On Tue, Mar 28, 2017 at 10:09:44AM -0700, Tony Lindgren wrote:
> OK so how about the following to disable kexec for Andrew's
> test case?
That won't work - the hook you're using is to decide whether a particular
CPU (normally the boot CPU) can be hot-plugged. It isn't expected to
return false for all.
The code in question is:
/*
* Validate that if the current HW supports SMP, then the SW supports
* and implements CPU hotplug for the current HW. If not, we won't be
* able to kexec reliably, so fail the prepare operation.
*/
if (num_possible_cpus() > 1 && platform_can_secondary_boot() &&
!platform_can_cpu_hotplug())
return -EINVAL;
and:
int platform_can_cpu_hotplug(void)
{
#ifdef CONFIG_HOTPLUG_CPU
if (smp_ops.cpu_kill)
return 1;
#endif
return 0;
}
Platforms don't get a say in that, other than whether they implement
the operations necessary for hotplug.
--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
