Messages in this thread |  | | Date | Sat, 14 Sep 2002 21:16:21 -0700 (PDT) | From | Andre Hedrick <> | Subject | Re: Possible bug and question about ide_notify_reboot in 2.4.19 |
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On Sat, 14 Sep 2002, Alex Davis wrote:
> --- Andre Hedrick <andre@linux-ide.org> wrote: > > > > Hi Alex, > > > > We (T13 Standards) only recently required (shall) all non-packet device to > > support flush cache. No where does it state that a device supporting PM > > for a standby (shall), the key word here is "shall", issue a flush-cache. > I am assuming that a hard drive is a non-packet device. Let me make sure I'm
Today, yes ... In the past no. There are a handfull of these strange beasts which still exists.
> interpreting this correctly: older ( and some current ) drives may flush cache > on standby/sleep; current and future drives may not. In addition, older drives
It means there are not rules (rules is a loose term) for how to do this in the standard.
> may not support the flush cache command.
There is supported v/s enabled, and these can be optional. Optional == (Mandatory Optional) because nobody wants to not have the feature ready or they will miss the sale.
> > I will not break support for older hardware, on a whim. > Not my intention.
Cool.
> > You said you can make a patch, please do so and apply it to your tree. > > Now, if you want the option, submit the patch for review. For two or > > three days there has been no patch to test. > Still testing locally. I also want to fix the code so that the flush is > done before the standby.
Wait, how did the order go south?
> > > > To be absolutely honest, I really do not like to give options in the > > kernel-config build which can cause backwards compatablity problems. > This wouldn't be a config option. You would have to modify ide.c by > hand to disable standby.
So a manual config option? That is more reasonable and not doable by accident.
Cheers,
Andre Hedrick LAD Storage Consulting Group
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