linux-ext4 - Re: git svn clone freezes the pc on ext4

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Message-ID: <4AB2474D.2000908@redhat.com>
Date:	Thu, 17 Sep 2009 09:27:25 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Jens Kubieziel <maillist@...ieziel.de>
CC:	linux-ext4@...r.kernel.org
Subject: Re: git svn clone freezes the pc on ext4

Jens Kubieziel wrote:
> Hi,
> 
> I recently changed my /home-partition to ext4 and wanted to clone a SVN
> repository. After calling "git svn clone https://...", git began
> fetching old revisions and at every try the complete pc freezes. It
> doesn't respond to any keyboard presses nor to SysRq. I tried the same
> command on different filesystems (ext3, reiser) and with different git
> versions. Only git on ext4 causes this freeze.
> 
> The system logs have no uncommon messages. I found only:
> EXT4 FS on sda3, internal journal on sda3:8
> EXT4-fs: deleayed allocation enabled
> EXT4-fs: file extents enabled
> EXT4-fs: mballoc enabled
> EXT4-fs: mounted filesystem with ordered data mode
> Linux version is 2.6.28-15 (default installation from Ubuntu jaunty).
> 
> How can I find out more about this freeze? Is maybe something known what
> causes this? Thanks for any hints.

I'd try doing the test on the main console (not X), turn dmesg up (dmesg
-n 8) and make sure sysrq is enabled; I'd try sysrq-t or sysrq-w to get
stack traces for processes.  If really and truly none of that works and
you get no messages, that sounds like a tough one to sort out.

.28 is getting a bit old, I'd probably try a newer upstream kernel as well.

-Eric
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