Re: bigphysarea in 2.2

Alessandro Rubini (rubini@pop.systemy.it)
Thu, 23 Apr 1998 19:30:22 +0200

> But it seems from recent discussions that a lobbying
> group tries to incorporate it in the mainstream kernel. ;) I vote for
> it, as this patch is more and more necessary (and because it seems to be
> _the_ solution for big allocations).

IMHO, big allocation are quite special needs. If the bigphysarea approach
has something bad, I'd keep it out of the mainstream sources. However,
I never looked in it -- my fault.

In my own drivers (GPL'd modules, not in the kernel tarball) I ask the
user to specify "mem=31M" to reserve the top 1M of RAM for DMA. This
way I can have a 100MB buffer on a 128MB box without any trouble nor
kernel patching. I think this is the best solution to the problem. Sure
I can be wrong

/alessandro

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