Messages in this thread |  | | | From | (Alan Cox) | | Subject | Re: APM support for avoiding waking up laptops every few seconds? | | Date | Sun, 3 Aug 1997 21:57:07 +0100 (BST) |
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> 1 Just before the APM spins down the disk, a sync should be done. > Though i'm not actually sure there's any way to request such notice.
APM doesn't spin the disk down in general. APM just set the disks own spindown configuration at boot.
> 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.
Alan
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