https://bugs.kde.org/show_bug.cgi?id=178678

Harald Sitter <sit...@kde.org> changed:

           What    |Removed                     |Added
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           Assignee|fa...@kde.org               |kio-bugs-n...@kde.org

--- Comment #77 from Harald Sitter <sit...@kde.org> ---
I am still not able to reproduce this :/
Are you 100% confident that previews aren't enabled? Do you know how to use gdb
so we can verify that?

For good measure I did try with previews and I can kind of reproduce the
intermittent lockups, but only when previews are enabled. I'm starving IO
responsiveness by setting a cap on read requests per second
`IOReadIOPSMax='/dev/sdc 4'` of the ssh slice and that then indeed causes
dolphin to get choppy as it is waiting. What seems to happen there is that a
mimetype query is issued before starting a PreviewJob [1] and that is a read
operation unless the KFileItem was explicitly told not to look at the content
[2]. Without previews nor the info sidebar I can even limit IO per second to 1
and dolphin will stay responsive. So, something still doesn't add up here.

[1]
https://invent.kde.org/system/dolphin/-/blob/master/src/kitemviews/kfileitemmodelrolesupdater.cpp#L905
 
[2]
https://invent.kde.org/frameworks/kio/-/blob/master/src/core/kfileitem.cpp#L506

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