linux-kernel - Re: [PATCH v3 00/17] enable nvmet-fc for blktests

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Message-ID: <ZZSBwNifBWtD5fFr@kbusch-mbp.dhcp.thefacebook.com>
Date: Tue, 2 Jan 2024 14:36:01 -0700
From: Keith Busch <kbusch@...nel.org>
To: Daniel Wagner <dwagner@...e.de>
Cc: linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Christoph Hellwig <hch@....de>, Sagi Grimberg <sagi@...mberg.me>,
	James Smart <james.smart@...adcom.com>,
	Hannes Reinecke <hare@...e.de>
Subject: Re: [PATCH v3 00/17] enable nvmet-fc for blktests

On Mon, Dec 18, 2023 at 04:30:48PM +0100, Daniel Wagner wrote:
> Another update on getting nvmet-fc ready for blktests. The main change here is
> that I tried make sense of the ref count taking in nvmet-fc. When running
> blktests with the auto connect udev rule activated the additional connect
> attempt etc made nvmet-fc explode and choke everywhere. After a lot of poking
> and pondering I decided to change the rules who the ref counts are taken for the
> ctrl, association, target port and host port. This made a big difference and I
> am able to get blktests pass the tests.
> 
> Also KASAN was reporting a lot of UAFs. There are still some problems left as I
> can still observe hangers when running blktests in a loop for a while. But it
> doesn't explode immediately so I consider this a win.
> 
> Apropos KASAN, it still reports the problem from [1], so anyone who want to run
> this series needs to revert ee6fdc5055e9 ("nvme-fc: fix race between error
> recovery and creating association").
> 
> The first four patches are independent of the rest and could go in sooner.

Applied patches 2-5 to nvme-6.8.