path: root/include/trace/events/kmem.h
diff options
authorMel Gorman <mgorman@techsingularity.net>2017-11-15 17:37:59 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-15 18:21:06 -0800
commit2d4894b5d2ae0fe1725ea7abd57b33bfbbe45492 (patch)
treeab55401d2d6181491fa9e767561275c2992680e6 /include/trace/events/kmem.h
parentc6f92f9fbe7dbcc8903a67229aa88b4077ae4422 (diff)
mm: remove cold parameter from free_hot_cold_page*
Most callers users of free_hot_cold_page claim the pages being released are cache hot. The exception is the page reclaim paths where it is likely that enough pages will be freed in the near future that the per-cpu lists are going to be recycled and the cache hotness information is lost. As no one really cares about the hotness of pages being released to the allocator, just ditch the parameter. The APIs are renamed to indicate that it's no longer about hot/cold pages. It should also be less confusing as there are subtle differences between them. __free_pages drops a reference and frees a page when the refcount reaches zero. free_hot_cold_page handled pages whose refcount was already zero which is non-obvious from the name. free_unref_page should be more obvious. No performance impact is expected as the overhead is marginal. The parameter is removed simply because it is a bit stupid to have a useless parameter copied everywhere. [mgorman@techsingularity.net: add pages to head, not tail] Link: http://lkml.kernel.org/r/20171019154321.qtpzaeftoyyw4iey@techsingularity.net Link: http://lkml.kernel.org/r/20171018075952.10627-8-mgorman@techsingularity.net Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Andi Kleen <ak@linux.intel.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Jan Kara <jack@suse.cz> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/trace/events/kmem.h')
1 files changed, 4 insertions, 7 deletions
diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h
index 285feeadac39..eb57e3037deb 100644
--- a/include/trace/events/kmem.h
+++ b/include/trace/events/kmem.h
@@ -172,24 +172,21 @@ TRACE_EVENT(mm_page_free,
- TP_PROTO(struct page *page, int cold),
+ TP_PROTO(struct page *page),
- TP_ARGS(page, cold),
+ TP_ARGS(page),
__field( unsigned long, pfn )
- __field( int, cold )
__entry->pfn = page_to_pfn(page);
- __entry->cold = cold;
- TP_printk("page=%p pfn=%lu order=0 cold=%d",
+ TP_printk("page=%p pfn=%lu order=0",
- __entry->pfn,
- __entry->cold)
+ __entry->pfn)