I was looking at https://gitlab.com/psmisc/psmisc/-/issues/39 which is a
similar, but different issue. Same physical device but due to mount
namespaces different device ID.
I'd be curious if lsof finds the access.

Also the mountinfo-list finding it is curious, it matches devices a
different way.

 - Craig


On Tue, 22 Aug 2023 at 12:07, Paul Kimoto <kim...@fastmail.net> wrote:

> On Wed, Aug 16, 2023 at 11:03:14PM -0400, Paul Kimoto wrote:
> > On Wed, Aug 16, 2023 at 05:25:26PM +1000, Craig Small wrote:
> >> What does
> >> grep -e ' 0:2[57] ' /proc/self/mountinfo
> >> show?
> >
> > 29 1 0:25 /@rootfs / rw,relatime shared:1 - btrfs /dev/sda3
> >   rw,compress=zstd:1,ssd,space_cache=v2,subvolid=256,subvol=/@rootfs
>
> FWIW, fuser from psmisc-23.4 configured with
> "--enable-mountinfo-list" produces the kind of output I expect.
> (Without "--enable-mountinfo-list", it doesn't.)
>

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