/srv/irclogs.ubuntu.com/2013/05/02/#ubuntu+1.txt

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susundberguhh, my 3.8.X kernels do not boot, instead they give me kernel panic07:25
susundbergor no panic but stackdump + no boot07:25
susundbergAny hints how to get the text that i see on the screen to a file so i can search the issue?07:26
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BluesKajHiyas all11:42
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susundbergHi12:19
susundbergBluesKaj: can you spare me a moment? My 13.04 kernel 3.8.X is segfaulting on every boot but 3.5.X works fine, i should check what is wrong but taking photo from the display sounds stupid, any suggestions? I have checked kernel.log but its not there (as it hapens on the boot i guess .. )12:24
k1lsusundberg: since 13.04 is released you should ask in #ubuntu12:25
BluesKajsusundberg, if it's segfaulting then it's difficult to know what's breaking , best to purge the 3.8 kernel and use the 3.512:28
susundbergk1l: yeah i guess, but the question how to get kernel dump to a text file is  not really release related anyhow ..12:28
susundbergBluesKaj: thanks12:28
susundbergI kind of though to file report but i am not going to take photos of the screen ;)12:29
k1lsusundberg: so you should prefere the main channel. yes.12:29
=== ChanServ changed the topic of #ubuntu+1 to: Welcome to #ubuntu+1, the channel for discussion of pre-release versions of Ubuntu. | 13.04 has been released!! http://www.ubuntu.com/getubuntu/releasenotes | https://wiki.ubuntu.com/SaucySalamander/ReleaseSchedule
johnjohn101have saucy installed as vmware machine.  kernel 3.9 very nice15:49
johnjohn101do you think .10 or .11 will be the released kernel?15:56
Anca-Emanueljohnjohn101: 3.10.x    look at https://wiki.ubuntu.com/SaucySalamander/ReleaseSchedule  Aug 15: 12.04.316:09
lordievaderGood evening.18:04
bekksAnca-Emanuel: Where do you see 3.10.x there?18:13
bekksThe kernel freeze happens on October, 3rd18:13
Anca-Emanuelbekks: kernel 3.10 will take at least 60 days to develop. That will be july.18:22
Anca-Emanuelbekks: then they need something to deliver for the hardware enablement stack for LTS 12.04.318:24
johnjohn101so will 12.04.03 have the 3.10 kernel?18:26
bekksAnca-Emanuel: And? 60 days after end of July we will be at 3.11 possible - end of september :)18:27
alankilahmm... They aren't supposed to update the kernel version in the stable series?18:27
bekksAnca-Emanuel: So its not that clear which kernel version will be used, isnt it?18:27
alankilaAh, I see a precise-updates option for a newer kernel than 3.218:28
Anca-Emanueljohnjojn101: 12.04.1 have 3.5 kernel;  12.04.2 have 3.8 kernel from raring... guess18:28
johnjohn101i have the 3.5 kernel on 12.04.whatever now18:28
lordievaderAnca-Emanuel: 12.04.2 is already release, should have the 3.5 kernel.18:29
BluesKajfor a simple quick check of system activity, ctrl+esc18:51
johnjohn101are we getting gcc 4.8?19:09
jtaylorits already in19:11
johnjohn101woot, was going to try to slam it into 12.04 but didn't get around to it, now i have a chance to test!!19:13
alankilais there a metapackage for getting all the updated packages at once?19:14
alankilafor instance the kernel won't update by default, apparently19:14
vibhavgcc 4.8 is in19:19
johnjohn101is it bad that when ever i share folders between two ubuntu machines, i use samba to do it?19:21
alankilano, I'd use samba in every case. It seems to be the most productized solution.19:22
alankilameaning you can basically right click on a folder icon and get it to work, maybe, without having to puzzle out anything much19:22
alankilajust like windows I guess19:22
johnjohn101yeah,  windows solution for ubuntu19:22
alankilathough some people seem to dislike it when something ordinarily complex becomes rather easy.19:23
johnjohn101doesn't seem right.  yeah, i click share on one folder and then use connect to server on another machine and voila, ez file transfer19:23
johnjohn101well it's from the windows world and not the linux world.19:24
alankilaI had more trouble getting file sharing to work on windows today... mostly because it's a locked down windows machine and the GUI didn't work, but "net use t: \\blahblah\blaa /permsistent:yes /user:blaa" did19:24
johnjohn101i still use net use and my coworkers say i'm too old fashioned19:25
yofelalankila: kernel should update automatically as long as you have linux-image-generic installed19:27
* yofel runs 3.9.0-019:27
alankilayofel: it doesn't acquire the precise-update, only new kernels from precise I think...19:28
yofeloh, you were talking about precise...19:28
alankilaAnyway it doesn't actually matter to me in practice19:29
johnjohn101kernel updates seems really only necessary for hardware19:31
alankilayeah these are virtual systems19:32
alankilaI'm keen on getting new kernel versions because I run btrfs. Risky as hell though I haven't lost data yet and I have terabytes on it. but I'm about to start using it on a server with customer data, which means I'm going to do backups extra carefully.19:32
bjsnideralankila, as long as you do snapshots and have some unused space and whatnot you're ok19:38
alankilayeh that's what I think19:39
alankilathough I do wonder about my sanity. Still, the experience with btrfs has been positive so far and I've used it on a backups volume due to the snapshot capability for long time19:40
