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From: Eric Nelson <eric.nelson@boundarydevices.com>
To: video4linux-list@redhat.com
Subject: Contiguous memory allocations
Date: Fri, 02 Jul 2010 13:47:40 -0700	[thread overview]
Message-ID: <1278103660.6034.16.camel@localhost> (raw)

Does anyone know if there's a common infrastructure for allocation
of DMA'able memory by drivers and applications above the straight
kernel API (dma_alloc_coherent)?

I'm working with Freescale i.MX51 drivers to do 720P video 
input and output and the embedded calls to dma_alloc_coherent
fail except when used right after boot because of fragmentation.

I'm fighting the urge to write yet another special-purpose allocator
for video buffers thinking this must be a common problem with a
solution already, but I can't seem to locate one.

The closest thing I've found is the bigphysarea patch, which doesn't
appear to be supported or headed toward main-line.

Thanks in advance,


Eric Nelson


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             reply	other threads:[~2010-07-02 20:47 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-07-02 20:47 Eric Nelson [this message]
2010-07-05 10:10 ` Contiguous memory allocations Chris Simmonds
2010-07-05 14:27   ` Eric Nelson
2010-07-05 15:31     ` Chris Simmonds
2010-07-05 16:14       ` Eric Nelson

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