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Old 03-18-2019, 08:53 AM   #1
vasim38
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Registered: Apr 2018
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NVMe process on linux box


-sh-4.2$ ps -ef| grep nvme
root 1161 2 0 Jan28 ? 00:00:00 [nvme-wq]
root 1184 2 0 Jan28 ? 00:00:00 [nvme-reset-wq]
root 1199 2 0 Jan28 ? 00:00:00 [nvme-delete-wq]


-sh-4.2$ cat /sys/block/sda/queue/rotational
1


I see some of our box has NVMe processes which seems to be related to SSD. When i see the type of disk the box has that's HDD as per the output of command above.

Can you let me know what these processes are ? Is that related when i have HDD on box ? Also any ways to check logs when i don't see logs in /var/log ?

OS : CentOS 7

Last edited by vasim38; 03-18-2019 at 09:36 AM.
 
Old 03-18-2019, 09:20 AM   #2
TB0ne
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Registered: Jul 2003
Location: Birmingham, Alabama
Distribution: SuSE, RedHat, Slack,CentOS
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Quote:
Originally Posted by vasim38 View Post
Code:
-sh-4.2$ ps -ef| grep nvme
root      1161     2  0 Jan28 ?        00:00:00 [nvme-wq]
root      1184     2  0 Jan28 ?        00:00:00 [nvme-reset-wq]
root      1199     2  0 Jan28 ?        00:00:00 [nvme-delete-wq]

-sh-4.2$ cat /sys/block/sda/queue/rotational
1
I see some of our box has NVMe processes which seems to be related to SSD. When i see the type of disk the box has that's HDD as per the output of command above. Can you let me know what these processes are ? Is that related when i have HDD on box ? Also any ways to check logs when i don't see logs in /var/log ?
Since you tell us absolutely NOTHING about your system (like what kind/how many drives it has in it), what do you think we'll be able to tell you? Version/distro of Linux? Why this is an issue, what problem(s) it's causing, etc.

Your logs may be in a different place, but since you don't tell us anything about your system, we can't begin to guess. Read the "Question Guidelines" link in my posting signature.
 
Old 03-19-2019, 10:23 AM   #3
ThatItGuy10499
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Registered: Jun 2012
Location: Vancouver, BC
Distribution: Slackware 13.37 x64
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Lightbulb These processes are kernel module related...

You can relax, these are kernel management related drivers that tie to your NVMe Controller and itís ability to use hotplug functionality.

Source: Linux Kernel: https://lore.kernel.org/patchwork/patch/905082/

It would be helpful in future for the op to provide more detailed information about their system. If you do some googling Iím sure you can learn about any NVMe user space tools. Either way, these are valid processes and may cause you issues if you attempt to tamper with them. If your hard drive is NVMe, then you definitely want to leave these alone.

hdparm -i or hdparm -I

Will query and provide data about your drive.
 
  


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