=== xindz`off is now known as xindz === abhijain is now known as abhishek === abhishek is now known as ajain [17:14] Hello guys [17:15] Does someone hold classes here? === ajain is now known as abhijain [17:17] yes, but there is nothing currently on the schedule [17:19] ple [17:20] ohhh [17:46] hey [17:47] Please ask your questions in #ubuntu-classroom-chat === ChanServ changed the topic of #ubuntu-classroom to: Welcome to the Ubuntu Classroom - https://wiki.ubuntu.com/Classroom || Support in #ubuntu || Upcoming Schedule: http://is.gd/8rtIi || Questions in #ubuntu-classroom-chat || Survey: http://tinyurl.com/UUDSurveyJan11 || Current Session: Q&\;A w/ Pete Graner, Kernel Engineering Manager - Instructors: pgraner [17:47] and I will paste them in here for pgraner [17:47] Logs for this session will be available at http://irclogs.ubuntu.com/2011/02/04/%23ubuntu-classroom.html following the conclusion of the session. [17:47] Please only ask kernel questions, and I will paste those for pgraner [17:48] alrighty folks, ask your kernel questions in #ubuntu-classroom-chat! [17:48] QUESTION: what is the impact on performance on the BLK removal ? [17:48] pgraner, ^ [17:49] UndiFineD, should be a positive impact, and will make things more maintainable long term [17:49] UndiFineD, will be more noticeable on multi-core boxes [17:50] next [17:51] QUESTION: Does Ubuntu server have certain tweaks applied to its kernel vs desktop [17:51] kim0, the only real tweaks are a few config settings and the increase on the number of CPUs the kernel supports [17:52] kim0, and the default IO scheduler is Deadline [17:52] next [17:53] question: why does the performance of ubuntu (10.10) reduce a fair bit when under heavy hdd load? is there work being done to improve this? (it could just be my hardware of course..) [17:54] OkDucky, the IO Scheduler for 2.6.38 has been revamped so you should start to see better performance [17:54] next [17:54] Question : How exactly does the glorified 200 lines kernel patch will benefit in 11.04 [17:56] pgraner, ^ [17:56] Taek, That is the auto cgroup stuff, isolate session tasks, it helps balance the load and will help increase performance [17:56] jono, sorry takes a bit to type this [17:56] :-) [17:57] Tach, bottom line is you will see a benefit on heavy IO [17:57] next [17:57] Question: What about btrfs? When is it going to be in a usable situation fit for default install? [17:58] m4n1sh, Post 11.04 we are expecting it to shore up to be a default, right now its in the installer but you have to manually select it [17:58] next [17:58] QUESTION: What are the main features of the next kernel? [17:59] jono, look at kernelnewbies.org for the 2.6.38 kernel, way to many to list here [17:59] next [17:59] QUESTION: Any improvements with btrfs performance? [17:59] sebsebseb, also look at the A2 release notes some more info there as well [18:00] Jay-Cee, file deletion is noticeable, but as with any dev system things are in flux [18:01] s/noticeable/noticeably faster/ [18:01] next [18:01] QUESTION: will there be any fixes with the issues with input of some joysticks being detected as mouse input. An example of such an issue is here: https://bugs.launchpad.net/ubuntu/+source/hal/+bug/421812 [18:02] Tach, not sure this is an edev issue with X, not kernel per se [18:02] next [18:03] Question: Lennart posted a 2 line solution for the glorified 200 lines patch for kernel. Was Lennart's solution better than that of kernel? [18:04] m4n1sh, Lennart's solution had a limited use case and was not general purpose unfortunately [18:04] next [18:04] Question: I heard that installing ubuntu using btrfs as FS takes some hours to install. Is it true? Any special reason for this problem (provided it is true) [18:05] m4n1sh, that used to be the case, more recent versions of the kernel have fixed that specific issue afaik [18:05] next [18:06] QUESTION: How does the server's kernel compare to other enterprise distros' kernels , i.e. does the team regularly sync drivers for Enterprise grade cards (SAS, NICs, LOMs...) [18:07] kim0, So this is a multipart answer so bear with me while I type it out [18:07] We have a pkg call LBM that get updates on a few drivers (LBM == Linux Backport Modules) [18:08] We also have for LTS releases backported kernels that have the latest in