On Thu, 5 Jul 2018 06:47:37 +0000 "Tian, Baofeng" <[email protected]> wrote:
> -----Original Message----- > From: Andrew Morton [mailto:[email protected]] > Sent: Tuesday, July 3, 2018 5:31 AM > To: Tian, Baofeng <[email protected]> > Cc: [email protected]; [email protected]; Zhuang, Qihua > <[email protected]> > Subject: Re: [PATCH] reboot: add reboot_panic parameter > > On Mon, 2 Jul 2018 02:20:59 +0000 "Tian, Baofeng" <[email protected]> > wrote: > > > This "reboot_panic" kernel cmdline parameter allow to change the > > reboot mode in case of panic only. It use the same format as the > > "reboot" parameter. > > Example, for cf9 warm reset in case of panic: reboot_panic=p,w > > currently it only support cold/warm reset in case of panic. > > Why should we do this? What are the benefits, what are the usecases, etc? > > Some user-facing documentation should clear that up. `grep -r reboot= > Documentation' will direct you to the appropriate places. > (top-posting repaired. Please don't top-post) > Hi, Morton "Andrew" :) > On android platform, if use adb reboot, it will automatically reboot with > cold reset. > cold reset will reset RAM and cause RAM lose data information, if we want to > enable some debug features > like pstore, and ramdump etc, warm reset is needed to keep RAM across reset > > So, we add this interface to allow people to set reboot as warm to get log > data across reset. > OK, sounds good. Please add this info to the changelog, add the user documentation and resend.
