Hi, On 12/02/2013 03:27 PM, Alexander Graf wrote: > > On 02.12.2013, at 05:01, Preeti U Murthy <pre...@linux.vnet.ibm.com> wrote: > >> Hi, >> >> On 11/30/2013 11:15 PM, Alexander Graf wrote: >>> Hi Ben, >>> >>> With current linus master (3.13-rc2+) I'm facing an interesting issue with >> >> SMT disabling on p7. When I trigger the cpu offlining it works as expected, >> but after a few seconds the machine goes into an oops as you can see below. >>> >>> It looks like a null pointer dereference. >> >> tip/sched/urgent has the below fix. Can you please apply the following it and >> check if the issue gets resolved? A similar issue was reported earlier as > > I've disabled NO_HZ now on that machine which also "fixed" it for me. > Unfortunately I can't reboot that box for at least the next week now to test > whether the patch does fix the issue.
The commit 37dc6b50cee9 that has caused this regression is around NO_HZ. It decides when to kick nohz idle balancing. Regards Preeti U Murthy > > > Alex > _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
