Date: Fri, 06 May 2011 19:21:46 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: John Baldwin <jhb@FreeBSD.org> Cc: freebsd-current@FreeBSD.org, multimedia@FreeBSD.org Subject: Re: dsp mmap change Message-ID: <4DC4201A.9050909@FreeBSD.org> In-Reply-To: <201105060900.08672.jhb@freebsd.org> References: <4DC3B764.4030801@FreeBSD.org> <201105060900.08672.jhb@freebsd.org>
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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
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