From: Anton Blanchard <anton@samba.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Roy Sigurd Karlsbakk <roy@karlsbakk.net>, linux-kernel@vger.kernel.org
Subject: Re: speed difference between using hard-linked and modular drives?
Date: Fri, 9 Nov 2001 10:59:21 +1100 [thread overview]
Message-ID: <20011109105921.A6822@krispykreme> (raw)
In-Reply-To: <Pine.LNX.4.30.0111081700240.1916-100000@mustard.heime.net> <Pine.LNX.4.33.0111081802380.15975-100000@localhost.localdomain>
In-Reply-To: <Pine.LNX.4.33.0111081802380.15975-100000@localhost.localdomain>
> > Are there any speed difference between hard-linked device drivers and
> > their modular counterparts?
>
> minimal. a few instructions per IO.
Its worse on some architectures that need to pass through a trampoline
when going between kernel and module (eg ppc). Its even worse on ppc64
at the moment because we have a local TOC per module which needs to be
saved and restored.
Anton
next prev parent reply other threads:[~2001-11-09 0:00 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-08 16:01 Roy Sigurd Karlsbakk
2001-11-08 17:02 ` Ingo Molnar
2001-11-08 17:37 ` Ingo Molnar
2001-11-08 23:59 ` Anton Blanchard [this message]
2001-11-09 5:11 ` Keith Owens
2001-11-10 3:35 ` Anton Blanchard
2001-11-10 7:26 ` Keith Owens
2001-11-08 17:53 ` Robert Love
[not found] <Pine.LNX.4.33.0111081802380.15975-100000@localhost.localdomain.suse.lists.linux.kernel>
[not found] ` <Pine.LNX.4.33.0111081836080.15975-100000@localhost.localdomain.suse.lists.linux.kernel>
2001-11-08 23:00 ` Andi Kleen
2001-11-09 0:05 ` Anton Blanchard
2001-11-09 5:45 ` Andi Kleen
2001-11-09 6:04 ` David S. Miller
2001-11-09 6:39 ` Andi Kleen
2001-11-09 6:54 ` Andrew Morton
2001-11-09 7:17 ` David S. Miller
2001-11-09 7:16 ` Andrew Morton
2001-11-09 8:21 ` Ingo Molnar
2001-11-09 7:35 ` Andrew Morton
2001-11-09 7:44 ` David S. Miller
2001-11-09 7:24 ` David S. Miller
2001-11-10 4:56 ` Anton Blanchard
2001-11-10 5:09 ` Andi Kleen
2001-11-10 13:44 ` David S. Miller
2001-11-10 13:52 ` David S. Miller
2001-11-10 13:29 ` David S. Miller
2001-11-09 7:14 ` David S. Miller
2001-11-09 7:16 ` David S. Miller
2001-11-09 12:54 ` David S. Miller
2001-11-09 13:15 ` Philip Dodd
2001-11-09 13:17 ` Andi Kleen
2001-11-09 13:25 ` David S. Miller
2001-11-09 13:39 ` Andi Kleen
2001-11-09 13:41 ` David S. Miller
2001-11-09 13:26 ` David S. Miller
2001-11-09 20:45 ` Mike Fedyk
2001-11-09 12:59 ` Alan Cox
2001-11-10 5:20 ` Anton Blanchard
2001-11-09 3:12 ` Rusty Russell
2001-11-09 5:59 ` Andi Kleen
2001-11-09 11:16 ` Helge Hafting
2001-11-12 23:23 ` David S. Miller
2001-11-12 23:14 ` Rusty Russell
2001-11-13 1:30 ` Mike Fedyk
2001-11-13 1:15 ` David Lang
2001-11-12 9:59 ` Rusty Russell
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