Question on bdflush

[Zhiruo Cao]

Hello,

Why does bdflush (kupdated and kflushed) writes to disk periodically even
though the system is apparently idle.  I think if no more new buffers
becomes dirty, kflushed show not write anything to disk.   I'm working
on a notebook, and I found the periodic disk access is very annoying and
consuming a lot of power.

Thanks!

Joe

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