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Date:   Fri, 15 May 2020 16:36:22 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Saravana Kannan <saravanak@...gle.com>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Len Brown <lenb@...nel.org>,
        Android Kernel Team <kernel-team@...roid.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Ji Luo <ji.luo@....com>
Subject: Re: [PATCH v1 0/4] Optimize fw_devlink parsing

On Fri, May 15, 2020 at 01:52:37AM -0700, Saravana Kannan wrote:
> On Thu, May 14, 2020 at 10:35 PM Saravana Kannan <saravanak@...gle.com> wrote:
> >
> > When fw_devlink is enabled on hardware with a large number of device
> > tree nodes, the initial device addition done in
> > of_platform_default_populate_init() can be very inefficient. This is
> > because most devices will fail to find all their suppliers when they are
> > added and will keep trying to parse their device tree nodes and link to
> > any newly added devices
> >
> > This was an item on my TODO list that I'm finally getting around to. On
> > hardware I'm testing on, this saved 1.216 _seconds_!
> 
> Correction. It went from 1.216 _seconds_ to 61 _milliseconds_! So
> about 95% reduction in time.

Nice speedups!  All now queued up, thanks.

greg k-h

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