Re: Calling suspend() in halt/restart/shutdown -> not a good idea

On Tue, 2005-08-02 at 16:45 +0200, Pavel Machek wrote:
> Hi!
> 
> > >> Why are we calling driver suspend routines in these ? This is _not_
> > >
> > > Well, reason is that if you remove device_suspend() you'll get
> > > emergency hard disk park during powerdown. As harddrives can survive
> > > only limited number of emergency stops, that is not a good idea.
> > 
> > Then the practical question is: do we suspend the disk by
> > calling device_suspend() for every device.  Or do we modify
> > the ->shutdown() method for the disk.
> 
> The additional data in pm_message_t are usefull, and sharing code
> between suspend-to-ram and suspend-to-disk is usefull => option #1...

No.

Ben.


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References:
- Calling suspend() in halt/restart/shutdown -> not a good idea
  - From: Benjamin Herrenschmidt <[email protected]>
- Re: Calling suspend() in halt/restart/shutdown -> not a good idea
  - From: Pavel Machek <[email protected]>
- Re: Calling suspend() in halt/restart/shutdown -> not a good idea
  - From: [email protected] (Eric W. Biederman)
- Re: Calling suspend() in halt/restart/shutdown -> not a good idea
  - From: Pavel Machek <[email protected]>

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