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From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] arm64: Enable CONFIG_COMPAT also for 64k page size
Date: Mon, 8 Dec 2014 10:10:26 +0000	[thread overview]
Message-ID: <20141208101026.GD27367@arm.com> (raw)
In-Reply-To: <54833BAF.1030405@suse.de>

On Sat, Dec 06, 2014 at 05:23:59PM +0000, Alexander Graf wrote:
> On 04.12.14 19:20, Will Deacon wrote:
> > On Thu, Dec 04, 2014 at 03:46:33PM +0000, Alexander Graf wrote:
> >> With binutils 2.25 the default alignment for 32bit arm sections changed to
> >> have everything 64k aligned. Armv7 binaries built with this binutils version
> >> run successfully on an arm64 system.
> >>
> >> Since effectively there is now the chance to run armv7 code on arm64 even
> >> with 64k page size, it doesn't make sense to block people from enabling
> >> CONFIG_COMPAT on those configurations.
> > 
> > Is there a distro available that is built with a recent enough binutils for
> > this? I'd really like to run our regression tests to check that page-size
> > assumptions don't exist for things like shm.
> 
> So how much of a distro do you need? I could probably assemble a simple
> very minimalistic rootfs with only bash if that helps.

I'd like to run LTP, so I'd probably need slightly more than that but I
certainly don't need the whole world.

Will

WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will.deacon@arm.com>
To: Alexander Graf <agraf@suse.de>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	Catalin Marinas <Catalin.Marinas@arm.com>,
	Michael Matz <matz@suse.de>
Subject: Re: [PATCH] arm64: Enable CONFIG_COMPAT also for 64k page size
Date: Mon, 8 Dec 2014 10:10:26 +0000	[thread overview]
Message-ID: <20141208101026.GD27367@arm.com> (raw)
In-Reply-To: <54833BAF.1030405@suse.de>

On Sat, Dec 06, 2014 at 05:23:59PM +0000, Alexander Graf wrote:
> On 04.12.14 19:20, Will Deacon wrote:
> > On Thu, Dec 04, 2014 at 03:46:33PM +0000, Alexander Graf wrote:
> >> With binutils 2.25 the default alignment for 32bit arm sections changed to
> >> have everything 64k aligned. Armv7 binaries built with this binutils version
> >> run successfully on an arm64 system.
> >>
> >> Since effectively there is now the chance to run armv7 code on arm64 even
> >> with 64k page size, it doesn't make sense to block people from enabling
> >> CONFIG_COMPAT on those configurations.
> > 
> > Is there a distro available that is built with a recent enough binutils for
> > this? I'd really like to run our regression tests to check that page-size
> > assumptions don't exist for things like shm.
> 
> So how much of a distro do you need? I could probably assemble a simple
> very minimalistic rootfs with only bash if that helps.

I'd like to run LTP, so I'd probably need slightly more than that but I
certainly don't need the whole world.

Will

  reply	other threads:[~2014-12-08 10:10 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-12-04 15:46 [PATCH] arm64: Enable CONFIG_COMPAT also for 64k page size Alexander Graf
2014-12-04 15:46 ` Alexander Graf
2014-12-04 18:18 ` Laura Abbott
2014-12-04 18:18   ` Laura Abbott
2014-12-04 18:20 ` Will Deacon
2014-12-04 18:20   ` Will Deacon
2014-12-04 23:37   ` Alexander Graf
2014-12-04 23:37     ` Alexander Graf
2014-12-08 13:47     ` Michael Matz
2014-12-08 13:47       ` Michael Matz
2014-12-06 17:23   ` Alexander Graf
2014-12-06 17:23     ` Alexander Graf
2014-12-08 10:10     ` Will Deacon [this message]
2014-12-08 10:10       ` Will Deacon
2014-12-08 10:47       ` Alexander Graf
2014-12-08 10:47         ` Alexander Graf
2015-03-11 11:24       ` Alexander Graf
2015-03-11 11:24         ` Alexander Graf
2015-03-11 12:43         ` Andreas Schwab
2015-03-11 12:43           ` Andreas Schwab
2015-03-11 12:47         ` Arnd Bergmann
2015-03-11 12:47           ` Arnd Bergmann
2015-03-11 13:08           ` Alexander Graf
2015-03-11 13:08             ` Alexander Graf
2015-03-11 13:35             ` Andreas Schwab
2015-03-11 13:35               ` Andreas Schwab
2015-03-11 13:51               ` Arnd Bergmann
2015-03-11 13:51                 ` Arnd Bergmann
2015-03-11 13:57                 ` Andreas Schwab
2015-03-11 13:57                   ` Andreas Schwab
2015-03-11 15:44                   ` Alexander Graf
2015-03-11 15:44                     ` Alexander Graf
2015-03-11 16:09                     ` Andreas Schwab
2015-03-11 16:09                       ` Andreas Schwab
2015-03-11 18:11                       ` Alexander Graf
2015-03-11 18:11                         ` Alexander Graf
2015-03-12  9:07                         ` [PATCH] arm64: fix implementation of mmap2 compat syscall Andreas Schwab
2015-03-12  9:07                           ` Andreas Schwab
2015-03-16 14:16           ` [PATCH] arm64: Enable CONFIG_COMPAT also for 64k page size Christopher Covington
2015-03-16 14:16             ` Christopher Covington
2015-03-16 14:19             ` Arnd Bergmann
2015-03-16 14:19               ` Arnd Bergmann
2014-12-04 21:15 ` Olof Johansson
2014-12-04 21:15   ` Olof Johansson
2014-12-04 23:41   ` Alexander Graf
2014-12-04 23:41     ` Alexander Graf
2014-12-04 23:48     ` Olof Johansson
2014-12-04 23:48       ` Olof Johansson
2014-12-05 10:39       ` Arnd Bergmann
2014-12-05 10:39         ` Arnd Bergmann
2014-12-05 11:05         ` Catalin Marinas
2014-12-05 11:05           ` Catalin Marinas
2014-12-05 12:24           ` Arnd Bergmann
2014-12-05 12:24             ` Arnd Bergmann
2014-12-05 12:31             ` Catalin Marinas
2014-12-05 12:31               ` Catalin Marinas
2015-02-18 13:40           ` Christopher Covington
2015-02-18 13:40             ` Christopher Covington
2014-12-05 12:06         ` Alexander Graf
2014-12-05 12:06           ` Alexander Graf
2014-12-05 11:14   ` Catalin Marinas
2014-12-05 11:14     ` Catalin Marinas
2014-12-05 11:35     ` Will Deacon
2014-12-05 11:35       ` Will Deacon
2015-03-13  4:44     ` Jon Masters
2015-03-13  4:44       ` Jon Masters
2014-12-05 16:35 ` Liviu Dudau
2014-12-05 16:35   ` Liviu Dudau

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