On Thu, 24 Sep 2015, Fu, Zhonghui wrote: > >> Enable hid device to suspend/resume asynchronously. This can improve > >> system suspend/resume speed. > > How well was this tested? > > > > Power management is notorious for not being really in excellent shape on > > many HID devices. > > > > So I'd like to be careful. > I were on leave these days, so sorry for late reply. > > This can reduce system suspend/resume time about 20ms, from 1030ms to > 1010ms on ASUS T100TA machine. Although the improvement is not very > significant, but this can let your parent/child device suspend/resume > more asynchronously and take advantage of multicore to improve overall > system suspend/resume speed. > > I have resent this patch with updated commit message - "[PATCH v2] hid: > enable hid device to suspend/resume asynchronously".
Is there any reason why not enable this from userspace via sysfs instead, based on whitelist on known-to-be-well-behaved devices, from udev? I am really careful when it comes to enabling features like this (especially given the state of PM support on some low-end devices) globally. Thanks, -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
