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Ryzen cpu gouvernor bug when using custom p-states?

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  • #11
    Originally posted by RavFX View Post
    Fixed! (That removed CONFIG_RCU_NOCB_CPU_ALL option should be added back
    Intel kernel developers do everything to make new Amd and old intel hardware buggy and they do not react to bug reports and many bugs are unsolved for years. It looks like my Amlogic S912 arm64 tvbox is best supported by Linux, latest kernels are stable and do have silent dmesg output. Audio is not implemented yet and arm mali gpu support will be never open source.
    Last edited by debianxfce; 11-16-2017, 09:36 PM.

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    • #12
      Originally posted by debianxfce View Post

      Intel kernel developers do everything to make new Amd and old intel hardware buggy and they do not react to bug reports and many bugs are unsolved for years. It looks like my Amlogic S912 arm64 tvbox is best supported by Linux, latest kernels are stable and do have silent dmesg output. Audio is not implemented yet and arm mali gpu support will be never open source.
      OPTION CONFIG_RCU_NOCB_CPU_ALL added on May 7, 2013
      WORKAROUND for Ryzen first appeared on Google on May 11, 2017 (did not find older entry related to Ryzen)
      OPTION CONFIG_RCU_NOCB_CPU_ALL Yanked on May 25 2017 (about two week after proper workaround showed up, during Linux 4.13 merge window)

      Noise need to be made. The maintainer who deleted that option is Paul McKenney and do work at IBM.
      Here is the kernel entry : https://patchwork.kernel.org/patch/9749291/
      Last edited by RavFX; 11-16-2017, 11:27 PM.

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      • #13
        Originally posted by RavFX View Post
        Noise need to be made. The maintainer who deleted that option is Paul McKenney and do work at IBM.
        Here is the kernel entry : https://patchwork.kernel.org/patch/9749291/
        If you read the whole bug report discussion that I posted, the root cause is made by intel developers:
        https://git.kernel.org/pub/scm/linux...08c5dff757e547


        "
        Signed-off-by: Aaron Lu <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Huang Ying <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Tim Chen <[email protected]> Link: http://lkml.kernel.org/r/20170519075...u.sh.intel.com Signed-off-by: Ingo Molnar <[email protected]>
        "

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