johnjohn101you should post your findings somewhere and share the knowledge19:45
alankilalong being over a year, but still there's generally some 10 GB of new stuff going in every day and snapshots are kept from days to 1 month with roughly exponential backoff in how the old snapshots get deleted19:46
alankilaI think you could easily torture btrfs for a few days for similar level of exercise of the filesystem, so my accumulated experience is not very valuable19:47
alankilaplus properly constructed test would be able to validate that the filesystem has kept the data correctly.19:50
alankilathe fact I have a backup volume that appears to hold files but which I basically never need means it's not exactly a convincing demonstration of the filesystem's stability. But it has run actual virtual machines for months too and without any issues19:51
alankilathese virtual machines would crash on data corruption pretty soon19:51
johnjohn101yeah, good luck with all that20:02
alankilathough only 3.8 kernel provided reasonable performance for VM disk images20:02
alankilabtrfs is attractive in many ways in that it provides atomic snapshots that allow continued writing ... just such a pain in the ass with the risk that it might crash or corrupt itself somehow20:03
alankilathe feature set is not bad, and it's right in the kernel, and works with everything.20:03
alankilalike grub. Better than xfs even. You are always playing with fire if your /boot is on XFS for instance. If you reboot too quick after a new kernel, there's stuff in journal which grub isn't capable of reading20:04
alankilaand I dare not even try ZFS for the time being20:04
johnjohn101i would love to see an article about zfs on ubuntu20:05
alankilaThe reason why I mention XFS is that it's another serious contender for a VM host because it has supported a version of hole punch ioctl for a long time. It used to be completely XFS-specific but it allows fstrim on guest to free image range on the host side20:05
johnjohn101not even sure what that means.20:05
alankilait means VM disk images can be say 100 GB large but only consume like 1 GB of space. If you do a lot of stuff like touch a lot of disk blocks, they grow, even if the real data contained on the guest FS is still 1 GB20:07
alankilawith support for fstrim and filesystem capable of hole-punching, that space can be freed.20:07
johnjohn101only used when its used20:08
alankilaI went from 10 GB disk images to 2 GB disk images when I trimmed them20:08
alankilafor instance loop mount can be performed on the raw disk image and fstrim can be performed on the loop mount nowadays20:08
alankilait will be translated by the kernel's loopback mount driver to hole punch ioctls20:09
alankilaqemu 1.4 users can enjoy ata trim support on the IDE driver20:09
alankilaenabling the trim was difficult though, because it requires passing a parameter discard_granularity=512 to the IDE device description and libvirt doesn't currently support this parameter, so passing it was difficult. I ended up writing a shell wrapper that notices the -device argument and appends it when ide-disk is being defined20:12
alankilait wasn't pretty but whatever20:12
alankilaannoyingly, the libvirt people even validate that the paramters used in the domain xml specifications can be interpreted correctly by the invoked qemu so they forbid using a comma as value inside. I tried many hacks. For once, someone had engineered this competently.20:13
alankilaI almost quit using libvirt that day and I keep on thinking maybe I should have thrown it to the river. All it really does is start my VMs at boot and stop them at shutdown. That's not a whole lot of useful work, but I hate writing init.d scripts20:14
hachrewho is running saucy yet ;D20:15
johnjohn101i have it20:17
hachreis it useable?20:17
hachreim installing it right now20:17
johnjohn101so far so good. doesn't look like much has changed since 13.04.  3.9 kernel/ gcc 4.8 is all i know about20:18
Anca-EmanuelThere is any Ubuntu developers here ? Do you plan to support f2fs ? http://ubuntuforums.org/showthread.php?t=2137837&page=220:18
hachreya thought so20:18
johnjohn101don't worry, they'll figure out how to break something!20:19
hachreAnca-Emanuel: usually if its in debian its gonna be in ubuntu20:19
hachreAnca-Emanuel: if you want something in ubuntu the best way is to get it into debian20:20
johnjohn101what file system is that for?20:21
hachrenew filesystem for smartphone flash the way it looks to me20:21
johnjohn101right for samsung fones20:23
johnjohn101wondering if perl 5.16 will be the default perl20:24
Anca-Emanueljohnjohn101: f2fs is for flash based memory devices. Early benchmarks: http://www.phoronix.com/scan.php?page=article&item=linux_f2fs_usb3&num=120:26
jtaylorisn't that in the kernel?20:28
jtayloror not yet?20:28
johnjohn101http://www.phoronix.com/scan.php?page=news_item&px=MTMxMTU20:29
johnjohn101looks like 3.9 kernel20:30
jtaylorthen itll be in saucy20:30
jtaylormaybe already is20:30
johnjohn101or you have to update kernel in raring20:30
Anca-Emanueljtaylor: what ? f2fs ? yes it is included in kernel, you can read the docs here: https://github.com/torvalds/linux/blob/master/Documentation/filesystems/f2fs.txt20:34
Anca-Emanuelhachre: http://cards.linaro.org/browse/CARD-277  sent mail to linaro-dev and Wook Wookey (debian bootstrap expert for arm64)21:27
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