linux-kernel - Re: [RFC] gcc feature request: Moving blocks into sections

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Message-ID: <87siyo3qna.fsf@tassilo.jf.intel.com>
Date:	Mon, 05 Aug 2013 12:04:57 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, gcc <gcc@....gnu.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	David Daney <ddaney.cavm@...il.com>,
	Behan Webster <behanw@...verseincode.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [RFC] gcc feature request: Moving blocks into sections

Steven Rostedt <rostedt@...dmis.org> writes:

Can't you just use -freorder-blocks-and-partition?

This should already partition unlikely blocks into a
different section. Just a single one of course.

FWIW the disadvantage is that multiple code sections tends
to break various older dwarf unwinders, as it needs
dwarf3 latest'n'greatest.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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