David Vrabel <david.vra...@citrix.com> writes: > On 22/12/15 16:32, Vitaly Kuznetsov wrote: >> @@ -1292,6 +1304,11 @@ int __ref add_memory_resource(int nid, struct >> resource *res) >> /* create new memmap entry */ >> firmware_map_add_hotplug(start, start + size, "System RAM"); >> >> + /* online pages if requested */ >> + if (online) >> + online_pages(start >> PAGE_SHIFT, size >> PAGE_SHIFT, >> + MMOP_ONLINE_KEEP); > > This will cause the Xen balloon driver to deadlock because it calls > add_memory_resource() with the balloon_mutex locked and the online page > callback also locks the balloon_mutex.
Currently xen ballon driver always calls add_memory_resource() with online=false so this won't happen. -- Vitaly -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
