Re: [PATCH v2] ceph: fix deadlock bugs by making iput() calls asynchronous

[Al Viro]

On Wed, Sep 17, 2025 at 03:59:07PM +0200, Max Kellermann wrote:

> After advice from Mateusz Guzik, I decided to do the latter.  The
> implementation is simple because it piggybacks on the existing
> work_struct for ceph_queue_inode_work() - ceph_inode_work() calls
> iput() at the end which means we can donate the last reference to it.
> 
> This patch adds ceph_iput_async() and converts lots of iput() calls to
> it - at least those that may come through writeback and the messenger.

What would force those delayed calls through at fs shutdown time?