https://bugs.kde.org/show_bug.cgi?id=423532
Bug ID: 423532
Summary: PreviewJob to apply remote maxSize to mounted remotes?
Product: frameworks-kio
Version: git master
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kio-bugs-n...@kde.org
Reporter: sit...@kde.org
CC: kdelibs-b...@kde.org
Target Milestone: ---
Right now we only apply the remote max size setting to items that are
isLocalFile() or for which their protocol is :local. The trouble is that just
because a path is local doesn't mean that the filesystem is. Which makes e.g.
an sshfs mount both technically and practically a "remote" meaning the size
constraints applied to remotes should apply to mounted remotes as well.
Making this change would mean, by default, previews are off for mounted remotes
as well, reducing the risk of bottlenecking the remotes with preview related
IO. And of course users can then also opt to have previews enabled, albeit at a
lower cut off point than for local files.
This would help to reduce the risk of bugs like bug #423082 and bug #178678
happening. They are a general type of issue where our code easily can fall into
the trap that a local path means we can use local synchronous IO API when in
fact that means the GUI thread will block until we got a reply from the remote.
By not drowning the remote with previews there is more bandwidth to accommodate
blocking stat() calls and the like.
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