From: ak@linux.intel.com (Andi Kleen)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: Do not allow unaligned accesses when CONFIG_ALIGNMENT_TRAP
Date: Thu, 26 May 2011 14:10:24 -0700 [thread overview]
Message-ID: <4DDEC1C0.20807@linux.intel.com> (raw)
In-Reply-To: <alpine.LFD.2.00.1105261650330.3207@xanadu.home>
> It is possible that -fconserve-stack is still valuable on ARM given that
> it is also used with -mno-unaligned-access for other things than
> structure packing on the stack, and therefore its merits can be debated
> independently from the alignment issue at hand.
The big advantage of -fconserve-stack is that it throttles the inliner
if the inlining
would cause too much stack growth. This is something you likely want
on ARM too, especially as code gets more and more complex.
-Andi
WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <ak@linux.intel.com>
To: Nicolas Pitre <nico@fluxnic.net>
Cc: "Will Deacon" <will.deacon@arm.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Måns Rullgård" <mans@mansr.com>,
linux-arm-kernel@lists.infradead.org,
lkml <linux-kernel@vger.kernel.org>,
"Andrew Morton" <akpm@linux-foundation.org>,
sam@ravnborg.org
Subject: Re: [PATCH] ARM: Do not allow unaligned accesses when CONFIG_ALIGNMENT_TRAP
Date: Thu, 26 May 2011 14:10:24 -0700 [thread overview]
Message-ID: <4DDEC1C0.20807@linux.intel.com> (raw)
In-Reply-To: <alpine.LFD.2.00.1105261650330.3207@xanadu.home>
> It is possible that -fconserve-stack is still valuable on ARM given that
> it is also used with -mno-unaligned-access for other things than
> structure packing on the stack, and therefore its merits can be debated
> independently from the alignment issue at hand.
The big advantage of -fconserve-stack is that it throttles the inliner
if the inlining
would cause too much stack growth. This is something you likely want
on ARM too, especially as code gets more and more complex.
-Andi
next prev parent reply other threads:[~2011-05-26 21:10 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-23 11:16 [PATCH] ARM: Do not allow unaligned accesses when CONFIG_ALIGNMENT_TRAP Catalin Marinas
2011-05-23 12:30 ` Måns Rullgård
2011-05-23 13:25 ` Russell King - ARM Linux
2011-05-23 13:21 ` Russell King - ARM Linux
2011-05-23 13:51 ` Catalin Marinas
2011-05-23 14:37 ` Måns Rullgård
2011-05-23 14:41 ` Catalin Marinas
2011-05-23 14:52 ` Russell King - ARM Linux
2011-05-24 9:39 ` Catalin Marinas
2011-05-24 14:17 ` Måns Rullgård
2011-05-24 15:26 ` Catalin Marinas
2011-05-24 16:23 ` Måns Rullgård
2011-05-24 17:26 ` Nicolas Pitre
2011-05-24 17:13 ` Dave Martin
2011-05-25 11:14 ` Catalin Marinas
2011-05-25 12:43 ` Dave Martin
2011-05-25 13:32 ` Måns Rullgård
2011-05-25 14:05 ` Dave Martin
2011-05-25 14:48 ` Måns Rullgård
2011-05-25 14:50 ` Catalin Marinas
2011-05-25 14:53 ` Måns Rullgård
2011-05-26 17:10 ` Will Deacon
2011-05-26 17:10 ` Will Deacon
2011-05-26 18:14 ` Måns Rullgård
2011-05-26 18:14 ` Måns Rullgård
2011-05-26 19:58 ` Andi Kleen
2011-05-26 19:58 ` Andi Kleen
2011-05-26 21:03 ` Nicolas Pitre
2011-05-26 21:03 ` Nicolas Pitre
2011-05-26 21:10 ` Andi Kleen [this message]
2011-05-26 21:10 ` Andi Kleen
2011-05-26 21:26 ` Måns Rullgård
2011-05-26 21:26 ` Måns Rullgård
2011-05-27 10:05 ` Will Deacon
2011-05-27 10:05 ` Will Deacon
2011-05-27 16:53 ` Andi Kleen
2011-05-27 16:53 ` Andi Kleen
2011-05-26 21:51 ` Russell King - ARM Linux
2011-05-26 21:51 ` Russell King - ARM Linux
2011-05-26 22:29 ` Andi Kleen
2011-05-26 22:29 ` Andi Kleen
2011-05-27 8:38 ` Catalin Marinas
2011-05-27 8:38 ` Catalin Marinas
2011-05-27 8:54 ` Russell King - ARM Linux
2011-05-27 8:54 ` Russell King - ARM Linux
2011-05-27 9:51 ` Catalin Marinas
2011-05-27 9:51 ` Catalin Marinas
2011-05-27 9:56 ` Catalin Marinas
2011-05-27 9:56 ` Catalin Marinas
2011-05-27 12:46 ` Måns Rullgård
2011-05-27 12:46 ` Måns Rullgård
2011-05-28 15:34 ` [PATCH] Disable -fconserve-stack on ARM Andi Kleen
2011-05-28 15:34 ` Andi Kleen
2011-05-31 16:30 ` Catalin Marinas
2011-05-31 16:30 ` Catalin Marinas
2011-05-31 18:01 ` Andi Kleen
2011-05-31 18:01 ` Andi Kleen
2011-06-02 13:08 ` Catalin Marinas
2011-06-02 13:08 ` Catalin Marinas
[not found] <mailman.254.1306496353.1533.linux-arm-kernel@lists.infradead.org>
2011-05-27 12:14 ` [PATCH] ARM: Do not allow unaligned accesses when CONFIG_ALIGNMENT_TRAP Frank Hofmann
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