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SubjectRe: [regression -next0117] What is kcompactd and why is he eating 100% of my cpu?
On Mon, 28 Jan 2019 10:16:27 +0100, Jan Kara said:

> So my buffer_migrate_page_norefs() is certainly buggy in its current
> incarnation (as a result block device page cache is not migratable at all).
> I've sent Andrew a patch over week ago but so far it got ignored. The patch
> is attached, can you give it a try whether it changes something for you?
> Thanks!

Been running with the patch for about 24 hours, haven't seen kcompactd
misbehave. I even fired up a Chrome with a lot of tabs open, a Firefox, and a
kernel build, intentionally drove the system into swapping, and kcompactd
didn't make it into the top 10 on 'top'.

I'm willing to say put a "tested-by:" on that one, it looks fixed from here.
If there's any remaining bugs, they're ones I can't seem to trigger...

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