On Wed, 24 Feb 2016, Chen Yucong wrote: > diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c > index c832ef3..e4b6dec3 100644 > --- a/mm/memory_hotplug.c > +++ b/mm/memory_hotplug.c > @@ -1059,10 +1059,9 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ > > ret = memory_notify(MEM_GOING_ONLINE, &arg); > ret = notifier_to_errno(ret); > - if (ret) { > - memory_notify(MEM_CANCEL_ONLINE, &arg); > - return ret; > - } > + if (ret) > + goto failed_addition; > + > /* > * If this zone is not populated, then it is not in zonelist. > * This means the page allocator ignores this zone. > @@ -1080,12 +1079,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ > if (need_zonelists_rebuild) > zone_pcp_reset(zone); > mutex_unlock(&zonelists_mutex); > - printk(KERN_DEBUG "online_pages [mem %#010llx-%#010llx] failed\n", > - (unsigned long long) pfn << PAGE_SHIFT, > - (((unsigned long long) pfn + nr_pages) > - << PAGE_SHIFT) - 1); > - memory_notify(MEM_CANCEL_ONLINE, &arg); > - return ret; > + goto failed_addition; > } > > zone->present_pages += onlined_pages; > @@ -1118,6 +1112,13 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ > if (onlined_pages) > memory_notify(MEM_ONLINE, &arg); > return 0; > + > +failed_addition: > + pr_info("online_pages [mem %#010llx-%#010llx] failed\n", > + (unsigned long long) pfn << PAGE_SHIFT, > + (((unsigned long long) pfn + nr_pages) << PAGE_SHIFT) - 1); > + memory_notify(MEM_CANCEL_ONLINE, &arg); > + return ret; > } > #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ > Please explain how the conversion from KERN_DEBUG to KERN_INFO level is better? If the onlining returns an error value, which it will, why do we need to leave an artifact behind in the kernel log that it failed? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>