> > 2 Whenever the disk is spun down sys_bdflush should be a noop
> > The idea being that eventually a read will wake up the disk and all
> > those dirty buffers will be flushed within five seconds. This will
> > suck up a lot buffers but if the free list is empty refill_freelist
> > will still work fine.
>
> And if your machine crashes in that state you might lose hours of work.
Better yet, change the flush buffer interval from 30 seconds to 5 or 10
minutes.
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