On Wed, 2017-11-22 at 17:32:07 UTC, Mahesh J Salgaonkar wrote: > From: Mahesh Salgaonkar <mah...@linux.vnet.ibm.com> > > Rebooting into a new kernel with kexec fails in trace_tlbie() which is > called from native_hpte_clear(). This happens if the running kernel has > CONFIG_LOCKDEP enabled. With lockdep enabled, the tracepoints always > execute few RCU checks regardless of whether tracing is on or off. > We are already in the last phase of kexec sequence in real mode with > HILE_BE set. At this point the RCU check ends up in RCU_LOCKDEP_WARN and > causes kexec to fail. > > Fix this by not calling trace_tlbie() from native_hpte_clear(). > > Signed-off-by: Mahesh Salgaonkar <mah...@linux.vnet.ibm.com> > Reported-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com> > Suggested-by: Michael Ellerman <m...@ellerman.id.au> > Acked-by: Naveen N. Rao <naveen.n....@linux.vnet.ibm.com>
Applied to powerpc fixes, thanks. https://git.kernel.org/powerpc/c/a3961f824cdbe7eb431254dc7d8f6f cheers
