/srv/irclogs.ubuntu.com/2010/09/19/#ubuntu-kernel.txt

=== MTecknology is now known as NoNickAssigned
=== NoNickAssigned is now known as MTecknology
sconklinhttp://www.engadget.com/2010/09/18/intel-wants-to-charge-50-to-unlock-stuff-your-cpu-can-already-d/04:05
bullgard4At startup my Maverick Beta computer writes after 1,8 s : "Magic number: 10:86:987". What does this number refer to?07:44
=== yofel_ is now known as yofel
bullgard4At startup my Maverick Beta computer writes after 1,8 s : "Magic number: 10:86:987". What does this number refer to?11:44
bullgard4I understand that it designates USERHASH:FILEHASH:DEVHASH. But why does Ubuntu publish these 3 numbers?11:52
=== yofel_ is now known as yofel
u456503Hi all19:46
u456503Is somebody here ?19:48
u456503I'm trying to compile the kernel using this tutorial: https://wiki.ubuntu.com/KernelTeam/GitKernelBuild19:50
u456503I'm using Ubuntu 10.1019:50
u456503but there are some files *.patch to be applied19:53
u456503can some one help ?19:54
u456503hi oracle20:01
oraclehi 20:02
oracleso many kernel updates recently20:02
u456503stable candidates, yes20:03
u456503Do you run an Ubuntu ststem ?20:04
u456503http://twitter.com/gregkh/status/24873562442 from Greg20:06
oracleyes i run two ubuntus20:07
oracle2.6.2720:08
oracleweird20:08
u456503oh, can you explain how to apply the ubuntu patches, on the latest mainile ?20:11
u456503the links: http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.36-rc4-maverick/20:12
u456503and: https://wiki.ubuntu.com/KernelTeam/GitKernelBuild20:13
u456503I am not an expert, if you can help ?20:13
u456503hi chrisccoulson20:17
chrisccoulsonhi u45650320:17
u456503can you view the last discution ?20:18
u456503I'm trying to compile the latest kernel20:19
u456503but there are some patces, not included in mainline20:21
u456503there is somebody to upstream them ?20:22
u456503or I am on the wrong channel ?20:22
u456503in 5 minutes I will quit20:45
etheretic'ello21:35
ethereticrunning iotop, get error "CONFIG_TASK_DELAY_ACCT not enabled in kernel, cannot determine SWAPIN and IO %" making it impossible to analyze the iowait pest i'm afflicted with. ubuntu 10.04 kernel 2.6.32-4.21:39
lifelessttps://bugs.edge.launchpad.net/ubuntu/+source/linux/+bug/53249021:40
ethereticbug or feature?21:40
ethereticah.21:40
etheretich21:40
lifelessits going to be reenabled according to the master bug21:41
lifelessperhaps you need a newer kernel ?21:41
ethereticer. have one handy? not very competent w. linux, btw.21:42
lifelessno, I don't sorry :)21:42
ethereticthought 32-24 was latest. pardon above typo.21:43
etheretic2.6.32-2421:43
ethereticlifeless: i have rtfm'ed on the iowait issue, but found no applicable solutions. it arises when running firefox/oolite/amule, and causes said programs to crash after having paralysed my comp (acer notebook) for 2-30 minutes.21:47
ethereticnot sure how kernel-related it is. but #ubuntu was mum on the issue.21:47
lifelessI suggest reading up on disk tuning - DMA etc. Could be that.21:52
etheretichdparm?21:54
etheretictimings look ok.21:58
etheretic580/46 cached/buffered. nothing spectacular, but not abysmal either.22:01
sfwDoes anyone know how does kernel module loading in Ubuntu work? Is it any different from Gentoo? This is NOT a troll question or something. For example I try to switch cpu into ondemand mode and it explicitly requires I modprobe "powernow-k8". How does Ubuntu handle this? Im just learning a bit.22:20
mjg59sfw: Which requires it? Ubuntu or Gentoo?22:23
mjg59There's no modaliases for CPUs, so it's always necessary to explicitly load cpufreq modules22:24
mjg59Ubuntu (and most sane distributions) have a startup script that looks at your cpu vendor, family and flags and uses that to figure out which module to load22:24
sfwmjg59: So ubuntu does not use kerneld and uses kernel autoloader? What startupscript are you refering for please, init in initramfs?22:25
mjg59sfw: kerneld?22:26
mjg59It's been a while since I checked exactly how it works in Ubuntu - I /believe/ that it's called /etc/init.d/powernow.something22:26
sfwI remember pretty good I wasnt required to modprobe powernow with 10.04. It was already somehow loaded.22:26
sfwKerneld is from here: http://tldp.org/HOWTO/Kerneld/introduction.html    And I got info about it from here:http://tldp.org/HOWTO/Module-HOWTO/index.html22:27
Nafallolikely /etc/init.d/ondemand I think22:29
sfwmjg59, so ubuntu probably uses init.d to automatically load the module. Hm. I just wonder if a program can force kernel module be loaded automatically. In the case of devices its done by udev AFAIK22:29
Nafallohmm. no. that doesn't actually load modules22:29
sfwI mean it detects devices and issues modload.22:29
mjg59sfw: kerneld doesn't exist in modern kernels22:31
Nafalloah. looks like the powernow stuff is compiled into the kernel, and then /etc/init.d/ondemand sets the ondemand for cpus that supports it.22:31
sfwmjg59: this is what I was fearing)22:31
mjg59sfw: In the modern world, when a device is created it generates a uevent. That gets picked up by udev, which reads the modalias file and asks modprobe to load any modules with a modalias that matches the device's. CPUs are system devices and don't have modaliases.22:32
sfwNafallo: Ok, that pretty clears things up, ty22:32
sfwmjg59: Thanks a lot for explanation! So software usually should not load or ask to load any kernel modules?22:34
melkorare there any maverick kernels that have fixed this issue?  http://www.h-online.com/open/news/item/Hole-in-Linux-kernel-provides-root-rights-1081317.html23:53
melkorI'm using the lts maverick backports and it is not fixed.23:53

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