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From: Florian Fainelli <florian@openwrt.org>
To: Theodore Ts'o <tytso@mit.edu>, Eric Whitney <enwlinux@gmail.com>,
	Dmitry Monakhov <dmonakhov@openvz.org>,
	Christian Kujau <lists@nerdbynature.de>,
	CAI Qian <caiqian@redhat.com>,
	LKML <linux-kernel@vger.kernel.org>,
	linux-s390 <linux-s390@vger.kernel.org>,
	Steve Best <sbest@redhat.com>,
	linux-ext4@vger.kernel.org
Subject: Re: [PATCH] ext4: fix a big-endian bug when an extent is zeroed out
Date: Wed, 03 Apr 2013 17:23:22 +0200	[thread overview]
Message-ID: <515C496A.6050809@openwrt.org> (raw)
In-Reply-To: <20130403144114.GB13668@thunk.org>

Hello,

Le 04/03/13 16:41, Theodore Ts'o a écrit :
> On Wed, Apr 03, 2013 at 10:34:06AM -0400, Eric Whitney wrote:
>>
>> The TI OMAP4 processor on my Pandaboard test system is little endian.
>
> Ah... so basically, we need to find a test platform which allows us to
> boot arbitrary kernels and allows us to have root access (which means
> it's unlikely we'll be able to do this via remote access) and which
> doesn't have exotic power requirements (which as far as I know rules
> out pSeries and zSeries systems....)
>
> It would also be nice if we could run tests in finite time, which
> probably rules out the Hercules emulator (it runs at one-tenth zSeries
> processor speeds, which doesn't win speed competitions by default, and
> I suspect their storage speeds are even worse).
>
> Anyone else have any suggestions?  Or anyone willing to help us run
> ext4 regression tests on the ext4 dev tree, so we can find these
> problems before we merge into mainline?

Qemu emulates various mainline PowerPC, MIPS and SPARC big-endian 
systems pretty efficiently and it should not be too hard neither to 
script nor to get a recent kernel up and running on these platforms.

My 2 cents.
--
Florian
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WARNING: multiple messages have this Message-ID (diff)
From: Florian Fainelli <florian@openwrt.org>
To: "Theodore Ts'o" <tytso@mit.edu>,
	Eric Whitney <enwlinux@gmail.com>,
	Dmitry Monakhov <dmonakhov@openvz.org>,
	Christian Kujau <lists@nerdbynature.de>,
	CAI Qian <caiqian@redhat.com>,
	LKML <linux-kernel@vger.kernel.org>,
	linux-s390 <linux-s390@vger.kernel.org>,
	Steve Best <sbest@redhat.com>,
	linux-ext4@vger.kernel.org
Subject: Re: [PATCH] ext4: fix a big-endian bug when an extent is zeroed out
Date: Wed, 03 Apr 2013 17:23:22 +0200	[thread overview]
Message-ID: <515C496A.6050809@openwrt.org> (raw)
In-Reply-To: <20130403144114.GB13668@thunk.org>

Hello,

Le 04/03/13 16:41, Theodore Ts'o a écrit :
> On Wed, Apr 03, 2013 at 10:34:06AM -0400, Eric Whitney wrote:
>>
>> The TI OMAP4 processor on my Pandaboard test system is little endian.
>
> Ah... so basically, we need to find a test platform which allows us to
> boot arbitrary kernels and allows us to have root access (which means
> it's unlikely we'll be able to do this via remote access) and which
> doesn't have exotic power requirements (which as far as I know rules
> out pSeries and zSeries systems....)
>
> It would also be nice if we could run tests in finite time, which
> probably rules out the Hercules emulator (it runs at one-tenth zSeries
> processor speeds, which doesn't win speed competitions by default, and
> I suspect their storage speeds are even worse).
>
> Anyone else have any suggestions?  Or anyone willing to help us run
> ext4 regression tests on the ext4 dev tree, so we can find these
> problems before we merge into mainline?

