On Tuesday, December 9, 2008 you wrote: > On Mon, Dec 8, 2008 at 2:55 PM, Yuri Tikhonov <yur@xxxxxxxxxxx> 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? Yep. It uses 36-bit addressing, so this CONFIG is turned on. > 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). On ppc440spe we have 8KB stack, so the things are not worse than on 32-bit archs with 4KB stack. Thus, I guess no changes to md are required because of this patch. Right? Regards, Yuri -- Yuri Tikhonov, Senior Software Engineer Emcraft Systems, www.emcraft.com -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
