netdev - Report on abnormal behavior of "page

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Message-ID: <305a3c3dfc854be6bbd058e2d54c855c@realtek.com>
Date: Wed, 31 Jan 2024 07:31:30 +0000
From: Justin Lai <justinlai0215@...ltek.com>
To: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Report on abnormal behavior of "page_pool" API

To whom it may concern,

I hope this email finds you well. I am writing to report a behavior
which seems to be abnormal.

When I remove the module, I call page_pool_destroy() to release the
page_pool, but this message appears, page_pool_release_retry() stalled 
pool shutdown 1024 inflight 120 sec. Then I tried to return the page to
page_pool before calling page_pool_destroy(), so I called
page_pool_put_full_page() first, but after doing so, this message was
printed, page_pool_empty_ring() page_pool refcnt 0 violation, and the
computer crashed.

I would like to ask what could be causing this and how I should fix it.

The information on my working environment is: Ubuntu23.10,
linux kernel 6.4, 6.5, 6.6

Thank you for your time and efforts, I am looking forward to your reply.

Best regards,
Justin