Re: cpu bound I/O behaviour in linux 5.4 (possibly others)

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On Fri, Feb 14, 2020 at 05:36:54PM +0500, Roman Mamedov <rm@xxxxxxxxxxx> wrote:
> 
> You don't seem to mention which version you upgraded from. If a full bisect is
> impractical, this is the (very distant) next best thing you can do. Was it from
> 5.14.14, or from 3.4? :)

It was 5.2.21, and before that, 4.19. I might be able to do this, but it's
not something that I can quickly do to test this out.

> Also would be nice if you can double-check that returning to that previous
> version right now makes the issue go away, and it's not a coincidence of
> something else changed on the FS or OS (such as other package upgrades beside
> the kernel).

Would have done so, if I could easily do that. In the meantime, it's a
definite possibility that this is not actually something new, but only
something that recently manifested due to different I/O patterns.

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