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Date: Sun, 31 Aug 2014 15:32:19 -0700
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        Greg KH <gregkh@linuxfoundation.org>
CC: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
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Subject: Re: [RFC v1 0/3] driver-core: add asynch module loading support
References: <99jhsb6abtsilpt3j5nu991b.1409513632114@email.android.com>
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On 8/31/2014 1:06 PM, 吴章金 wrote:
> Hi, folks
>
> I'm back to this discussion,
>
> The original requirement of my first RFC patchset is mainly for Android Smartphone use case:
>
> 1. We want light on LCD and draw a logo immediately after power key press(don't consider uboot or lk biotloader here).
> 2. We want the whole kernel boot fast to give user the Android Launch deaktop
> 3. The modem initialization/reset is slow
> 4. The Touchpad firmware upgrade is slow
> 5. We have many cpu cores(up to 8 in latest exynos 5430 and MT6595...)
> 6. We have few schedulable/parallellizable threads
> 7. We compiled all of the modules in the kernel(stupid? avoid modprobe...but lose parallelization in userspace)
>
> So, I think about is that possible to async most of the probes, but still reserve the requred dependencies to let them still work as expected.

you can boot a whole kernel including all graphics in less than 0.5 seconds, even without this patchset.