linux-kernel - Re: how to check how much data left to sync to disk at umount?

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Message-ID: <20150917015052.GY26895@dastard>
Date:	Thu, 17 Sep 2015 11:50:52 +1000
From:	Dave Chinner <david@...morbit.com>
To:	Jeff Chua <jeff.chua.linux@...il.com>
Cc:	lkml <linux-kernel@...r.kernel.org>
Subject: Re: how to check how much data left to sync to disk at umount?

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@...morbit.com
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