linux-kernel - Re: PM / Suspend: Print wall time at suspend entry and exit

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Date:   Thu, 13 Jul 2017 10:54:08 +0200
From:   Pavel Machek <pavel@....cz>
To:     Mark Salyzyn <salyzyn@...roid.com>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Todd Poynor <toddpoynor@...gle.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <len.brown@...el.com>
Subject: Re: PM / Suspend: Print wall time at suspend entry and exit

Hi!

> >And userspace should not really be parsing kernel logs for time
> >keeping, right?
> Post-mortem, armed with user space logs in CLOCK_REALTIME (a choice that
> most want on Android Logging) and kernel logs, these messages are
> _invaluable_ in order to merge the kernel activities with user space. At
> runtime they help too, as there is some post-mortem activities on user space
> logging daemon startup.
> >The devices you are talking about... is any of them running something
> >close to mainline kernel, or is planned for merge? I'd like to get a
> >phone that is supported by mainline...
> 
> Android on hikey development board is running 4.9 kernel + Android patches
> (this is one of 'em), I _expect_ ToT will work. As for _real_ phones, you
> have to take that up with the vendors making the chips.

Well, there are real phones with mainline Linux: Nokia N900, N9, N950,
Motorola Droid 4.

Current kernel is 4.13, not v4.9.

Yes, Qualcomm is a problem. There are other vendors, you can get those
phones in retail. So no, I don't think android community is doing a
good job. I don't think it makes sense to merge patches that "help
debugging" when basic support is missing.

Best regards,

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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