[Bug 216007] XFS hangs in iowait when extracting large number of files

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216007

--- Comment #4 from Peter Pavlisko (bugzkernelorg8392@araxon.sk) ---
> What sort of storage subsystem does this machine have? If it's a spinning
> disk then you've probably just filled memory

Yes, all the disks are classic spinning CMR disks. But, out of all file systems
tried, only XFS is doing this on the test machine. I can trigger this behavior
every time. And kernels from 5.10 and bellow still work, even with my
non-standard .config.

Here is the memory situation when it is stuck:

ftp-back ~ # free
               total        used        free      shared  buff/cache  
available
Mem:         3995528      175872       69240         416     3750416    
3763584
Swap:        2097084           0     2097084

I will try to put together another test machine on Monday, without using any of
the components from this one, just to rule out a hardware bug.

This may not be a XFS bug, but so far only XFS seems to suffer from it.

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