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From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
To: Luigi Rizzo <rizzo@iet.unipi.it>
References: <200912052009.nB5K9okL098577@svn.freebsd.org>
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Date: Mon, 07 Dec 2009 11:56:18 +0100
In-Reply-To: <20091207105343.GA62012@onelab2.iet.unipi.it> (Luigi Rizzo's
	message of "Mon, 7 Dec 2009 11:53:43 +0100")
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Cc: svn-src-head@freebsd.org, Ed Schouten <ed@80386.nl>,
	svn-src-all@freebsd.org, src-committers@freebsd.org,
	Hajimu UMEMOTO <ume@freebsd.org>
Subject: Re: the need for safe dynamic string libraries
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Luigi Rizzo <rizzo@iet.unipi.it> writes:
> What do you mean exactly ?

When libsbuf was ported to userland, sbuf_printf() was pessimized due to
the limitations of libc's printf().  This makes certain parts of
pseudofs extremely inefficient: for instance, if you read from a
/proc/whatever that's backed by an sbuf, it has to generate the entire
file even if you only asked for a small chunk at a large offset.

DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no