Re: [PATCH] net/macb: Use dmapool to align descriptors on 64bits

On Mon, 2012-12-03 at 13:15 +0100, Nicolas Ferre wrote:

Depending on datapath, some revisions of GEM need
64bits aligned descriptors. Use dmapool to allocate
these descriptors.
Note that different size between RX and TX rings
leads to the creation of two pools.

Signed-off-by: Nicolas Ferre <redacted>

[...]

dma_alloc_coherent() allocates whole pages, which I think is quite
enough alignment.  You can't save memory by doing this, since each pool
needs at least one page.  So what is this change meant to achieve?

Ben.

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Ben Hutchings, Staff Engineer, Solarflare
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