Results 1 to 4 of 4

Thread: Hibernation, Intel I/OAT and defective dma_v3.c

  1. #1

    Default Hibernation, Intel I/OAT and defective dma_v3.c

    With opensuse 13.1, my computer could not hibernate. Could with 12.3.

    After long debugging attempts, I saw a message about kernel bug in file
    /usr/src/linux-3.11.6-4/drivers/dma/ioat/dma_v3.c, line 768.

    The author and copyright holder of the file might be Intel. It is interesting that in the directory /usr/src/linux-3.11.6-4/drivers/dma/ioat/, a few previous versions of the file are present. But I don't know how to activate them instead of v3.

    Switching to kernel 3.12.5 did not help.


    ioat stands for I/OAT = Intel's input-output acceleration technology = some sort of hardware DMA engine which unloads the CPU. It is used in high-end server motherboards, according to Wikipedia. However, my motherboard, which is not high-end, had a setting about I/OAT. So I disabled it, and hibernation worked! (But haven't tested thoroughly.)

    There is no effect on computer's working speed that I can see. An article states that actual investigations show a small effect only in high-speed network operations.

  2. #2
    Join Date
    Jun 2008
    Location
    Groningen, Netherlands
    Posts
    20,925
    Blog Entries
    14

    Default Re: Hibernation, Intel I/OAT and defective dma_v3.c

    Thanks for sharing, nice you've got it solved. IIRC you created another thread, please add your findings there too.
    ° Appreciate my reply? Click the star and let me know why.

    ° Perfection is not gonna happen. No way.

    http://en.opensuse.org/User:Knurpht
    http://nl.opensuse.org/Gebruiker:Knurpht

  3. #3
    Join Date
    Feb 2009
    Location
    Spain
    Posts
    25,547

    Default Re: Hibernation, Intel I/OAT and defective dma_v3.c

    On 2013-12-16 12:56, ZStefan wrote:
    >
    > With opensuse 13.1, my computer could not hibernate. Could with 12.3.
    >
    > After long debugging attempts, I saw a message about kernel bug in file
    > /usr/src/linux-3.11.6-4/drivers/dma/ioat/dma_v3.c, line 768.


    Please report in bugzilla.

    openSUSE:Submitting bug
    reports


    --
    Cheers / Saludos,

    Carlos E. R.
    (from 12.3 x86_64 "Dartmouth" at Telcontar)

  4. #4

    Default Reported on bugzilla

    Reported on bugzilla, # 855713.

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •