[OpenWrt-Devel] [PATCH] layerscape: kernel: cma: increase CMA buffer size from 16 to 32MB

mail at adrianschmutzler.de mail at adrianschmutzler.de
Mon May 25 06:22:54 EDT 2020

> -----Original Message-----
> From: Linus Lüssing [mailto:ll at simonwunderlich.de]
> Sent: Montag, 25. Mai 2020 12:14
> To: mail at adrianschmutzler.de; 'Linus Lüssing' <linus.luessing at c0d3.blue>;
> openwrt-devel at lists.openwrt.org
> Cc: 'Sven Eckelmann' <sven at narfation.org>
> Subject: Re: [OpenWrt-Devel] [PATCH] layerscape: kernel: cma: increase
> CMA buffer size from 16 to 32MB
> On 25/05/2020 11:25, mail at adrianschmutzler.de wrote:
> [...]
> > Despite, armv7 uses 64 MB ?
> Hm, you're right. Not sure, I wouldn't increase the CMA buffer more as
> needed though, as any unused CMA space is basically wasted, it can't be
> used for caches etc right now.
> But I can increase it to 64 MB to not divert from armv7 if that's preferred. As
> all layerscape boards usually come with a large amount of RAM, I assume?

Unfortunately, I cannot comment on this architecture at all, I just made the observation when looking at it.
Maybe somebody else can comment on that.

Note that we just removed 4.14 support completely for this target, so you will only have to touch 5.4 now.



> Regards, Linus
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