On 2015/2/13 6:24, Rafael J. Wysocki wrote: > On Thursday, February 12, 2015 12:48:06 PM Fu, Zhonghui wrote: >> On 2015/2/11 23:25, Rafael J. Wysocki wrote: >>> On Wednesday, February 11, 2015 10:43:13 PM Fu, Zhonghui wrote: >>>> From 2626594c03ca3b9884dd44073385c36f99a3651d Mon Sep 17 00:00:00 2001 >>>> From: Zhonghui Fu <zhonghui...@linux.intel.com> >>>> Date: Wed, 11 Feb 2015 16:20:21 +0800 >>>> Subject: [PATCH] PM-Trace: add pm-trace support for suspending phase >>> Can you please avoid putting the above header lines into your patches? >>> >>> The only one that may be necessary is the From: line, but that's only >>> needed if you submit from a different address. >>> >>> Also please don't send To: mailing lists. Use CC instead. In fact, there >>> should be *one* address in the To: field when you're submitting a patch: >>> The address of the maintainer you want to apply the patch for you. >> Thanks for your guidance, and I will re-send this patch. >> >>>> Occasionally, the system can't come back up after suspend/resume >>>> due to problems of device suspending phase. This patch make >>>> PM_TRACE infrastructure cover device suspending phase of >>>> suspend/resume process, and the information in RTC can tell >>>> developers which device suspending function make system hang. >>> Do you have any examples of when this helped and no other debug methods did? >>> >>> It seems odd to me that no one has ever asked for this for several years and >>> now you need it. >> We ever run into some system hang during suspending some devices on >> BayTrail-T >> platform such as DMA, audio, etc. So, extending PM-Trace to suspend phase >> should >> be helpful. > Well, did you actually use this particular patch for debugging that? Yes, I ever used this method to debug suspending process of some devices.
BTW, I have re-sent this patch with -M so that the rename and changes can be reviewed much easier. The subject is "[PATCH v2] PM-Trace: add pm-trace support for suspending phase". Thanks, Zhonghui > > Rafael > > -- > 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/ -- 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/
