linux-kernel - Re: [PATCH] nvme_core: scan namespaces asynchronously

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Message-ID: <06144d0d-f20d-45a5-a7f9-e3a07e6f906a@nvidia.com>
Date: Thu, 4 Jan 2024 23:06:22 +0000
From: Chaitanya Kulkarni <chaitanyak@...dia.com>
To: Stuart Hayes <stuart.w.hayes@...il.com>
CC: Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...nel.dk>, Christoph
 Hellwig <hch@....de>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, Sagi Grimberg <sagi@...mberg.me>,
	"linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>
Subject: Re: [PATCH] nvme_core: scan namespaces asynchronously

On 1/4/2024 8:38 AM, Stuart Hayes wrote:
> Currently NVME namespaces are scanned serially, so it can take a long time
> for all of a controller's namespaces to become available, especially with a
> slower (fabrics) interface with large number (~1000) of namespaces.
> 
> Use async function calls to make namespace scanning happen in parallel,
> and add a (boolean) module parameter "async_ns_scan" to enable this.
> 
> Signed-off-by: Stuart Hayes <stuart.w.hayes@...il.com>
> 

please update commit log with detailed setup information and
% time saved to make everyone else review it quickly ...

-ck