Re: [PATCH] ceph: fix deadlock bugs by making iput() calls asynchronous

[Max Kellermann]

On Thu, Sep 18, 2025 at 12:51 AM Dave Chinner <david@xxxxxxxxxxxxx> wrote:
> - wait for Josef to finish his inode refcount rework patchset that
>   gets rid of this whole "writeback doesn't hold an inode reference"
>   problem that is the root cause of this the deadlock.

No, it is necessary to have a minimal fix that is eligible for stable backports.

Of course, my patch is a kludge; this problem is much larger and a
general, global solution should be preferred. But my patch is minimal,
easy to understand, doesn't add overhead and piggybacks on an existing
Ceph feature (per-inode work) that is considered mature and stable.
It can be backported easily to 6.12 and 6.6 (with minor conflicts due
to renamed netfs functions in adjacent lines).