linux-kernel - Re: [PATCH v2] Bluetooth: Deinline large functions

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Date:	Tue, 12 Apr 2016 09:14:50 -0700
From:	Joe Perches <joe@...ches.com>
To:	Denys Vlasenko <dvlasenk@...hat.com>,
	Johan Hedberg <johan.hedberg@...el.com>
Cc:	linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] Bluetooth: Deinline large functions

On Tue, 2016-04-12 at 18:08 +0200, Denys Vlasenko wrote:
> On 04/12/2016 05:50 AM, Joe Perches wrote:
> > 
> > On Mon, 2016-04-11 at 20:34 +0200, Denys Vlasenko wrote:
> > > 
> > > Fastest existing Bluetooth standard's top speed is 2.4 MB/s.
> > > It is way off from being CPU limited, no need to squeeze
> > > last few cycles by excessive inlining.
> > > 
> > > Size reduction is about 40k:
> > > 
> > >     text     data      bss       dec     hex filename
> > > 95943139 20860256 35991552 152794947 91b7743 vmlinux_before
> > > 95903714 20860256 35991552 152755522 91add42 vmlinux
> > defconfig?
> In defconfig, CONFIG_BT is not set, so there will be no change

Which is why I set it in the defconfig size I sent.

Also, you haven't responded at all to any performance decrease
by uninline for low power/low frequency SOC embedded uses.