On Sun, Nov 04, 2007 at 09:29:18PM +0100, Peter Zijlstra wrote: > > On Sat, 2007-11-03 at 12:48 -0700, Stephen Hemminger wrote: > > The sizeof(struct device) is way too big, especially in the network device > > case. > > We want to support 1000's of device's and the change from class_device to > > net_device has caused needless bloat. > > > > sizeof(struct device) = 272 > > sizeof(struct class_device) = 92 > > * not the class_id in class_device could also be removed or changed to > > a ptr, since it is redundant for net_devices. > > The thing that surprised me most was that it contains a struct > semaphore, Greg, is that really needed?
Yes, it serializes bind and unbind stuff for the device. There are comments about it in drivers/base/dd.c if you want to look into it. thanks, greg k-h - 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/
