Re: [PATCH v7u1 26/31] x86: Don't enable swiotlb if there is notenough ram for it

From: Yinghai Lu
Date: Fri Jan 04 2013 - 23:10:20 EST

On Fri, Jan 4, 2013 at 6:02 PM, Shuah Khan <shuahkhan@xxxxxxxxx> wrote:
> I applied your patch to 3.6.11 and changed the panic() to pr_info()
> and also changed enough_mem_for_swiotlb() to always return false to
> simulate not enough memory condition as this system does have enough
> memory.
> So at least on this AMD system, your patch will result in a panic.

ok, thanks for testing.

if enough_mem_for_swiotlb() return false really, allocating buffer
for swiotlb with bootmem would panic already, right?

so this patch just delay the panic a while for AMD system with
unhandled devices by IOMMU.


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