linux-kernel - Re: [GIT, RFC] Killing the Big Kernel Lock

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Date:	Wed, 24 Mar 2010 23:23:24 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	linux-kernel@...r.kernel.org, Matthew Wilcox <matthew@....cx>,
	Thomas Gleixner <tglx@...utronix.de>, jblunck@...e.de,
	Alan Cox <alan@...ux.intel.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jonathan Corbet <corbet@....net>
Subject: Re: [GIT, RFC] Killing the Big Kernel Lock


* Arnd Bergmann <arnd@...db.de> wrote:

> I've built-tested an allmodconfig kernel with CONFIG_BKL disabled on x86_64, 
> i386, powerpc64, powerpc32, s390 and arm to make sure I catch all the 
> modules that depend on BKL, and I've been running various versions of this 
> tree on my desktop machine over the last few weeks while adding stuff.

Very nice work!

How about going one step further:

 - remove CONFIG_BKL altogether
 - remove all the remains of the BKL code in lib/kernel_lock.c and kernel/sched.c
 - turn lock_kernel() into a WARN_ONCE() and unlock_kernel() into a NOP.
 - ...
 - Celebrate! :-)

	Ingo
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