Hi Qu, On 22/04/2019 02:14, Qu Wenruo wrote: > On 2019/4/21 下午9:28, Matthew Wilcox wrote: >> On Sun, Apr 21, 2019 at 05:12:50PM +0800, Qu Wenruo wrote: >>> On 2019/4/21 下午4:20, Qu Wenruo wrote: >>>> Just hit one crash on v5.1-rc5 kernel, on ext4 filesystem. >>> >>> Well, also hit the same one in v5.0.8 kernel. >>> >>> Exact the same backtrace. >>> >>> Really not sure which part is to blame, ARM or ext4? >> >> You probably have faulty hardware: > I tried memtester, and kernel also crashed. > > Maybe it's really faulty memory or I'm using wrong memory speed. As another option: there may be no memory at this physical address. If your board only has 1G of memory, but the bootloader/DT is reporting 2G, you could see SError like this (assuming this is the first access to that page). SError can be a fatal interrupt from the hardware, its also how the CPU tells us about 'asynchronous external abort'. In this case it could be an attempt to access a physical address where nothing exists. Thanks, James
