From: Andi Kleen <ak@suse.de>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Andi Kleen <ak@suse.de>, linux-kernel@vger.kernel.org
Subject: Re: horrible disk thorughput on itanium
Date: Fri, 7 Dec 2001 18:58:47 +0100 [thread overview]
Message-ID: <20011207185847.A20876@wotan.suse.de> (raw)
In-Reply-To: <p73n10v6spi.fsf@amdsim2.suse.de> <Pine.LNX.4.33.0112070941330.8465-100000@penguin.transmeta.com>
In-Reply-To: <Pine.LNX.4.33.0112070941330.8465-100000@penguin.transmeta.com>
> You can be thread-safe without sucking dead baby donkeys through a straw.
> I already mentioned two possible ways to fix it so that you have locking
> when you need to, and no locking when you don't.
Your proposals sound rather dangerous. They would silently break recompiled
threaded programs that need the locking and don't use -D__REENTRANT (most
people do not seem to use it). I doubt the possible pain from that is
worth it for speeding up an basically obsolete interface like putc.
i.e. if someone wants speed they definitely shouldn't use putc()
-Andi
next prev parent reply other threads:[~2001-12-07 17:59 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <p73r8q86lpn.fsf@amdsim2.suse.de.suse.lists.linux.kernel>
[not found] ` <Pine.LNX.4.33.0112070710120.747-100000@mikeg.weiden.de.suse.lists.linux.kernel>
[not found] ` <9upmqm$7p4$1@penguin.transmeta.com.suse.lists.linux.kernel>
2001-12-07 13:54 ` horrible disk thorughput on itanium Andi Kleen
2001-12-07 14:20 ` Padraig Brady
2001-12-07 16:14 ` Richard Gooch
2001-12-07 17:18 ` Robert Love
2001-12-07 17:40 ` Richard Gooch
2001-12-07 17:48 ` Robert Love
2001-12-07 17:45 ` Linus Torvalds
2001-12-07 17:58 ` Andi Kleen [this message]
2001-12-07 18:14 ` Michael Poole
2001-12-07 18:35 ` Padraig Brady
2001-12-07 21:22 ` Michael Poole
2001-12-07 21:37 ` Padraig Brady
2001-12-07 22:26 ` Michael Poole
2001-12-07 18:15 ` Linus Torvalds
2001-12-07 18:41 ` Padraig Brady
2001-12-07 18:33 ` Padraig Brady
2001-12-07 20:44 ` Greg Hennessy
2001-12-07 21:37 ` Marco Colombo
2001-12-07 20:42 ` David S. Miller
[not found] ` <3C112DE4.60206@antefacto.com>
[not found] ` <20011207.130316.39156883.davem@redhat.com>
2001-12-09 1:19 ` [OT] fputc vs putc " Tom Vier
2001-12-09 1:33 ` Eric W. Biederman
2001-12-09 9:27 ` H. Peter Anvin
2001-12-09 19:14 ` Tom Vier
2001-12-09 22:15 ` H. Peter Anvin
2001-12-07 6:42 Dan Kegel
[not found] <20011206110713.A8404@cox.rr.com.suse.lists.linux.kernel>
[not found] ` <3C0FD955.4510B738@zip.com.au.suse.lists.linux.kernel>
2001-12-06 22:13 ` Andi Kleen
2001-12-07 6:11 ` Mike Galbraith
2001-12-07 6:15 ` Linus Torvalds
2001-12-07 12:32 ` Greg Hennessy
2001-12-07 17:57 ` Marco Colombo
-- strict thread matches above, loose matches on Subject: below --
2001-12-06 16:07 Greg Hennessy
2001-12-06 16:17 ` Arjan van de Ven
2001-12-06 20:47 ` Andrew Morton
2001-12-09 23:13 ` Kurt Garloff
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