Am Freitag, 19. Februar 2010 11:12:22 schrieb Torgny Johansson: > Hi! > > Is there any way to set the usb autosudpend idle-delay time in smaller > increments than 1s? We're seeing some issues with a 0s delay (not > investigated much yet) but all is good with a delay of 1s. 0s is dangerous because you cannot be sure all transfered data has been processed. Currently the granularity is in seconds without a way around that. > We're curious if there's a way to finetune the delay or if there's some > obvious reason for having 1s increments that we're not aware of? Maybe > the gain of having finer grained control is negligable? There's no obvious reason to give the delay in seconds. There is an obvious reason to suspect that a delay of 0 will fail on many devices. There must be a lower limit that is device specific. We are pretty sure it is below 1s. The original idea was that anything lower than 1s would not make a significant difference. That however is an assumption without experimental verification. Shall I understand this as a request for a patch that allows milisecond resolution? Regards Oliver PS: You might find it helpful to read an article on last week's lwn.net which I describe USB autosuspend in. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
