On Thu, Jun 29, 2017 at 06:47:50PM +1000, Balbir Singh wrote: > 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.
Yes, it's not reproduced on every host, I'm not sure what makes my test host so unique yet. > Could you please share the config and compiler details, I'll retry with -rc7. [root@ibm-p8-03-lp6 ~]# gcc --version gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-16) Copyright (C) 2015 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. [root@ibm-p8-03-lp6 ~]# rpm -q gcc gcc-4.8.5-16.el7.ppc64le I attached kernel config file. > > In the meanwhile, does enabling kmemleak, DEBUG_PAGE_ALLOC, > slub/slab debug, list corruption, etc catch anything at the time of the > corruption? OK, I'll retry with a debug kernel and report back. Thanks, Eryu
config-ppc64le.bz2
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