Qemu emulates various mainline PowerPC, MIPS and SPARC big-endian 
systems pretty efficiently and it should not be too hard neither to 
script nor to get a recent kernel up and running on these platforms.

My 2 cents.
--
Florian

  reply	other threads:[~2013-04-03 15:23 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <863434221.7624846.1364452822093.JavaMail.root@redhat.com>
2013-03-28  6:40 ` s390x: kernel BUG at fs/ext4/inode.c:1591! CAI Qian
2013-03-28  6:40   ` CAI Qian
2013-03-28  9:44   ` CAI Qian
2013-03-28  9:44     ` CAI Qian
2013-03-28 12:05   ` Theodore Ts'o
2013-03-28 14:56     ` Dmitry Monakhov
2013-03-29  8:53       ` CAI Qian
2013-03-29 10:08         ` Dmitry Monakhov
2013-03-29  9:27     ` CAI Qian
2013-04-01  6:07       ` Dmitry Monakhov
2013-04-01  6:07         ` Dmitry Monakhov
2013-04-01  6:30         ` CAI Qian
2013-04-01  6:30           ` CAI Qian
2013-04-01  6:56           ` Dmitry Monakhov
2013-04-01  6:56             ` Dmitry Monakhov
2013-04-02  4:06             ` bisected! (WAS Re: s390x: kernel BUG at fs/ext4/inode.c:1591!) CAI Qian
     [not found]               ` <alpine.DEB.2.10.1304012249440.5874@trent.utfs.org>
2013-04-02  9:47                 ` s390x: kernel BUG at fs/ext4/inode.c:1591! (powerpc too!) Dmitry Monakhov
2013-04-02 12:33                   ` Zheng Liu
     [not found]                     ` <alpine.DEB.2.10.1304021202100.13746@trent.utfs.org>
2013-04-02 19:49                       ` Dmitry Monakhov
2013-04-02 19:49                         ` Dmitry Monakhov
     [not found]                   ` <alpine.DEB.2.10.1304020955280.13746@trent.utfs.org>
2013-04-02 17:19                     ` Dmitry Monakhov
     [not found]                   ` <alpine.DEB.2.10.1304021430480.13746@trent.utfs.org>
2013-04-02 22:05                     ` Dmitry Monakhov
     [not found]                       ` <alpine.DEB.2.10.1304021611020.13746@trent.utfs.org>
2013-04-03  8:52                         ` Dmitry Monakhov
2013-04-03  9:53                           ` Dmitry Monakhov
2013-04-03 10:22                             ` Zheng Liu
2013-04-03 12:20                               ` [PATCH] ext4: fix a big-endian bug when an extent is zeroed out Theodore Ts'o
2013-04-03 12:29                                 ` Dmitry Monakhov
2013-04-03 14:34                                 ` Eric Whitney
2013-04-03 14:41                                   ` Theodore Ts'o
2013-04-03 15:23                                     ` Florian Fainelli [this message]
2013-04-03 15:23                                       ` Florian Fainelli
2013-04-09  3:05                                     ` CAI Qian
2013-04-20 15:19                                       ` Theodore Ts'o
2013-04-22  3:40                                         ` CAI Qian
2013-04-22 10:04                                         ` Christian Borntraeger
2013-04-03 11:02                             ` s390x: kernel BUG at fs/ext4/inode.c:1591! (powerpc too!) Dmitry Monakhov
     [not found]                               ` <alpine.DEB.2.10.1304030935230.13746@trent.utfs.org>
2013-04-03 16:50                                 ` Dmitry Monakhov
2013-04-03 16:52                                 ` Zheng Liu
2013-04-02 10:01               ` bisected! (WAS Re: s390x: kernel BUG at fs/ext4/inode.c:1591!) Dmitry Monakhov
     [not found]                 ` <876098945.1097253.1364961617725.JavaMail.root@redhat.com>
2013-04-03  7:14                   ` CAI Qian
2013-04-03  7:51                     ` Dmitry Monakhov
2013-04-03  8:09                   ` Lukáš Czerner

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