netdev - Re: [PATCH] Break up the single NBD lock into one per NBD device

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Message-ID: <1359993343.18869.14.camel@eboracum.office.bytemark.co.uk>
Date:	Mon, 04 Feb 2013 15:55:43 +0000
From:	Nicholas Thomas <nick@...emark.co.uk>
To:	netdev@...r.kernel.org
Cc:	hkchu@...gle.com
Subject: Re: [PATCH] Break up the single NBD lock into one per NBD device

Hi,

I was wondering if there was any chance of resurrecting this patch: 

http://comments.gmane.org/gmane.linux.network/207233

My use case is a Linux kernel connecting to up to 6,144 NBD devices (in
practice, probably < 1,000 almost all the time) simultaneously - our
current deployment has a userspace implementation of NBD, and I came
across this patch while investigating potential scalability issues.

I've not performed any benchmarks yet, but I assume the issues Jerry Chu
mentions would affect my case too, and the asked-for changes to get it
accepted seemed minimal.

Regards,
-- 
Nick Thomas
Bytemark Computing

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