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When using top, it shows me that cifsd has used lots of CPU time but in htop the process does not show up at all. I have tried enabling threads (with H) in htop, to no avail. It also does not show up in pstree, even when using parameters that might show me more info (-apcls).

I can find its process id in /proc so it exists.

In ps aux it shows up but in square brackets: [cifsd] is the value of the last column (titled COMMAND).

What kind of a process is this? From the CPU time over uptime, it seems to use 7.8% CPU on average (and it's pretty constant, when looking at top), so it's definitely a process of interest, but htop hides it.

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    Is it a kernel module? I suspect it must be something around that... – Rui F Ribeiro Feb 27 '17 at 11:19
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    Looks like a kernel thread, which is by default hidden in htop. So, update your configuration F2 -> Display Options -> Remove "x" at "Hide kernel threads". – Thomas Feb 27 '17 at 11:23
  • @Thomas Ah, I did not know what square brackets indicated nor that htop hides those by default. Thanks! You should have posted as answer by the way, being earlier than ctx. – Luc Feb 27 '17 at 14:08
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Go to setup and change your 'Display' options:

F2 > Display options

Do not hide kernel threads and show custom thread names:

[ ] Hide kernel threads
[x] Show custom thread names

Save:

F10

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