From: Dave Hansen <[email protected]>
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 <[email protected]>
Reviewed-by: Ben Widawsky <[email protected]>
Acked-by: David Rientjes <[email protected]>
Cc: Alex Shi <[email protected]>
Cc: Daniel Wagner <[email protected]>
Cc: "Tobin C. Harding" <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Huang Ying <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Qian Cai <[email protected]>
Cc: Daniel Wagner <[email protected]>
--
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.
_
On Tue, 6 Oct 2020, Dave Hansen wrote:
> 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.
Acked-by: Christoph Lameter <[email protected]>