* how to check how much data left to sync to disk at umount?
@ 2015-09-07 5:29 Jeff Chua
2015-09-17 1:50 ` Dave Chinner
0 siblings, 1 reply; 3+ messages in thread
From: Jeff Chua @ 2015-09-07 5:29 UTC (permalink / raw)
To: lkml
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?
Thanks,
Jeff.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: how to check how much data left to sync to disk at umount?
2015-09-07 5:29 how to check how much data left to sync to disk at umount? Jeff Chua
@ 2015-09-17 1:50 ` Dave Chinner
2015-09-18 11:36 ` Jeff Chua
0 siblings, 1 reply; 3+ messages in thread
From: Dave Chinner @ 2015-09-17 1:50 UTC (permalink / raw)
To: Jeff Chua; +Cc: lkml
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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: how to check how much data left to sync to disk at umount?
2015-09-17 1:50 ` Dave Chinner
@ 2015-09-18 11:36 ` Jeff Chua
0 siblings, 0 replies; 3+ messages in thread
From: Jeff Chua @ 2015-09-18 11:36 UTC (permalink / raw)
To: Dave Chinner; +Cc: lkml
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
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2015-09-18 11:36 UTC | newest]
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2015-09-07 5:29 how to check how much data left to sync to disk at umount? Jeff Chua
2015-09-17 1:50 ` Dave Chinner
2015-09-18 11:36 ` Jeff Chua
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