Re: [fuse-devel] fusermount reports "Device or resource busy" but unmounts it anyway

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[CCs added]

On Tue, May 12, 2015 at 11:34 AM, Richard W.M. Jones <rjones@xxxxxxxxxx> wrote:
>
> Has something changed in FUSE / the kernel in the past few months so
> that 'fusermount -u /mp' reports the error:
>
>   fusermount: failed to unmount /mp: Device or resource busy
>

That's from the umount2() syscall, and most likely not a fuse issue.

> and returns a non-zero exit code, but the mountpoint is unmounted
> anyway?

Is this in 4.1-rc?  If so, then the recent fs/namespace.c patches from
Eric Biederman would be suspect.

Thanks,
Miklos


>
> We have a fusermount wrapper which relies on the fact that fusermount
> either succeeds & unmounts; or reports an error & doesn't unmount --
> the wrapper retries in this case.
>
> Rich.
>
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