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Linux Kernel 2.6.29 Released

diegocgteleline.es writes "Linus Torvalds has released Linux 2.6.29. The new features include the inclusion of kernel graphic modesetting, WiMAX, access point Wi-Fi support, inclusion of squashfs and a preliminary version of btrfs, a more scalable version of RCU, eCryptfs filename encryption, ext4 no journal mode, OCFS2 metadata checksums, improvements to the memory controller, support for filesystem freeze, and other features. Here is the full list of changes."

34 of 265 comments (clear)

  1. Kernel Graphics Molesting by bluefoxlucid · · Score: 4, Funny

    I totally misread that.

  2. Re:Access Point Wi-Fi? by swimin · · Score: 5, Informative

    Ummm I'm pretty sure thats the ability to act as a wifi access point, which windows can't do yet.

  3. The most important missed out feature by LingNoi · · Score: 5, Informative

    I can't believe this wasn't mentioned..

    The most obvious change is the (temporary) change of logo to Tuz, the Tasmanian Devil.

    Here's what the new linux logo looks like for this release.

    1. Re:The most important missed out feature by slash.duncan · · Score: 5, Informative

      I am impressed that Torvalds knows about this issue, and credo to him for raising people's awareness.

      There's rather more community history behind it than that. The below is from memory based on various coverage I read on LWN and the like, but not fact-checked to be positive my memory is correct, so verify before acting on it as fact.

      I believe it was at the annual linux.conf.au, tho I'm not sure but it was some such conference, widely attended by Linux kernel hackers, that the presentation was made. There was apparently a fairly big charity pledge drive related to the issue, with many of the kernel hackers taking part. Various ones of them, in addition to pledging their own money, pledged various acts should the conference pledge drive reach whatever goal ($10K, maybe?).

      Well, the pledge drive was quite a success, and the various hackers either have or are in the process of fulfilling their various promises as a result. One of the ones that made Linux hacker community (and LWN) headlines was Bdale Garbee's pledge, to shave his beard. He hadn't been beardless in, I think, well over a decade (15 years? longer?). There was an LWN article on it with a photo (taken I believe at the closing ceremony or traditional post-conference party) of Linus as barber, doing the honors! =:^)

      That's actually how I first heard about the whole thing, seeing that photo and reading the accompanying article. But apparently Linus' own pledge was to name a kernel version after the Tazmanian Devil. But he has actually gone one better, changing the logo for .29 as well as the name.

      This logo, BTW, is the one the kernel framebuffer driver optionally displays at the top of the screen during boot, if the framebuffer is activated and the config option set to do so. There's a single logo displayed for every CPU/core, so my dual dual-core Opteron displays a nice row of four such logos. I can only imagine the row of 32 of the things on say a quad-socket oct-core machine. =:^)

      Anyway, I've been running a kernel compiled directly from git for a few months now (switching to the stable series between release and rc2 or so, only running mainline git between rc2 and release), and am currently running:

      $uname -r
      2.6.29-rc8-223-ga1e4ee2

      So I've had the pleasure of seeing four of these little beasties at boot for a week or so, now. =:^)

      Anyway, it's not just Linus. It's the entire kernel hacker community that got involved, thanks to linux.conf.au. =:^)

      All that said, while I obviously knew more about the Linux/kernel community side of things and had a bit of general awareness from that, I hadn't bothered reading up on the disease itself until taking the opportunity to click that nice wikipedia link you so thoughtfully provided. Now I know a bit more about it, and am hopefully returning the favor with the above info on the Linux community side of things.

      OK, I did an LWN search and here's some relevant links, so folks can fact-check what I wrote above, as well as quote something more authoritative than just some /. post.

      LWN 2.6.29 kernel announcement (mentions the code name):
      http://lwn.net/Articles/325047/

      That points to Linus' actual announcement (LKML announcement as seen on LWN):
      http://lwn.net/Articles/325048/

      The kernel gets a new logo (a comment links the actual git commit by Rusty Russel):
      http://lwn.net/Articles/323966/

      Beardless Bdale (It'd be interesting to see the stats for this one as related to the Linus in a swimsuit one, I think also linux.conf.au from a few years ago, dunk tank FWIW, see below.)
      http://lwn.net/Articles/316282/

      (FWIW, LCA/linux.conf.au, correct. AU$35-40K raised according to "beardless". With the awareness brought by 2.6.29 related publicity, hopefully much more

      --
      Duncan
      "Every nonfree program has a lord, a master,
      and if you use the program, he is your master."
      R Stallman
    2. Re:The most important missed out feature by fuzzyfuzzyfungus · · Score: 3, Insightful

      Starving girls with swollen bellies aren't on the edge of extinction.

