linux-kernel - Re: [HACKERS] Improve lseek scalability v3

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Message-ID: <20110916175027.GF7761@one.firstfloor.org>
Date:	Fri, 16 Sep 2011 19:50:27 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Alvaro Herrera <alvherre@...mandprompt.com>
Cc:	Andres Freund <andres@...razel.de>,
	Matthew Wilcox <matthew@....cx>,
	Andi Kleen <andi@...stfloor.org>,
	viro <viro@...iv.linux.org.uk>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	robertmhaas <robertmhaas@...il.com>,
	Pg Hackers <pgsql-hackers@...tgresql.org>
Subject: Re: [HACKERS] Improve lseek scalability v3

> One other thing we're interested in is portability.  I mean, even if
> Linux were to introduce a new hypothetical syscall that was able to
> return the file size at a ridiculously low cost, we probably wouldn't
> use it because it'd be Linux-specific.  So an improvement of lseek()
> seems to be the best option.

Fully agreed. It doesn't make any sense at all to implement special
syscalls just to workaround a basic system call not scaling.

-Andi
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