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Date:	Thu, 28 Oct 2010 16:37:06 -0400
From:	Ted Ts'o <tytso@....edu>
To:	sedat.dilek@...il.com
Cc:	Markus Trippelsdorf <markus@...ppelsdorf.de>,
	LKML <linux-kernel@...r.kernel.org>, linux-ext4@...r.kernel.org,
	sfr@...b.auug.org.au, Arnd Bergmann <arnd@...db.de>,
	Avinash Kurup <kurup.avinash@...il.com>
Subject: Re: [next-20101038] Call trace in ext4

On Thu, Oct 28, 2010 at 10:15:00PM +0200, Sedat Dilek wrote:
> 
> I created a new ext4.ko via "make M=fs/ext4" in the build-dir and
> copied the the kernel-module to /lib/modules/$(uname
> -r)/kernel/fs/ext4/, is that not enough?

It might not be.  Some distributions include modules in the initial
ramdisk, and load the module from the initrd, simply dropping the
module in /lib/modules/<kver>/... might not be enough.  So recreating
the initrd and then rebooting might be enough.

Certainly if you drop it there on a running kernel, if you don't
unload the module (before unmounting all of your ext4 file systems),
and then reload the module, *definitely* just copying a module into
/lib/modules.... without making sure the module is reloaded, you'll
still have the old module.

						- Ted
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