On Mon, 12 Nov 2018, Mirela Simonovic wrote: > The rcu_barrier() has to be added to ensure that the per cpu area is > freed before a non-boot CPU tries to initialize it (_free_percpu_area() > has to be called before the init_percpu_area()). This scenario occurs > when non-boot CPUs are hot-unplugged on suspend and hotplugged on resume. > > Signed-off-by: Mirela Simonovic <mirela.simono...@aggios.com> > Signed-off-by: Saeed Nowshadi <saeed.nowsh...@xilinx.com>
Reviewed-by: Stefano Stabellini <sstabell...@kernel.org> > --- > xen/arch/arm/suspend.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/xen/arch/arm/suspend.c b/xen/arch/arm/suspend.c > index dae1b1f7d6..8e8e531d61 100644 > --- a/xen/arch/arm/suspend.c > +++ b/xen/arch/arm/suspend.c > @@ -133,6 +133,7 @@ static long system_suspend(void *data) > system_state = SYS_STATE_resume; > > resume_nonboot_cpus: > + rcu_barrier(); > enable_nonboot_cpus(); > thaw_domains(); > system_state = SYS_STATE_active; > -- > 2.13.0 > _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
