From: Dave Hansen <dave.han...@linux.intel.com>
It is currently not obvious that the RECLAIM_* bits are part of the
uapi since they are defined in vmscan.c. Move them to a uapi header
to make it obvious.
This should have no functional impact.
Signed-off-by: Dave Hansen <dave.han...@linux.intel.com>
Reviewed-by: Ben Widawsky <ben.widaw...@intel.com>
Acked-by: David Rientjes <rient...@google.com>
Cc: Alex Shi <alex....@linux.alibaba.com>
Cc: Daniel Wagner <dwag...@suse.de>
Cc: "Tobin C. Harding" <to...@kernel.org>
Cc: Christoph Lameter <c...@linux.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Huang Ying <ying.hu...@intel.com>
Cc: Dan Williams <dan.j.willi...@intel.com>
Cc: Qian Cai <c...@lca.pw>
Cc: Daniel Wagner <dwag...@suse.de>
--
Note: This is not cc'd to stable. It does not fix any bugs.
---
b/include/uapi/linux/mempolicy.h | 7 +++++++
b/mm/vmscan.c | 8 --------
2 files changed, 7 insertions(+), 8 deletions(-)
diff -puN include/uapi/linux/mempolicy.h~mm-vmscan-move-RECLAIM-bits-to-uapi
include/uapi/linux/mempolicy.h
--- a/include/uapi/linux/mempolicy.h~mm-vmscan-move-RECLAIM-bits-to-uapi
2020-10-06 13:39:21.720818440 -0700
+++ b/include/uapi/linux/mempolicy.h 2020-10-06 13:39:21.726818440 -0700
@@ -62,5 +62,12 @@ enum {
#define MPOL_F_MOF (1 << 3) /* this policy wants migrate on fault */
#define MPOL_F_MORON (1 << 4) /* Migrate On protnone Reference On Node */
+/*
+ * These bit locations are exposed in the vm.zone_reclaim_mode sysctl
+ * ABI. New bits are OK, but existing bits can never change.
+ */
+#define RECLAIM_ZONE (1<<0) /* Run shrink_inactive_list on the zone */
+#define RECLAIM_WRITE (1<<1) /* Writeout pages during reclaim */
+#define RECLAIM_UNMAP (1<<2) /* Unmap pages during reclaim */
#endif /* _UAPI_LINUX_MEMPOLICY_H */
diff -puN mm/vmscan.c~mm-vmscan-move-RECLAIM-bits-to-uapi mm/vmscan.c
--- a/mm/vmscan.c~mm-vmscan-move-RECLAIM-bits-to-uapi 2020-10-06
13:39:21.722818440 -0700
+++ b/mm/vmscan.c 2020-10-06 13:39:21.727818440 -0700
@@ -4084,14 +4084,6 @@ module_init(kswapd_init)
int node_reclaim_mode __read_mostly;
/*
- * These bit locations are exposed in the vm.zone_reclaim_mode sysctl
- * ABI. New bits are OK, but existing bits can never change.
- */
-#define RECLAIM_ZONE (1<<0) /* Run shrink_inactive_list on the zone */
-#define RECLAIM_WRITE (1<<1) /* Writeout pages during reclaim */
-#define RECLAIM_UNMAP (1<<2) /* Unmap pages during reclaim */
-
-/*
* Priority for NODE_RECLAIM. This determines the fraction of pages
* of a node considered for each zone_reclaim. 4 scans 1/16th of
* a zone.
_
