The patch titled
Subject: trace/events/kmem: don't call page_to_pfn() if page is NULL
has been added to the -mm tree. Its filename is
trace-events-kmem-dont-call-page_to_pfn-if-page-is-null.patch
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------------------------------------------------------
From: Wen Congyang <wency@xxxxxxxxxxxxxx>
Subject: trace/events/kmem: don't call page_to_pfn() if page is NULL
When allocating memory fails, page is NULL. page_to_pfn() will
cause the kernel panicked if we don't use sparsemem vmemmap.
Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx>
Reviewed-by: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/trace/events/kmem.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN include/trace/events/kmem.h~trace-events-kmem-dont-call-page_to_pfn-if-page-is-null include/trace/events/kmem.h
--- a/include/trace/events/kmem.h~trace-events-kmem-dont-call-page_to_pfn-if-page-is-null
+++ a/include/trace/events/kmem.h
@@ -214,7 +214,7 @@ TRACE_EVENT(mm_page_alloc,
TP_printk("page=%p pfn=%lu order=%d migratetype=%d gfp_flags=%s",
__entry->page,
- page_to_pfn(__entry->page),
+ __entry->page ? page_to_pfn(__entry->page) : 0,
__entry->order,
__entry->migratetype,
show_gfp_flags(__entry->gfp_flags))
@@ -240,7 +240,7 @@ DECLARE_EVENT_CLASS(mm_page,
TP_printk("page=%p pfn=%lu order=%u migratetype=%d percpu_refill=%d",
__entry->page,
- page_to_pfn(__entry->page),
+ __entry->page ? page_to_pfn(__entry->page) : 0,
__entry->order,
__entry->migratetype,
__entry->order == 0)
_
Patches currently in -mm which might be from wency@xxxxxxxxxxxxxx are
origin.patch
cpu_hotplug-unmap-cpu2node-when-the-cpu-is-hotremoved.patch
cpu_hotplug-unmap-cpu2node-when-the-cpu-is-hotremoved-fix.patch
acpi_memhotplugc-fix-memory-leak-when-memory-device-is-unbound-from-the-module-acpi_memhotplug.patch
acpi_memhotplugc-free-memory-device-if-acpi_memory_enable_device-failed.patch
acpi_memhotplugc-remove-memory-info-from-list-before-freeing-it.patch
acpi_memhotplugc-dont-allow-to-eject-the-memory-device-if-it-is-being-used.patch
acpi_memhotplugc-bind-the-memory-device-when-the-driver-is-being-loaded.patch
acpi_memhotplugc-auto-bind-the-memory-device-which-is-hotplugged-before-the-driver-is-loaded.patch
x86-numa-dont-check-if-node-is-numa_no_node.patch
mm-page_alloc-use-get_freepage_migratetype-instead-of-page_private.patch
mm-remain-migratetype-in-freed-page.patch
memory-hotplug-bug-fix-race-between-isolation-and-allocation.patch
memory-hotplug-fix-pages-missed-by-race-rather-than-failing.patch
mm-page_alloc-refactor-out-__alloc_contig_migrate_alloc.patch
memory-hotplug-dont-replace-lowmem-pages-with-highmem.patch
trace-events-kmem-dont-call-page_to_pfn-if-page-is-null.patch
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