Re: [PATCH 01/11] async_tx: don't use src_list argument of async_xor() for dma addresses

On Mon, Dec 8, 2008 at 2:55 PM, Yuri Tikhonov [off-list ref] wrote:

Using src_list argument of async_xor() as a storage for dma addresses
implies sizeof(dma_addr_t) <= sizeof(struct page *) restriction which is
not always true (e.g. ppc440spe).

ppc440spe runs with CONFIG_PHYS_64BIT?

If we do this then we need to also change md to limit the number of
allowed disks based on the kernel stack size.  Because with 256 disks
a 4K stack can be consumed by one call to async_pq ((256 sources in
raid5.c + 256 sources async_pq.c) * 8 bytes per source on 64-bit).

Regards,
Dan