From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <andi@firstfloor.org>
Subject: Re: [PATCH -v7][RFC]: mutex: implement adaptive spinning
Date: Fri, 9 Jan 2009 07:57:08 +0100
Message-ID: <20090109065708.GA26290@one.firstfloor.org>
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Cc: Andi Kleen <andi@firstfloor.org>, "H. Peter Anvin" <hpa@zytor.com>,
	Harvey Harrison <harvey.harrison@gmail.com>,
	Ingo Molnar <mingo@elte.hu>,
	Chris Mason <chris.mason@oracle.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	paulmck@linux.vnet.ibm.com, Gregory Haskins <ghaskins@novell.com>,
	Matthew Wilcox <matthew@wil.cx>,
	Andrew Morton <akpm@linux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	linux-btrfs <linux-btrfs@vger.kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Nick Piggin <npiggin@suse.de>,
	Peter Morreale <pmorreale@novell.com>,
	Sven Dietrich <SDietrich@novell.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Return-path: <linux-btrfs-owner@vger.kernel.org>
In-Reply-To: <alpine.LFD.2.00.0901081940260.6528@localhost.localdomain>
List-ID: <linux-btrfs.vger.kernel.org>

On Thu, Jan 08, 2009 at 07:42:48PM -0800, Linus Torvalds wrote:
> > I actually often use noinline when developing code simply because it 
> > makes it easier to read oopses when gcc doesn't inline ever static
> > (which it normally does if it only has a single caller)
> 
> Yes. Gcc inlining is a total piece of sh*t.

The static inlining by default (unfortunately) saves a lot of text size.

For testing I built an x86-64 allyesconfig kernel with 
-fno-inline-functions-called-once (which disables the default static
inlining), and it increased text size by ~4.1% (over 2MB for a allyesconfig 
kernel). So I think we have to keep that, dropping it would cost too
much :/

-Andi

-- 
ak@linux.intel.com