linux-kernel - Re: [PATCH 2/2] Markers Implementation for Preempt RCU Boost Tracing

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Message-ID: <20080102175606.GD11496@redhat.com>
Date:	Wed, 2 Jan 2008 12:56:06 -0500
From:	"Frank Ch. Eigler" <fche@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	"Frank Ch. Eigler" <fche@...hat.com>,
	"K. Prasad" <prasad@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org,
	dipankar@...ibm.com, ego@...ibm.com, mathieu.desnoyers@...ymtl.ca,
	paulmck@...ux.vnet.ibm.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 2/2] Markers Implementation for Preempt RCU Boost Tracing

Hi -

On Wed, Jan 02, 2008 at 06:01:57PM +0100, Ingo Molnar wrote:
> [...]
> well, -freorder-blocks seems to be default-enabled at -O2 on gcc 4.2, so 
> we should already be getting that, right?

Right.

> [...]  So it would be nice if we could collect all this offline code
> and stuff it away into another portion of the kernel image. (or,
> into another portion of the object file - which would still be good
> enough in practice)

That would be the -freorder-blocks-and-partition flag, as proposed by
Arjan two Februarys ago.  I don't see any traces of Andi's overriding
"-fno-reorder-blocks" in the current linus tree, so maybe it's time to
resurrect this one:

http://readlist.com/lists/vger.kernel.org/linux-kernel/39/196123.html

- FChE
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