umount() taking minutes for FUSE filesystems

[Nikolaus Rath]

*ping*

Anyone able to help?

Thanks,
-Nikolaus

On Aug 24 2017, Nikolaus Rath <Nikolaus at rath.org> wrote:
> Hello,
>
> It seems that in some situations, the unmount() system call takes
> minutes to unmount fuse filesystems. To reproduce, download a Git
> snapshot of libfuse 3 from https://github.com/libfuse/libfuse and do:
>
> $ md build; cd build
> $ meson ..
> $ mesonconf -D buildtype=debug # optional
> $ ninja
>
> Then execute examples/printcap. This will take very long, and all the
> time is spent in the unmount(mountpoint, MNT_FORCE) call in
> mount_bsd.c:fuse_kern_unmount().
>
> Does anyone have an idea what might be causing this and how to fix it?
>
> My hunch is that it has something to do with libfuse no longer
> responding to requests at this point. But I'm at my wits end as to why
> and what to do about it....
>
> Best,
> -Nikolaus
>
> -- 
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>
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             »Time flies like an arrow, fruit flies like a Banana.«