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Date:      Sun, 8 Nov 2015 03:18:26 +0000 (UTC)
From:      Big Whale <d0lph1n98@yahoo.com>
To:        Adrian Chadd <adrian.chadd@gmail.com>,  Constantinos Georgiades <csgeorgiades@gmail.com>
Cc:        "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>
Subject:   Re: Code contribution
Message-ID:  <2024364727.1157969.1446952707296.JavaMail.yahoo@mail.yahoo.com>
In-Reply-To: <CAJ-VmomsU2kNopGQa2scoTHro-c40oSgZ=0Lc17b3=ugPi9VQQ@mail.gmail.com>
References:  <CAJ-VmomsU2kNopGQa2scoTHro-c40oSgZ=0Lc17b3=ugPi9VQQ@mail.gmail.com>
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You also can start by subscribing to the correct mailing list, and always catch up with latest problem. See if you can contribute to any of them. Some might ask about their problem there.  


     On Sunday, November 8, 2015 12:35 AM, Adrian Chadd <adrian.chadd@gmail.com> wrote:
   

 Sure! Just ask on here and see who helps out! There are plenty of us
that are happy to help where we can!


-a


On 7 November 2015 at 06:53, Constantinos Georgiades
<csgeorgiades@gmail.com> wrote:
> Hello All,
>
> I am willing to contribute code in my free time for fun and experience.
>
> I am interested for some of the juniors kernel projects and
> particularly for the "Free old file descriptor tables".
>
> Contributing to userland projects is ok too.
> "Improve cron(8) and atrun(8)" seems nice project.
>
>
> I will probably need some help.
> Should i get a mentor?
>
> Regards,
> Constantinos
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	Sun, 08 Nov 2015 13:22:57 +0300
From: AlexHully <deco33000@yandex.com>
To: freebsd-hackers@freebsd.org
Subject: dma
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Hi,

I would like a clarification for dma.

The context: most dma capable devices have 32 bits address range.
Is it correct that, if there was no 3G/1G mapping in the kernel, or that kernel low memory could map 4Gb memory, one could choose any free addresses in that low memory to set up a dma buffer?

That would avoid all the mapping hassle, and performance cost associated.

Thanks


--š
Alex
help

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