  4. Filesystems in the kernel! by DrSkwid · · Score: 4, Funny

    Filesystems in the kernel, savages!

    --
    There are places where the networks are not touching,and there are places where they are-Boeing's Lori Gunter
    1. Re:Filesystems in the kernel! by MichaelSmith · · Score: 4, Insightful

      Filesystems in the kernel, savages!

      Give it five to ten years. Linus will have to move all that bloat out of the kernel. I wonder if he will start again from minix 3?

    2. Re:Filesystems in the kernel! by Zan+Lynx · · Score: 5, Informative

      You only need rootfs, which is a special type of ramfs that loads the initramfs image. initramfs is loaded by the bootloader, so probably GRUB or LILO or ELILO.

      Then if every other filesystem was based on FUSE, you would load the initramfs with the FUSE module, the FUSE setup programs and a config file.

    3. Re:Filesystems in the kernel! by Nicopa · · Score: 5, Informative

      It doesn't work like that. The kernel never uses its own filesystems' support to load itself... How could it if it hasn't been loaded yet? That's the job of a "boot loader". The most user boot loader currently is Grub, and previously was Lilo.

      Grub supports some filesystems, so it can access them and load the kernel. Lilo did not support filesystem, so there was a tool that you needed to run each time you changed the kernel. That tool built a list of blocks, so that Lilo could load the kernel (from those blocks) without really understanding the filesystem.

    4. Re:Filesystems in the kernel! by visualight · · Score: 4, Insightful

      Not everyone wants an initrd/initramfs to be 'required' to boot. Options, always preserve your options.

      --
      Samsung took back my unlocked bootloader because Google wants me to rent movies. They're both evil.
    5. Re:Filesystems in the kernel! by hydrofi · · Score: 5, Informative

      Then if every other filesystem was based on FUSE, you would load the initramfs with the FUSE module, the FUSE setup programs and a config file.

      Actually, user space filesystems are nice, but they are way too slow for implementing a high speed server and/or even a decent desktop machine. They are good for experiments and pioneering work though (like GMailFS and SSHFS), but having a good set of fast, basic filesystems in the kernel is just obligatory AFAIK.

    6. Re:Filesystems in the kernel! by ultranova · · Score: 3, Insightful

      Actually, user space filesystems are nice, but they are way too slow for implementing a high speed server and/or even a decent desktop machine.

      A database management system is nothing but a fancy filesystem with structured files, yet they are often used in servers and perform just fine.

      --

      Forget magic. Any technology distinguishable from divine power is insufficiently advanced.

  5. Re:Access Point Wi-Fi? by edivad · · Score: 3, Informative

    Yes it is indeed. The MS funny-boy above must have missed the obvious point. But that isn't in any way a surprise, is it?

  6. Dataloss under Ext4: Obama to blame. by spaceturtle · · Score: 5, Funny

    Further investigation into the cause of dataloss under the Ext4 Filesystem has revealed that it is not the fault of Application Developers, Ext4, nor even the evil POSIX manual of Doom. Its turns out that it Obama is so corrupt that he has caused major dataloss all around the nation. There! At least I'm an *on topic* Troll. Was that so hard?

    1. Re:Dataloss under Ext4: Obama to blame. by Cassini2 · · Score: 3, Insightful

      After the Ext4 dataloss discussion, and the "Don't fear the fsync()" posts, I don't want to hear about Ext4, fsync(), or data loss again.

  7. New mascot (this kernel only) by bucketoftruth · · Score: 4, Informative

    The most important feature is the new mascot, Tuz. FTFA:
    As everybody knows, only important fixes will be merged into the mainline kernel at this late stage of the development cycle. One of the fixes merged by Linus on March 17 was a high-resolution SVG image of "Tuz," the mascot of the 2009 linux.conf.au conference. Tuz, in his new home at Documentation/logo.svg, serves to remind the world of the difficulties faced by the Tasmanian devil and how the linux.conf.au attendees supported the effort to save this species from extinction.

    1. Re:New mascot (this kernel only) by k-macjapan · · Score: 5, Interesting

      Hello. I have looked into this and found the following site. http://www.tasmaniandevilpark.com/index.html

      The link to their donation form is http://www.tasmaniandevilpark.com/friends.html

      Cheers

  8. Better crypto support == goodness. by palegray.net · · Score: 4, Informative

    eCryptfs filename encryption

    Here's the eCryptfs home page for more information on this nifty addition.

