diff options
| author |   Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2018-04-19 12:34:06 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2018-05-03 22:32:27 +1000 |
| commit | 88b1a8547f4c00e55d54e081fc15e3980debf5c1 (patch) | |
| tree | ef2bec6859a6a8b10db4517ec9d919a119ac7c74 /scripts/patch-kernel | |
| parent | powerpc64/ftrace: Disable ftrace during kvm entry/exit (diff) | |
powerpc64/kexec: Hard disable ftrace before switching to the new kernel
If function_graph tracer is enabled during kexec, we see the below
exception in the simulator:
root@(none):/# kexec -e
kvm: exiting hardware virtualization
kexec_core: Starting new kernel
[ 19.262020070,5] OPAL: Switch to big-endian OS
kexec: Starting switchover sequence.
Interrupt to 0xC000000000004380 from 0xC000000000004380
** Execution stopped: Continuous Interrupt, Instruction caused exception, **
Now that we have a more effective way to completely disable ftrace on
ppc64, let's also use that before switching to a new kernel during
kexec.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'scripts/patch-kernel')
0 files changed, 0 insertions, 0 deletions