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docs: add note about systemd df RECLAIMABLE bug

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Our calculation is just wrong and the way the entire API is designed it
cannot work. This is the same interface as docker is using and they have
the same bug there. So simply document this as known problem, in case
users complain we at least have something to point to.

An actual fix might be possible but not without reworking the full API
and because this is exposed in the docker compat and libpod REST API we
cannot really change it.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>
This commit is contained in:
Paul Holzinger
2025-03-07 16:18:54 +01:00
parent 97cab8c9c0
commit 69dc0720b9
1 changed files with 5 additions and 1 deletions
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docs/source/markdown/podman-system-df.1.md
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@ -7,7 +7,11 @@ podman\-system\-df - Show podman disk usage
**podman system df** [*options*]
## DESCRIPTION
Show podman disk usage
Show podman disk usage for images, containers and volumes.
Note: The RECLAIMABLE size that is reported for images can be incorrect. It might
report that it can reclaim more than a prune would actually free. This will happen
if you are using different images that share some layers.
## OPTIONS
#### **--format**=*format*