  9. Oh come on, that's totally on topic! by FooAtWFU · · Score: 4, Informative

    Tuz the Tasmanian devil has replaced Tux as the kernel mascot (for this release) to raise awareness of this endangered species (which is threatened with extinction due to a scientifically interesting but horrific transmissible facial cancer.).

    --
    The World Wide Web is dying. Soon, we shall have only the Internet.
    1. Re:Oh come on, that's totally on topic! by MindlessAutomata · · Score: 3, Funny

      Looks like it's time to change into my "Tasmanian Devil with huge friggin' tumor at the mouth" costume for the "I'm Linux" competition.

  10. Yo Dawg by Danny+Rathjens · · Score: 3, Funny

    We herd you like graphic modesetting, so we included the inclusion in your kernel so you can set modes while you include.

    Sorry - "include the inclusion" just screamed out for this. :)

  11. Re:Drivers??? by Ash-Fox · · Score: 4, Informative

    Will the driver problem be fixed? I am tired of having to search for stuff if I buy a new printer or scanner etc.

    Been working for years, for me.

    I just plug in my printer, use the add printer wizard, select model, various sharing methods - no stupid driver installation that installs a bunch of bloatware.

    Plug in my tablet, works instantly - no stupid driver installation that includes tray icon background processes.

    Plug in wireless device, works instantly - no stupid driver installation that includes some special wireless manager that has a terrible UI and doesn't really work properly.

    --
    Change is certain; progress is not obligatory.
  12. Use an initrd. by spaceturtle · · Score: 5, Informative

    Even in Linux, most distro's don't have full filesystems built into the kernel. Instead they only build in a tiny in-memory fs that allows them to read an initrd. This means that they can have virtually any filesystem as a root filesystem without having to compile every conceivable filesystem into their general purpose kernel.

    It is also possible to avoid ever booting in the way Linux machines boot. Instead, the boot process could act like the hibernate/resume functionality of Linux. So instead of loading programs into the address space from a filesystem, we simply read the resulting address space from disk. After all, some embedded devices don't need to ever use a filesystem, so in these cases loading a fs would be a waste of resources.

  13. Re:Access Point Wi-Fi? by SpazmodeusG · · Score: 4, Interesting

    It uses the hostap driver on Mac - that's HOST Access Point driver, same as what's used in Linux. It creates full access point, not an ad-hoc network. It works well, you can connect to it with other devices just like you would to any other WAP.
    It isn't built into the kernel though (nothing much is on Darwin). This Linux feature they are talking about now has been around for a while. It hasn't been built into the kernel before though.

  14. Re:I have a dream..... by inKubus · · Score: 3, Funny

    Sorry dude, you have to wait for kernel 2.8 for the joy and beauty modules that will enable your desktop product to have those attributes.

    --
    Cool! Amazing Toys.
  15. Re:Drivers??? by onefriedrice · · Score: 3, Insightful

    What I find really weird is that on Windows, the default paper size is always "letter", when most people use A4.

    Not in the U.S.

    --
    This author takes full ownership and responsibility for the unpopular opinions outlined above.
  16. Re:Drivers??? by Kjella · · Score: 4, Informative

    As long as you followed step #0. Check printer compatibility here and scanner compatibility here. Unless they got a Tux logo or something, because there are still devices that don't have Linux drivers. I agree, when it works it works much better on Windows and most things work, but a two minute googling may still save you a lot of grief. Plus, there's nothing wrong with supporting manufacturers that really have first-class Linux drivers.

    --
    Live today, because you never know what tomorrow brings
  17. Re:I have a dream..... by Abreu · · Score: 5, Insightful

    [sigh]

    This again?

    For the last time, Gnome and KDE are not going to merge! And we don't want them to merge! Healthy, friendly competition is good!

    A Single-Unified-Linux-Desktop is neither desirable nor necessary for "world domination" or even "the year of the Linux Desktop"

    --
    No sig for the moment.
  18. Re:I have a dream..... by slash.duncan · · Score: 4, Interesting

    No kidding.

    I'm honestly not sure it still applies to KDE in the 4.x era, but at least in the 3.x era, the philosophies were quite different. Gnome's policy of (pseudoquote) "there's one best way to do it and we don't want to confuse the users with too many config options" was extremely frustrating for many KDE users and devs, particularly the power users that /like/ to configure the desktop until it uniquely fits them like a glove, while likewise, the KDE "if it can be configured, different people are going to want different things, so let's expose every single possible configuration option to the user in the GUI" was extremely frustrating to many Gnome users and devs, particularly those who just want it to work, damit, because they have work to do.

    The point is, forcing the devs and users who find the one policy most useful to follow the other one, surely is effective... at causing useless squabbles and getting nothing done! Keep the "there's only one true way" folks away from the "make it configurable for everyone" folks, and both types can continue to improve their product without getting in the way of each other.

