Am Mittwoch, 4. Juli 2007 schrieb Matthew Garrett:
> On Wed, Jul 04, 2007 at 10:38:47AM -0400, Alan Stern wrote:
>
> > Okay, I agree that (1) can be handled without too much effort. But
> > doing it adds an extra test to _every_ driver's I/O pathway. Freezing
> > userspace does not incur all this additional overhead.
>
> For runtime PM to work it's already necessary to have a test in that
> path to check if the device is suspended. I can't see how this adds any
> overhead to the common case.
No,
you just make sure the device reports to upper layers when it might
be busy. The USB layer manages this quite well without burdening
the common case.
Regards
Oliver
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
