the name SWAP implies that we are dealing with anonymous pages only.
In fact, the original patch that introduced the min_unmapped_ratio
logic was to fix an issue related to file pages. Rename it to
RECLAIM_UNMAP to match what does.
Historically, commit <a6dc60f8975a> renamed .may_swap to .may_unmap,
leaving RECLAIM_SWAP behind. commit <2e2e42598908> reintroduced .may_swap
for memory controller.
Signed-off-by: Zhihui Zhang <zzhs...@gmail.com>
---
mm/vmscan.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 5e8eadd..15328de 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3596,7 +3596,7 @@ int zone_reclaim_mode __read_mostly;
#define RECLAIM_OFF 0
#define RECLAIM_ZONE (1<<0) /* Run shrink_inactive_list on the zone */
#define RECLAIM_WRITE (1<<1) /* Writeout pages during reclaim */
-#define RECLAIM_SWAP (1<<2) /* Swap pages out during reclaim */
+#define RECLAIM_UNMAP (1<<2) /* Unmap pages during reclaim */
/*
* Priority for ZONE_RECLAIM. This determines the fraction of pages
@@ -3638,12 +3638,12 @@ static long zone_pagecache_reclaimable(struct zone
*zone)
long delta = 0;
/*
- * If RECLAIM_SWAP is set, then all file pages are considered
+ * If RECLAIM_UNMAP is set, then all file pages are considered
* potentially reclaimable. Otherwise, we have to worry about
* pages like swapcache and zone_unmapped_file_pages() provides
* a better estimate
*/
- if (zone_reclaim_mode & RECLAIM_SWAP)
+ if (zone_reclaim_mode & RECLAIM_UNMAP)
nr_pagecache_reclaimable = zone_page_state(zone, NR_FILE_PAGES);
else
nr_pagecache_reclaimable = zone_unmapped_file_pages(zone);
@@ -3674,15 +3674,15 @@ static int __zone_reclaim(struct zone *zone, gfp_t
gfp_mask, unsigned int order)
.order = order,
.priority = ZONE_RECLAIM_PRIORITY,
.may_writepage = !!(zone_reclaim_mode & RECLAIM_WRITE),
- .may_unmap = !!(zone_reclaim_mode & RECLAIM_SWAP),
+ .may_unmap = !!(zone_reclaim_mode & RECLAIM_UNMAP),
.may_swap = 1,
};
cond_resched();
/*
- * We need to be able to allocate from the reserves for RECLAIM_SWAP
+ * We need to be able to allocate from the reserves for RECLAIM_UNMAP
* and we also need to be able to write out pages for RECLAIM_WRITE
- * and RECLAIM_SWAP.
+ * and RECLAIM_UNMAP.
*/
p->flags |= PF_MEMALLOC | PF_SWAPWRITE;
lockdep_set_current_reclaim_state(gfp_mask);
--
2.1.4
--
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