Messages in this thread | | | Subject | Re: [PATCH] xen/x86: fix cpu hotplug | From | Boris Ostrovsky <> | Date | Tue, 18 Jul 2017 11:05:18 -0400 |
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On 07/05/2017 10:05 AM, Juergen Gross wrote: > Commit dc6416f1d711eb4c1726e845d653235dcaae12e1 ("xen/x86: Call > cpu_startup_entry(CPUHP_AP_ONLINE_IDLE) from xen_play_dead()") > introduced an error leading to a stack overflow of the idle task when > a cpu was brought offline/online many times: by calling > cpu_startup_entry() instead of returning at the end of xen_play_dead() > do_idle() would be entered again and again. > > Don't use cpu_startup_entry(), but cpuhp_online_idle() instead allowing > to return from xen_play_dead(). > > Cc: <stable@vger.kernel.org> # 4.12 > Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
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