Fixing suspend timer: where to stash io counter stats?

[Phillip Susi]

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On 05/14/2014 11:25 AM, Martin Pitt wrote:
> Already answered on IRC, but for the record: the private struct 
> _UDisksLinuxDriveAta in src/udiskslinuxdriveata.c seems quite 
> appropriate for this. In there you most probably won't even need
> new internal API as all the SMART stuff shoudl be contained in
> that object.
> 
> Thanks for looking into this!

So I prepared a patch to address this by using
g_udev_device_get_sysfs_attr() to read the io stats counters and store
them in that struct and behave as if the disk is sleeping if there has
been no change.  The problem is that it seems to cache the value and
not read it from sysfs again on subsequent calls, so it always thinks
the disk has seen no IO.  How can you make it stop caching and
actually re-read the sysfs file?



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