linux-kernel - Re: [PATCH 3/6] drm/imx: Build monolithic driver

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Message-ID: <1443186558.4397.72.camel@pengutronix.de>
Date:	Fri, 25 Sep 2015 15:09:18 +0200
From:	Philipp Zabel <p.zabel@...gutronix.de>
To:	Thierry Reding <thierry.reding@...il.com>
Cc:	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/6] drm/imx: Build monolithic driver

Am Freitag, den 25.09.2015, 14:17 +0200 schrieb Thierry Reding:
> I think you gain much less by splitting up than you realize. Compare
> this from before the series:
> 
> 	$ du -ch drivers/gpu/drm/imx/*.ko
> 	8.0K    drivers/gpu/drm/imx/dw_hdmi-imx.ko

Oh right, I didn't realize that this is just the shim. The bulk of the
HDMI driver is in bridge/dw_hdmi.ko.

> 	16K     drivers/gpu/drm/imx/imxdrm.ko
> 	16K     drivers/gpu/drm/imx/imx-ipuv3-crtc.ko
> 	12K     drivers/gpu/drm/imx/imx-ldb.ko
> 	12K     drivers/gpu/drm/imx/imx-tve.ko
> 	8.0K    drivers/gpu/drm/imx/parallel-display.ko
> 	72K     total
[...]
> with this after the series:
> 
> 	$ du -ch drivers/gpu/drm/imx/*.ko
> 	44K     drivers/gpu/drm/imx/imx-drm.ko
> 	44K     total
[...]
> There are other things to consider as well, such as the additional
> memory overhead caused by merely having multiple modules, or all of the
> exported functions that unnecessarily clutter up the symbol table, and
> which end up slowing down every symbol lookup.

Thanks, can't argue with those numbers.
I'll queue patches 3 and 4 for imx-drm.

regards
Philipp

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