Re: [PATCH 4/4] USB: export autosuspend delay in sysfs
Oliver Neukum <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
Am Dienstag, 6. März 2007 16:50 schrieb Alan Stern: > On Tue, 6 Mar 2007, Oliver Neukum wrote: > Actually we have a single attribute, named "wakeup". If the descriptor > says that remote wakeup isn't available then the attribute file is empty > and is ro. If the descriptor says remote wakeup is available then the > attribute file is rw and contains either "enabled" or "disabled". > > That's how things have worked for several kernel releases. Oh, well. Is there a prize somewhere for overloading an attribute with most functions? We'll have to support the existing interface. > > > This makes me doubt that we should prevent the device from waking up when > > > an internal I/O request occurs. If the user really wants to prevent the > > > device from waking up, then he should prevent I/O requests. The means for > > > doing this will depend on the individual device. > > > > Provided the user is capable of preventing that. I don't think we can > > consider this self-evident. > > Perhaps. But think in terms of a power-management daemon. It should be > smart enough to do the right thing, even if the user isn't. But it should be able to run with minimum priviledges. > All right, maybe it wouldn't if you did it for a short time -- but then > what would be the point? Surely if you want to power down the network > interface and leave it that way, you must realize that you can't keep > live sessions bound to the interface. Why? A full suspension of the system does that and we should seek to be able to do the same. Regards Oliver ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel