From: stuart hayes <stuart.w.hayes@gmail.com>
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>
Subject: Re: [PATCH v2] driver core: shut down devices asynchronously
Date: Sat, 16 Sep 2023 15:02:16 -0500 [thread overview]
Message-ID: <9770fe32-2b0c-639e-481a-dd8686e5eb7d@gmail.com> (raw)
In-Reply-To: <20230913210516.3545-1-stuart.w.hayes@gmail.com>
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.
prev parent reply other threads:[~2023-09-16 20:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-13 21:05 Stuart Hayes
2023-09-14 6:25 ` kernel test robot
2023-09-16 20:02 ` stuart hayes [this message]
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