linux-kernel - Re: [PATCH] lightnvm: fix memory leak when submit fails

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Message-ID: <474055ad-978a-4da5-d7f0-e2dc862b781c@lightnvm.io>
Date:   Thu, 21 Jan 2021 14:55:53 +0100
From:   Matias Bjørling <mb@...htnvm.io>
To:     Jens Axboe <axboe@...nel.dk>, Pan Bian <bianpan2016@....com>
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] lightnvm: fix memory leak when submit fails

On 21/01/2021 13.47, Jens Axboe wrote:
> On 1/21/21 12:22 AM, Pan Bian wrote:
>> The allocated page is not released if error occurs in
>> nvm_submit_io_sync_raw(). __free_page() is moved ealier to avoid
>> possible memory leak issue.
> Applied, thanks.
>
> General question for Matias - is lightnvm maintained anymore at all, or
> should we remove it? The project seems dead from my pov, and I don't
> even remember anyone even reviewing fixes from other people.
>
Hi Jens,

ZNS has superseded OCSSD/lightnvm. As a result, the hardware and 
software development around OCSSD have also moved on to ZNS. To my 
knowledge, there is not anyone implementing OCSSD1.2/2.0 commercially at 
this point, and what has been deployed in production does not utilize 
the Linux kernel stack.

I do not mind continuing to keep an eye on it, but on the other hand, it 
has served its purpose. It enabled the "Open-Channel SSD architectures" 
of the world to take hold in the market and thereby gained enough 
momentum to be standardized in NVMe as ZNS.

Would you like me to send a PR to remove lightnvm immediately, or should 
we mark it as deprecated for a while before pulling it?

Best, Matias