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Date: Thu, 17 Sep 2015 11:50:52 +1000
From: Dave Chinner <david@fromorbit.com>
To: Jeff Chua <jeff.chua.linux@gmail.com>
Cc: lkml <linux-kernel@vger.kernel.org>
Subject: Re: how to check how much data left to sync to disk at umount?
Message-ID: <20150917015052.GY26895@dastard>
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On Mon, Sep 07, 2015 at 01:29:33PM +0800, Jeff Chua wrote:
> When umount a slow device such as an SD card, the command will take a
> while to run depending on how much data is left to write to the
> device. Is there way to check how much data is remaining waiting to
> write to the device?

$ grep "Dirty\|Writeback" /proc/meminfo

And infer from that.

-Dave.
-- 
Dave Chinner
david@fromorbit.com