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Thread: What is kworker?

  1. #1
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    Question What is kworker?

    I've started seeing something called "kworker" listed recently when I run top. There is no man page for it, and there seems to be no documentation at all. Searching Google didn't help.

    Even odder, it regularly makes the top ten resources consumer in top, but it doesn't seem to be using any resources:

    26 root 20 0 0 0 0 R 0 0.0 7:08.58 kworker/1:1
    What's it for, what does it do, and is there any documentation?
    Last edited by klausner; November 25th, 2010 at 09:08 AM.

  2. #2
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    Re: What is kworker?

    Bump.

  3. #3
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    Re: What is kworker?

    I was really hoping someone would answer this thread because I spent quite a while looking. You're right. There's not a lot of info out there. I see people affected with an Intel video card or a mouse, so it would seem like it has something to do with interrupts but I'm not sure. I even went to Bing and wikipedia as a last resort. It didn't help. Here's what I found in case you didn't. It's not much help.

    &

    http://koppermind.homelinux.org/kwor...hp?selection=a

    http://forums.gentoo.org/viewtopic-t...851dade0c06da0

    https://bugzilla.kernel.org/show_bug.cgi?id=20232

    http://aptosid.com/index.php?name=PN...3f16dc397b6db9

  4. #4
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    Re: What is kworker?

    Bump

  5. #5
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    Ubuntu Development Release

    Re: What is kworker?

    I'm having trouble with this as well. Running natty, so using 2.6.27-8 x86_64.

    It seems alleviated by running
    Code:
    echo disable > /sys/firmware/acpi/interrupts/gpe01
    Source.

  6. #6
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    Re: What is kworker?

    Bump.

  7. #7
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    Re: What is kworker?

    Kworker is what controls the ACPI wakeup signals from the BIOS.

    The latest kernel, well all of them since 2.6.35 have had issues with too many wakeups.

    This is an issue across ALL linux distributions.

    Hopefully it's going to be fixed in kernel 2.6.35.

    The current snapshot is: 2.6.37-rc7-git3 so it shouldn't be too long.

  8. #8
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    Re: What is kworker?

    Quote Originally Posted by llawwehttam View Post
    Kworker is what controls the ACPI wakeup signals from the BIOS.

    The latest kernel, well all of them since 2.6.35 have had issues with too many wakeups.

    This is an issue across ALL linux distributions.

    Hopefully it's going to be fixed in kernel 2.6.35.

    The current snapshot is: 2.6.37-rc7-git3 so it shouldn't be too long.
    Thank you for the description. Do you know where this is documentation on this, and other mystery tasks like the "migration" process?

  9. #9
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    Re: What is kworker?

    I'm using Arch with kernel 2.6.36-ARCH, and I have seven kworker processes.

    Is this better or worse than your situation?
    http://xkcd.com/293/
    There are 10 kinds of people in this world: Those who understand ternary, those who don't, and those who confuse it with binary.

  10. #10
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    Re: What is kworker?

    Quote Originally Posted by WorMzy View Post
    I'm using Arch with kernel 2.6.36-ARCH, and I have seven kworker processes.

    Is this better or worse than your situation?
    I have eight right now. Not sure what that signifies.

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