Changing a built-in kernel module parameter at booting time?

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I am trying to change a parameter, called "sgl_threshold", in the nvme driver when booting into Ubuntu 16.04 running linux kernel v4.18-generic.



It appears the nvme driver is actually built-in as it is not found using lsmod and is being used by a device, and also is found in /sys/module/nvme/(parameters are found in /sys/module/nvme/parameters).



My question is how can I change this built-in module's parameter at runtime, or permanently change this parameter whenever the nvme driver is loaded?



I have tried creating a file in modprobe.d with nvme sgl_threshold=1, and also editing GRUB_CMDLINE_LINUX_DEFAULT in the default grub file.






kernel kernel-modules nvme







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    up vote
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    down vote

    favorite












    I am trying to change a parameter, called "sgl_threshold", in the nvme driver when booting into Ubuntu 16.04 running linux kernel v4.18-generic.



    It appears the nvme driver is actually built-in as it is not found using lsmod and is being used by a device, and also is found in /sys/module/nvme/(parameters are found in /sys/module/nvme/parameters).



    My question is how can I change this built-in module's parameter at runtime, or permanently change this parameter whenever the nvme driver is loaded?



    I have tried creating a file in modprobe.d with nvme sgl_threshold=1, and also editing GRUB_CMDLINE_LINUX_DEFAULT in the default grub file.






    kernel kernel-modules nvme







    share|improve this question

























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I am trying to change a parameter, called "sgl_threshold", in the nvme driver when booting into Ubuntu 16.04 running linux kernel v4.18-generic.



      It appears the nvme driver is actually built-in as it is not found using lsmod and is being used by a device, and also is found in /sys/module/nvme/(parameters are found in /sys/module/nvme/parameters).



      My question is how can I change this built-in module's parameter at runtime, or permanently change this parameter whenever the nvme driver is loaded?



      I have tried creating a file in modprobe.d with nvme sgl_threshold=1, and also editing GRUB_CMDLINE_LINUX_DEFAULT in the default grub file.






      kernel kernel-modules nvme







      share|improve this question















      I am trying to change a parameter, called "sgl_threshold", in the nvme driver when booting into Ubuntu 16.04 running linux kernel v4.18-generic.



      It appears the nvme driver is actually built-in as it is not found using lsmod and is being used by a device, and also is found in /sys/module/nvme/(parameters are found in /sys/module/nvme/parameters).



      My question is how can I change this built-in module's parameter at runtime, or permanently change this parameter whenever the nvme driver is loaded?



      I have tried creating a file in modprobe.d with nvme sgl_threshold=1, and also editing GRUB_CMDLINE_LINUX_DEFAULT in the default grub file.






      kernel kernel-modules nvme




      kernel kernel-modules nvme






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      edited Sep 19 at 13:52









      Goro

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      6,16652762










      asked Sep 19 at 13:49









      tjpereira

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      262




















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          Ended up figuring this out...



          Edit the defualt grub file (/etc/default/grub) at the line beginning with GRUB_CMDLINE_LINUX_DEFAULT and append nvme.sgl_threshold=1 within the quotation marks.






          share|improve this answer




















          • Also need to call 'sudo update-grub' for the change to stick.
            – Dave
            Sep 28 at 17:11










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          1 Answer
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          active

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          active

          oldest

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          up vote
          2
          down vote













          Ended up figuring this out...



          Edit the defualt grub file (/etc/default/grub) at the line beginning with GRUB_CMDLINE_LINUX_DEFAULT and append nvme.sgl_threshold=1 within the quotation marks.






          share|improve this answer




















          • Also need to call 'sudo update-grub' for the change to stick.
            – Dave
            Sep 28 at 17:11














          up vote
          2
          down vote













          Ended up figuring this out...



          Edit the defualt grub file (/etc/default/grub) at the line beginning with GRUB_CMDLINE_LINUX_DEFAULT and append nvme.sgl_threshold=1 within the quotation marks.






          share|improve this answer




















          • Also need to call 'sudo update-grub' for the change to stick.
            – Dave
            Sep 28 at 17:11












          up vote
          2
          down vote










          up vote
          2
          down vote









          Ended up figuring this out...



          Edit the defualt grub file (/etc/default/grub) at the line beginning with GRUB_CMDLINE_LINUX_DEFAULT and append nvme.sgl_threshold=1 within the quotation marks.






          share|improve this answer












          Ended up figuring this out...



          Edit the defualt grub file (/etc/default/grub) at the line beginning with GRUB_CMDLINE_LINUX_DEFAULT and append nvme.sgl_threshold=1 within the quotation marks.







          share|improve this answer












          share|improve this answer



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          answered Sep 19 at 14:12









          tjpereira

          262




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          • Also need to call 'sudo update-grub' for the change to stick.
            – Dave
            Sep 28 at 17:11
















          • Also need to call 'sudo update-grub' for the change to stick.
            – Dave
            Sep 28 at 17:11















          Also need to call 'sudo update-grub' for the change to stick.
          – Dave
          Sep 28 at 17:11




          Also need to call 'sudo update-grub' for the change to stick.
          – Dave
          Sep 28 at 17:11

















           

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