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Message-ID: <9770fe32-2b0c-639e-481a-dd8686e5eb7d@gmail.com>
Date:   Sat, 16 Sep 2023 15:02:16 -0500
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Subject: Re: [PATCH v2] driver core: shut down devices asynchronously
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To:     linux-kernel@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J . Wysocki" <rafael@kernel.org>,
        Tanjore Suresh <tansuresh@google.com>,
        Martin Belanger <Martin.Belanger@dell.com>,
        Oliver O'Halloran <oohall@gmail.com>,
        Daniel Wagner <dwagner@suse.de>,
        Keith Busch <kbusch@kernel.org>, Lukas Wunner <lukas@wunner.de>
References: <20230913210516.3545-1-stuart.w.hayes@gmail.com>
From:   stuart hayes <stuart.w.hayes@gmail.com>
In-Reply-To: <20230913210516.3545-1-stuart.w.hayes@gmail.com>
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On 9/13/2023 4:05 PM, Stuart Hayes wrote:
> Shut down devices asynchronously, ensuring that each device is shut down
> before its parents.
> 
> This can dramatically reduce system shutdown/reboot time on systems that
> have devices that take many seconds to shut down, such as some NVMe drives.
> On one system tested, the shutdown time went from 11 minutes without this
> patch to 55 seconds with the patch.
> 
> Signed-off-by: Stuart Hayes <stuart.w.hayes@gmail.com>
> ---
> v1->v2: rewritten using kernel async code (suggested by Lukas Wunner)
> ---
> 
>   drivers/base/base.h   |   2 +
>   drivers/base/core.c   | 135 ++++++++++++++++++++++++------------------
>   include/linux/async.h |   6 ++
>   3 files changed, 87 insertions(+), 56 deletions(-)
> 

Please disregard this patch... I realized this could be done in a simpler way.  I'll send a V3 this week.