On Wed, Dec 16, 2015 at 11:43 PM, Arnd Bergmann <arnd@xxxxxxxx> wrote: > On Wednesday 16 December 2015 14:55:43 Andre Przywara wrote: >> Using the plain multi_v7_defconfig (which doesn't have LPAE and makes me >> loose half of the RAM on that box) didn't show the bug so far. >> One of the effects of turning on LPAE is that dma_addr_t and phys_addr_t >> turn to 64-bit, with long, int and void* still being 32-bit. Can you >> think of any issues that could be related to that? >> > > Another difference between the platforms is highmem. On Midway, > almost all of RAM is highmem, which needs a lot of special handling > that we don't need on platform with less RAM. Yeah, block bounce can be triggered for highmem generally. > > To rule out both of highmem and LPAE, it might be interesting to > test again on Midway with CONFIG_HIGHMEM and CONFIG_LPAE disabled. > This will limit the RAM to 768MB, but if the bug still shows up, > you know it's something else. > > Arnd > -- > To unsubscribe from this list: send the line "unsubscribe linux-block" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
