linux-kernel - Re: ext3 IO latency measurements (was: Linux 2.6.29)

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Message-ID: <20090327112248.2746a4ba@lxorguk.ukuu.org.uk>
Date:	Fri, 27 Mar 2009 11:22:48 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Bron Gondwana <brong@...tmail.fm>
Cc:	Matthew Garrett <mjg@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Theodore Tso <tytso@....edu>, Ingo Molnar <mingo@...e.hu>,
	Jan Kara <jack@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Nick Piggin <npiggin@...e.de>,
	Jens Axboe <jens.axboe@...cle.com>,
	David Rees <drees76@...il.com>, Jesper Krogh <jesper@...gh.cc>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Roland McGrath <roland@...hat.com>
Subject: Re: ext3 IO latency measurements (was: Linux 2.6.29)

> Is this the same Alan Cox who thought a couple of months ago that
> having an insanely low default maximum number epoll instances was a
> reasonable answer to a theoretical DoS risk, despite it breaking
> pretty much every reasonable user of the epoll interface?

In the short term yes - because security has to be a very high priority.
Lesser of two evils.

Alan
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