linux-ext4 - Re: freeze

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Message-ID: <CAD6i1fKpWZVbL4gS1ui7GvF81S+SAduckXeWoApwH=KgKuiU9g@mail.gmail.com>
Date:	Mon, 8 Oct 2012 22:05:38 +0530
From:	Prashant Shah <pshah.mumbai@...il.com>
To:	Jan Kara <jack@...e.cz>
Cc:	Eric Sandeen <sandeen@...hat.com>, linux-ext4@...r.kernel.org
Subject: Re: freeze_bdev hangs

Hi,

On Mon, Oct 8, 2012 at 9:49 PM, Jan Kara <jack@...e.cz> wrote:
>   And what tool are you using for monitoring?

I am using printk(). A custom module that changes the make_request_fn
of the block device to a custom callback. In the callback I am
printing the request bio details and passing the bio back to the
original make_request_fn.

Regards.
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