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

From	Jeff Chua <jeff.chua.linux@gmail.com>
Newsgroups	linux.kernel
Subject	Re: how to check how much data left to sync to disk at umount?
Date	2015-09-18 13:40 +0200
Message-ID	<qa2bf-1mt-3@gated-at.bofh.it> (permalink)
References	<q5XjQ-4JR-11@gated-at.bofh.it> <q9wEq-5yg-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

On Thu, Sep 17, 2015 at 9:50 AM, Dave Chinner <david@fromorbit.com> wrote:
> 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.

It be a big challenge if the SD write is not the only disk activity!

Jeff
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

Re: how to check how much data left to sync to disk at umount? Dave Chinner <david@fromorbit.com> - 2015-09-17 04:00 +0200
  Re: how to check how much data left to sync to disk at umount? Jeff Chua <jeff.chua.linux@gmail.com> - 2015-09-18 13:40 +0200

csiph-web