This flag is used to indicate to the callees that this allocation is a
kernel allocation in process context, and should be accounted to
current's memcg. It takes numerical place of the of the recently removed
__GFP_NO_KSWAPD.
[ v4: make flag unconditional, also declare it in trace code ]
Signed-off-by: Glauber Costa <glom...@parallels.com>
Acked-by: Johannes Weiner <han...@cmpxchg.org>
Acked-by: Rik van Riel <r...@redhat.com>
Acked-by: Mel Gorman <m...@csn.ul.ie>
Acked-by: Kamezawa Hiroyuki <kamezawa.hir...@jp.fujitsu.com>
CC: Christoph Lameter <c...@linux.com>
CC: Pekka Enberg <penb...@cs.helsinki.fi>
CC: Michal Hocko <mho...@suse.cz>
CC: Suleiman Souhlal <sulei...@google.com>
CC: Tejun Heo <t...@kernel.org>
---
include/linux/gfp.h | 3 ++-
include/trace/events/gfpflags.h | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 02c1c97..9289d46 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -31,6 +31,7 @@ struct vm_area_struct;
#define ___GFP_THISNODE 0x40000u
#define ___GFP_RECLAIMABLE 0x80000u
#define ___GFP_NOTRACK 0x200000u
+#define ___GFP_KMEMCG 0x400000u
#define ___GFP_OTHER_NODE 0x800000u
#define ___GFP_WRITE 0x1000000u
@@ -87,7 +88,7 @@ struct vm_area_struct;
#define __GFP_OTHER_NODE ((__force gfp_t)___GFP_OTHER_NODE) /* On behalf of
other node */
#define __GFP_WRITE ((__force gfp_t)___GFP_WRITE) /* Allocator intends to
dirty page */
-
+#define __GFP_KMEMCG ((__force gfp_t)___GFP_KMEMCG) /* Allocation comes from
a memcg-accounted resource */
/*
* This may seem redundant, but it's a way of annotating false positives vs.
* allocations that simply cannot be supported (e.g. page tables).
diff --git a/include/trace/events/gfpflags.h b/include/trace/events/gfpflags.h
index 9391706..730df12 100644
--- a/include/trace/events/gfpflags.h
+++ b/include/trace/events/gfpflags.h
@@ -36,6 +36,7 @@
{(unsigned long)__GFP_RECLAIMABLE, "GFP_RECLAIMABLE"}, \
{(unsigned long)__GFP_MOVABLE, "GFP_MOVABLE"}, \
{(unsigned long)__GFP_NOTRACK, "GFP_NOTRACK"}, \
+ {(unsigned long)__GFP_KMEMCG, "GFP_KMEMCG"}, \
{(unsigned long)__GFP_OTHER_NODE, "GFP_OTHER_NODE"} \
) : "GFP_NOWAIT"
--
1.7.11.7
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