    Similarly of course with all the other "Linux is too divided" debates, from too many distributions, to vi/emacs, to... whatever. It's a free community and part of the strength therein lies in the freedom. Even if it were possible to take away that freedom to create one's own product, there'd be little point, as were it to happen, we'd just end up back with the monopolistic monstrosity that is MS. One size does NOT fit all, and encouraging differentiation and innovation, certainly based on common standards, but /only/ /based/ on common standards, is a /good/ thing.

    That said, the one thing that does keep the Linux community from incompatibly splitting up much like the proprietary Unix community did is again, that it's all open and shared. Each distribution and individual app therefore has an interest not only in doing what it was created for really well, even if that splits from the community, but ALSO in following the common solution where it really doesn't matter for what it was created for, because every deviation from the common solution costs maintenance time and resources, time and resources that could otherwise be invested in bettering either the differentiating aspects further, or in advancing the common ones. In practice this dynamic ensures that individual solutions only diverge from the common where it really matters to them, because every divergence costs resources, and divergence just for the sake of it is thus less efficient and dies out relatively quickly, compared to those who focus resources on divergence only where it directly furthers their goals and on otherwise bettering the common solution, submitting patches upstream, etc. Thus, unlike the proprietary Unix solutions, divergence for the sake of divergence simply isn't efficient enough to survive, and ultimately dies. But where there's a good reason for divergence, that only serves to drive a sharper focus on bettering the different solutions that remain, driving the evolution of the community as a whole even faster.

    (Umm... (looking around) I guess it's pretty obvious that I'm a "True Believer" (tm), isn't it. Yes, I am, and for that I'm not going to apologize! =:^)

    --
    Duncan
    "Every nonfree program has a lord, a master,
    and if you use the program, he is your master."
    R Stallman
  19. Not what you are asking for but... by Sits · · Score: 5, Informative

    The Linux wireless drivers page lists which drivers support master/access point mode (see the AP column). The list isn't perfect (the hostap driver definitely supports AP mode :-) but it seems to be a case of omissions. The table also says what form factor the supported chipsets come in (so you can tell which ones you will be able to get in USB form). I'd guess the rt2500usb or p54usb drivers would be your best bet.

    Another useful page is the Linux wireless chipset directory which tries to list which cards have which chipsets (there's even a single page table with all the added chipsets but I won't link to it from here). This lets you build a list of boxes with the desired chipsets inside them (finding out whether this is true in reality can in itself can be a fraught process though). The chipset is really the important part in all of this.

    I'm not going to point to an Amazon page because I have not bought a USB wifi card with the capabilities you describe from Amazon. I'm in no position to tell you that XYZ USB device on Amazon definitely works as I haven't done it myself. I have used hostapd on Linux and OpenBSD before now on a creaky old Prism 2.5 card and that worked for me but again that's not what you asked.

    Finally here's a guide to using hostapd to set a card up in access point mode (just using iwconfig to set master mode is not enough). Googling for hostapd linux will turn up plenty more guides which may be easier to follow.

    Good luck!

  20. Re:Drivers??? by SuperAndy · · Score: 3, Interesting

    A4 isn't meant to be equal to the golden ratio. It is meant to be 1/Root2, or Root2, depending on your outlook on life. Designed such that if you stick two of them together, you get the next size up. Or on cutting one in half, get the next size down; again, depending on your outlook on life.

    http://en.wikipedia.org/wiki/Paper_size

  21. Re:Drivers??? by xouumalperxe · · Score: 4, Interesting

    The golden ratio isn't really all that useful for writing paper. The A system is based on A0 being 1 square metre, and the sides being in a sqrt(2) proportion so that each time you cut an A(n) sheet in half along the long edge, you get two A(n+1) sheets. Plus, it makes calculating letter weights really easy: given the paper weight in g/m^2, you just divide that by 2^4 = 16 for A4, 2^5 = 32 for A5, etc, then multiply by the number of sheets.

  22. KMS is Intel-only for now by ianmacfarlane · · Score: 4, Informative

    Kernel Mode Setting (KMS) is only for Intel hardware in this release. Other graphics hardware will have to wait for a later release.

  23. Re:Drivers??? by DerPflanz · · Score: 3, Informative

    The golden ratio isn't really all that useful for writing paper.

    Except that, when you have an long-side-leading A4 printer, it can also print A3, because the long side of A4 is the same as the short side of A3. It makes the printer a little more versatile.

    --
    -- The Internet is a too slow way of doing things, you'd never do without it.