[RFC][PATCH 02/13] mm/vmscan: move RECLAIM* bits to uapi header
From: Dave Hansen <dave.hansen@linux.intel.com>
Date: 2021-01-26 10:26:10
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From: Dave Hansen <dave.hansen@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.hansen@linux.intel.com> Reviewed-by: Ben Widawsky <redacted> Acked-by: David Rientjes <rientjes@google.com> Acked-by: Christoph Lameter <redacted> Cc: Alex Shi <redacted> Cc: Daniel Wagner <redacted> Cc: "Tobin C. Harding" <tobin@kernel.org> Cc: Christoph Lameter <redacted> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Huang Ying <redacted> Cc: Dan Williams <redacted> Cc: Qian Cai <redacted> Cc: Daniel Wagner <redacted> Cc: osalvador <osalvador@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 2021-01-25 16:23:07.197866715 -0800
+++ b/include/uapi/linux/mempolicy.h 2021-01-25 16:23:07.203866715 -0800@@ -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 2021-01-25 16:23:07.199866715 -0800
+++ b/mm/vmscan.c 2021-01-25 16:23:07.204866715 -0800@@ -4087,14 +4087,6 @@ 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.
_