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[Xen-devel] Re: [RFC PATCH 26/35] Add Xen subarch reboot support

On 22 Mar 2006, at 08:40, Arjan van de Ven wrote:

+static int shutdown_process(void *__unused)
+       static char *envp[] = { "HOME=/", "TERM=linux",
+                               "PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL };
+       static char *restart_argv[]  = { "/sbin/reboot", NULL };
+       static char *poweroff_argv[] = { "/sbin/poweroff", NULL };

how is this function different from the generic one? If not, why aren't
you using the generic one?

The intent is to allow remote management tools to trigger a clean shutdown of the virtual machine. That requires us to notify to userspace, and this function does that by exec'ing one of the standard userspace programs. Given the trigger is received by the kernel in the first instance I don't know a better way of doing this. And if this is the best way, I don't think there is generic code in the kernel which does the same thing.

 -- Keir

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