On 11/16/2015 11:26 PM, Jiri Kosina wrote: > On Mon, 16 Nov 2015, Fu, Zhonghui wrote: > >> Hi Jiri, >> >> Any comments about this patch? >> >> After enabling the HID devices suspend/resume asynchronously on ASUS >> T100TA(Baytrail-T platform), the system suspend-to-idle/resume time is >> reduced about 20ms. Although this improvement is not very significant. >> But, if the suspend/resume operation of HID devices is very >> time-consuming on some other platforms, this patch can improve >> significantly system suspend/resume speed on these platforms. > Hi, > > I don't think the question I've raised at > > > http://lkml.kernel.org/r/alpine.lnx.2.00.1509251404130.30...@pobox.suse.cz > > has ever been answered or at least discussed ... ? Sorry for missing this mail.
At present, the file(/sys/.../power/async) can be used to enable one device suspend/resume asynchronously. My patch only changes the default value of this file from "disabled" to "enabled". The sole difference of asynchronous suspend/resume mode is that the suspend/resume operation of one device is carried out in a separate kernel thread, and PM core ensures all related dependency. I have verified this patch on some platforms, such as ASUS T100TA. Actually, many other devices have used this feature for a long time. Thanks, Zhonghui > -- 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/
