a close to boot smp kernel on beagle, i think.09:37
amitkcooloney: hopefully :)09:37
cooloneyamitk: but the patch changes several important low level assemble line code. 09:38
cooloneyneed more testing and review09:38
amitkcooloney: Tony said that he doesn't think we need to rewrite locking primitives during runtime like is done on x8609:38
cooloneyamitk: no sure about that. spin_lock version is different in smp and up, i think.09:40
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sconklinnot traffic shaping, just saturatign my uplink16:29
sconklinthe tests that failed were obviously ones that were not for ext4, but were not correctly excluded from the tests16:29
smbHm, ok. I think I had at least one about aio but those failed before and after.16:31
* smb goes to reboot the test machine16:31
JFois the -rt kernel being added to main that anyone knows of?17:04
JForather -lowlatency and -preempt17:05
JFoI am being asked about them17:05
JFoapw or tgardner ^^?17:06
tgardnerJFo, preempt is an official flavour for Lucid, not for Maverick17:07
JFoah, I see17:07
JFoanything for the -lowlatency?17:08
tgardnerJFo, not in maverick17:08
tgardnernor lucid17:08
JFotgardner, thank you17:08
JFotgardner, is there any rationale for not including them?17:09
JFoI have been asked that specifically17:09
tgardnerthe -rt guys are providing a kernel AFAIK, so it was duplicated functionality.17:10
JFocool, thanks again tgardner 17:10
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sabdflps ax is hanging over here, known issue? kernel or elsewhere?20:44
sabdflfwiw it gets to  1751 ?        S      0:00 udisks-daemon: polling /dev/sr020:45
keessabdfl: what does "strace ps ax" show it's stuck on?20:46
sabdflread(6, "Name:\tchromium-browse\nState:\tD ("..., 1023) = 78620:47
sabdflclose(6)                                = 020:47
sabdflopen("/proc/1898/cmdline", O_RDONLY)    = 620:47
sabdflread(6, 20:47
keesew20:47
tgardnersabdfl, maverick?20:47
sabdfltgardner: very :-)20:47
tgardnercat /proc/version_signature20:48
sabdflUbuntu 2.6.35-16.22-generic 2.6.35.220:49
sabdfl ~/ $ ls /lib/modules/2.6.35-16-generic/updates/dkms 20:49
sabdflhid.kohid-magicmouse.ko  vboxdrv.ko  vboxnetadp.ko  vboxnetflt.ko20:49
tgardnersabdfl, lots of stable fixes since then. I hate to give you the runaround, but can you install just the -proposed kernel and try again?20:50
sabdflsure, url?20:50
tgardnerone sec20:50
sabdfldidn't realise we had -proposed on maverick20:50
tgardnersabdfl, doh, I was thinking Lucid. never mind.20:51
sabdfl:-)20:51
sabdfli think about lucid often, too :-) best release EVAR20:51
tgardnerthough we do have stable updates in the pipe for Maverick20:51
sabdflhow's .35 treating us?20:51
tgardnernot too bad, but there is a known mm regression in the version you are running. I wonder if thats it20:52
tgardnerogasawara should be releasing an update with a couple of days20:53
keesis it always chromium it blocks on, or is it at random?20:53
tgardnerkees, 'mm: fix page table unmap for stack guard page properly' is what I suspect20:54
keestgardner: what sha is that?20:55
keestgardner: I think we have it in the -security kernels, but I wanted to double-check20:55
tgardnerin the maverick repo its 6106dafae6d0ff50c82bb544b3b999562238504b20:55
mjg59sabdfl: While hung, writing W to /proc/sysrq-trigger should give you the in-kernel backtrace for the blocked task20:56
tgardnersabdfl, you could also reboot to Ubuntu-2.6.35-14.20. Thats based on 2.6.35 _before_ any stable updates (which actually destabilized things a bit)20:57
keesyup20:57
sabdflmjg59: hello there! nice to see you again20:57
sabdflso, echo W > /proc/sysrq-trigger ?20:58
mjg59Yeah, as root20:58
tgardnerecho W | sudo tee /proc/sysrq-trigger20:58
sabdfltgardner: still have it around, iirc, so yes can roll back20:58
tgardnersabdfl, remember you have to hold the shift key just prior to grub getting control or you'lll miss the grub menu20:59
sabdflso, that's put stuff in dmesg?20:59
mjg59Yup20:59
sabdfllots of blech at http://pastebin.ubuntu.com/480605/21:00
mjg59sabdfl: Hm. Sure you did w? And ps is still blocked in read?21:01
tgardnermjg59, anon_vma_prepare, wasn't this what Linus was seeing?21:01
mjg59Yeah, looks like something's very unhappy there21:02
* jjohansen -> lunch21:03
tgardnerI'm pretty sure thats the stack guard regression21:03
sabdflmjg59: just tried again, ps ax in one terminal tab, and the echo W magic in another21:04
sabdflps doesn't get unblocked21:05
mjg59Yeah, ps is pretty solidly dead at that point21:05
mjg59One of those scheduling while atomic errors probably left a lock held21:05
tgardnersabdfl, I think your best bet for now is to use the older kernel until ogasawara get the next stable update uploaded.21:08
sabdflokdokey21:08
ogasawarasabdfl: hoping to upload this afternoon actually.  just have a few more patches I wanted to review and possibly apply.21:08
sabdflother than the vbox bits, which i am not using so doubt they are active, i'm on standard bits with dell m133021:09
sabdflso i wouldn't be surprised if others see the same thing21:09
sabdflthanks leanne21:09
ogasawarasabdfl: I think I've got a test kernel with a fix for that bug 480605, just a sec21:10
ubot2Launchpad bug 480605 in telepathy-haze (Ubuntu) (and 2 other projects) "Repeated subscription request from same user (affects: 12) (dups: 2) (heat: 78)" [Medium,Triaged] https://launchpad.net/bugs/48060521:10
ogasawarabah, not bug, the pastebin21:11
sabdflok, will let you guys know if the next update fixes it21:11
ogasawarasabdfl: bug 618846, http://people.canonical.com/~ogasawara/lp618846/21:11
ubot2Launchpad bug 618846 in linux (Ubuntu) "Kernel 2.6.35.2 reports "scheduling while atomic" (affects: 1) (heat: 6)" [Medium,Fix committed] https://launchpad.net/bugs/61884621:11
sabdflwill reboot to prior kernel. thanks for the help, hope the report was helpful, nice to see you mjg5921:13
* ogasawara drops to grab lunch, back in an hour21:28
joshhuntcan someone provide a pointer to the differences between ubuntu server kernel and desktop kernel? i have found this: https://help.ubuntu.com/10.04/serverguide/C/preparing-to-install.html but was wondering if there are any other differences22:03
tgardnerjoshhunt, there are no source code differences. the only differences are in some of the config options.22:06
joshhunttgardner, ok thanks. that's what i suspected, but wasn't sure.22:07
joshhunttgardner, is there a place where i can download the kernels manually. instead of going through apt, etc?22:09
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keesjoshhunt: I tend to do it through Launchpad. https://edge.launchpad.net/ubuntu/+source/linux22:45
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