/srv/irclogs.ubuntu.com/2007/04/30/#ubuntu-kernel.txt

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`sam`where do i get the 2.6.21 kernel?01:03
Nafallogutsy01:04
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Asad2005I have a multi port serial card that is always detected well (all ports) in kernel 2.6.15 but other kernel only detects few of the ports, I want to know what makes kernel 2.6.15 different that i can add to other kernels as a module or a patch12:17
fabbioneAsad2005: define other kernels?12:18
Asad2005fabbione, before 2.6.15 and later ones12:19
cjwatsonpkl_: did you get anywhere with tracking down what was going wrong on 256MB systems (the apparent memory pressure thing)?12:19
Asad2005fabbione, But all are 2.612:19
cjwatsonI've had a report of a hardlock when starting the installer, and we have regularly reproducible hardlocks on PS3 under some circumstances12:19
fabbioneAsad2005: from vanilla or from ubuntu?12:19
cjwatsonthe way that userspace memory use wasn't obviously going up in Scott's tests suggests that it could be a kernel memory leak?12:20
Asad2005fabbione, ubuntu kernels but i think its not ubuntu its the linux kernel that have this different12:20
fabbioneAsad2005: i recall patching dapper specifically to init more than 4 ports12:21
fabbioneAsad2005: there is either a module option or a value you need to change in the code to init more12:21
fabbioneAsad2005: before .15 the default was 4812:21
fabbionebut it sucks memory.. 12:21
Asad2005fabbione, i tried at least one other debian based distro with 2.6.15 and worked fine12:21
fabbioneand it might be that edgy or feisty lost the patch12:21
fabbione.15 is ok... you are telling me that others are not.. so it might be the patch has been lost by mistake12:22
fabbioneAsad2005: [  107.317850]  Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled12:22
fabbionecheck this line in dmesg12:22
fabbione4 ports is the pre-allocated number12:23
fabbioneyou will see in .15 it's 4812:23
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Asad2005fabbione, where can i get this patch and how to apply it to edgy/feisty12:24
fabbioneAsad2005: it's in git tree on kernel.org12:24
Asad2005fabbione, I am a newbi so could you help more, is it a module what modprobe name to use to add it or if it is a patch how can i apply it12:26
fabbioneAsad2005: sorry i don't have time to coach on kernel hacking. The patch is in git.. there are a lot of tutorials around you can use for that. including wiki.ubuntu.com/Kernel*12:27
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pkl_cjwatson: I was in the middle of doing the preparatory work (get squashfs dumps and writing the analysis tool), but BenC wanted me to concentrate on getting a Feisty SRU out.12:39
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pkl_cjwatson: SO, I've done nothing since last Tuesday on it.  But it is definately something I want to do when I get time.  Probably after the SRU and UDS.12:40
cjwatsonok12:41
cjwatsonif it turns out to be relatively simple, I'd like to have it in the first feisty point release12:41
cjwatson(since it prevents installation)12:41
cjwatsonbut I agree the first SRU is more important than what may be a wild goose chase ...12:41
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pkl_cjwatson: yes, I'd like to at least track the cause down.  Once we know what is happening, decisions can be made as its seriousness.  What worries me at the moment is not knowing if it is serious or not.12:43
cjwatsonindeed12:44
cjwatsonand not knowing where it is and whether it might affect ordinary systems12:45
cjwatsonI was wondering if it would be worth trying to mount a squashfs on a non-live system and play about with it there, in case it's easier to debug when the root filesystem isn't involved12:45
cjwatson(or if you've already tried that)12:46
pkl_I've done some tests on a non-live system, and got some Squashfs dumps.  From an initial analysis everything is working as expected WRT Squashfs and disk I/O.  But, this is a manual eyeball of the raw data, much more meaningful information will be available once I've written the analysis tool.12:48
pkl_My plan was to write the analysis tool, play around with non-live Squashfs filesystems to check the tool was giving useful information.  Later if, neceessary, generate liveCDs with the instrumented Squashfs module, and get dumps from there.12:49
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jordiRSomebody knows what is this new package named linux-ubuntu-modules?01:09
cjwatsonjordiR: you don't need to ask; just see the package description01:13
cjwatsonand/or look at its contents01:14
jordiRcjwatson: the description only says that it contains modules supplied by Ubuntu01:15
NafallojordiR: there you go then :-)01:15
cjwatsonthe package contents will make it pretty clear which modules01:15
jordiRand I want to know what contains before install it, that is why I ask01:16
cjwatsonit's just split out from the old linux-image packages01:17
cjwatsonit's nothing you don't already have if you're running Ubuntu01:17
jordiRcan I see package contents without install it?01:17
cjwatsondownload the .deb by hand and use dpkg -c01:17
jordiRcjwatson: ok, thank you01:17
Amaranthif it's not in linux-restricted-modules and not in mainline it's in linux-ubuntu-modules01:18
Amaranthi think :)01:18
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zulBenC: around how do you a git pull/merge?01:32
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cjwatsonjordiR: oh, also, see ubuntu-devel-announce, where the linux-ubuntu-modules package was described recently01:58
jordiRcjwatson: thanks, there is the explanation I was searching for.02:13
Amaranth"the following week is UDS where we'll all be drinking the night away in some spanish saloon, maybe dodging bulls in our spare time."02:15
Amaranthsounds fun, count me in ;)02:15
Mithrandirspare time at an UDS?02:20
Amaranthyeah well...02:20
Amaranthwe can dream? :)02:20
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Asad2005fabbione, I have found the git page it seems to have two files .c and .h how do i compile a module for the extra ports02:48
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jdacharyhi: looks like the vserver patch is not supported by ubuntu, or am I mistaken ?12:10
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