upstream hardware enablement [18:09] the kernels are call LTS Backport Kernels and are basically the latest release kernel running on the last LTS [18:09] Keep in mind this is NOT A DESKTOP feature [18:09] it is only supported on the server flavor [18:09] so yes we have some level between the two to refresh drivers for servers [18:09] next [18:10] Question: The problems with suspend/resume/hibernate lies in which part of the kernel? Is the situation improving? [18:11] m4n1sh, the issue isn't really with the kernel, it lies with the system BIOS, most are broken, specifically within the ACPI portion of the BIOS. [18:11] we have a tool call fwts (in universe) that will test your bios and tell you what is broken [18:11] run that if you are having issues then attach the out put when you file a bug [18:12] it will help us determine if its a true kernel issue (rare) or a broken BIOS [18:12] next [18:12] QUESTION: What should you do if a kernel bug makes ubuntu unstable for a target machine? downgrade kernel or downgrade os? [18:12] doctormo, downgrade the kernel, way easier [18:13] next [18:13] QUESTION: Is there plans or even talk about having a system update without having to restart or install third party software such as ksplice. [18:14] Taek, the kernel will support kplice however we have no plans to do such a thing, there is already a commercial venture [18:14] that does that [18:14] next [18:15] QUESTION: Do you think that Ubuntu Desktop might use Ksplice in the future? [18:15] sebsebseb, No as stated in the last question [18:15] next [18:15] QUESTION: Is there any plan to help move packages from module-assistant to dkms in debian/ubuntu? [18:16] doctormo, no there are no plans to do so, dkms is our preferred method for out of tree drivers [18:16] next [18:16] QUESTION : There are wirless modems (wireless broadband data cards) and TV tuner cards, which do not get detected by Ubuntu at all. What can I expect in 11.04 in this respect. [18:17] GauravButola, depending on the device there are several reasons why it may or may not be supported in Ubuntu [18:17] the biggest reason is that the firmware is not available or there is not a driver [18:18] if the firmware is available and we don't have it file a bug and we will see what we can do to get it into the distro [18:18] as far as what to expect, there is better support based on bugs and user feedback. [18:18] next [18:18] QUESTION: Does hard coding usb and pci ids into the kernel driver code make enabeling hardware that would work, but for a new id, more difficult? [18:20] doctormo, It is harder but its the only way we have right now, device tree should fix this problem in the future but its not ready for prime time on X86 [18:20] next [18:20] QUESTION: I don't really know much about USB 3.0, but when is Ubuntu likely to support it? [18:21] sebsebseb, it entered the kernel in 2.6.35 iirc and has been in ubuntu [18:22] sebsebseb, older ubuntu kernels will get support as it bubbles into the stable tree from upstream [18:22] next [18:22] QUESTION: Are there any automated kernel speed tests happening in order to improve perforance in the kernel? [18:23] doctormo, not currently, there are plans but that is more of a QA question (hint ask marjo on his turn) [18:23] however there are other doing it [18:23] next [18:23] QUESTION: Do you think Ubuntu 11.10 will use BTRFS by default, if so why? [18:24] that was the last question - any final questions? ask them in #ubuntu-classroom-chat !! [18:24] sebsebseb, at this point we have no idea, that will be determined based on stability at UDS [18:24] next [18:24] ok, we are all out [18:25] Great thanks everyone! [18:25] if there are no more questions in the next minute or so, we will wrap up [18:25] Hope it was helpful [18:25] OK, it's a wrap! [18:25] thanks everyone, and thanks pgraner for taking the time today :-) [18:25] Thanks I'm out! [18:40] There are 10 minutes remaining in the current session. [18:41] There are 5 minutes remaining in the current session. === ChanServ changed the topic of #ubuntu-classroom to: Welcome to the Ubuntu Classroom - https://wiki.ubuntu.com/Classroom || Support in #ubuntu || Upcoming Schedule: http://is.gd/8rtIi || Questions in #ubuntu-classroom-chat || Survey: http://tinyurl.com/UUDSurveyJan11 || === michael is now known as Guest1245