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Date: Fri, 06 May 2011 19:21:46 +0300
From: Andriy Gapon <avg@FreeBSD.org>
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To: John Baldwin <jhb@FreeBSD.org>
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Cc: freebsd-current@FreeBSD.org, multimedia@FreeBSD.org
Subject: Re: dsp mmap change
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on 06/05/2011 16:00 John Baldwin said the following:
> On Friday, May 06, 2011 4:55:00 am Andriy Gapon wrote:
>>
>> I would like to ask for a review and/or testing of the following patch:
>> http://people.freebsd.org/~avg/dev_dsp_mmap.diff
>>
>> It's supposed to fix an issue described here:
>> http://lists.freebsd.org/pipermail/freebsd-multimedia/2011-
> February/011691.html
>>
>> In short, the following pseudo-code should do the right thing:
>> fd = open(/dev/dsp, O_RDWR);
>> mmap(PROT_READ, fd);
>> mmap(PROT_WRITE, fd);
> 
> Are the buffers statically allocated?

My reading of code indicates that the buffers are allocated on a sound driver
attach and freed when it's detaching.

-- 
Andriy Gapon