On Thu, Jun 29, 2017 at 1:41 PM, Eryu Guan <eg...@redhat.com> wrote: > On Thu, Jun 29, 2017 at 03:16:10AM +1000, Balbir Singh wrote: >> On Wed, Jun 28, 2017 at 6:32 PM, Eryu Guan <eg...@redhat.com> wrote: <snip> >> Thanks for the excellent bug report, I am a little lost on the stack >> trace, it shows a bad page access that we think is triggered by the >> mmap changes? The patch changed the return type to integrate the call >> into trace-cmd. Could you point me to the tests that can help >> reproduce the crash. Could you also suggest how long to try the test >> cases for? > > Sorry, I should have provided it in the first place. It's as simple as > mounting an ext4 filesystem on my test ppc64le host, i.e. > > mkdir -p /mnt/ext4 > mkfs -t ext4 -F /dev/sda5 > mount /dev/sda5 /mnt/ext4 >
I tried this test a few times with the kernel and could not reproduce it. Could you please share the config and compiler details, I'll retry with -rc7. In the meanwhile, does enabling kmemleak, DEBUG_PAGE_ALLOC, slub/slab debug, list corruption, etc catch anything at the time of the corruption? Thanks, Balbir Singh.
