linux-kernel - Re: nbd: please don't spawn 16 threads when nbd is not even in use

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Message-ID: <20221123200845.cuct5euvikqksojm@redhat.com>
Date:   Wed, 23 Nov 2022 14:09:31 -0600
From:   Eric Blake <eblake@...hat.com>
To:     Pavel Machek <pavel@....cz>
Cc:     kernel list <linux-kernel@...r.kernel.org>, josef@...icpanda.com,
        linux-block@...r.kernel.org, nbd@...er.debian.org
Subject: Re: nbd: please don't spawn 16 threads when nbd is not even in use

On Tue, Nov 22, 2022 at 12:56:41PM +0100, Pavel Machek wrote:
> Hi!
> 
> I see this... and it looks like there are 16 workqueues before nbd is
> even used. Surely there are better ways to do that?

Yes, it would be nice to create a pool of workers that only spawns up
threads when actual parallel requests are made.  Are you willing to
help write the patch?


-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
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