mm, page_alloc: remove field from alloc_context
The classzone_idx can be inferred from preferred_zoneref so remove the
unnecessary field and save stack space.
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/compaction.c b/mm/compaction.c
index 8f339ca..eda3c22 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1602,7 +1602,7 @@
status = compact_zone_order(zone, order, gfp_mask, mode,
&zone_contended, alloc_flags,
- ac->classzone_idx);
+ ac_classzone_idx(ac));
rc = max(status, rc);
/*
* It takes at least one zone that wasn't lock contended
@@ -1612,7 +1612,7 @@
/* If a normal allocation would succeed, stop compacting */
if (zone_watermark_ok(zone, order, low_wmark_pages(zone),
- ac->classzone_idx, alloc_flags)) {
+ ac_classzone_idx(ac), alloc_flags)) {
/*
* We think the allocation will succeed in this zone,
* but it is not certain, hence the false. The caller
diff --git a/mm/internal.h b/mm/internal.h
index d1ddd71..3ac544f 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -103,12 +103,13 @@
struct zonelist *zonelist;
nodemask_t *nodemask;
struct zoneref *preferred_zoneref;
- int classzone_idx;
int migratetype;
enum zone_type high_zoneidx;
bool spread_dirty_pages;
};
+#define ac_classzone_idx(ac) zonelist_zone_idx(ac->preferred_zoneref)
+
/*
* Locate the struct page for both the matching buddy in our
* pair (buddy1) and the combined O(n+1) page they form (page).
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index dba8cfd..9da66e7 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2771,7 +2771,7 @@
mark = zone->watermark[alloc_flags & ALLOC_WMARK_MASK];
if (!zone_watermark_fast(zone, order, mark,
- ac->classzone_idx, alloc_flags)) {
+ ac_classzone_idx(ac), alloc_flags)) {
int ret;
/* Checked here to keep the fast path fast */
@@ -2794,7 +2794,7 @@
default:
/* did we reclaim enough */
if (zone_watermark_ok(zone, order, mark,
- ac->classzone_idx, alloc_flags))
+ ac_classzone_idx(ac), alloc_flags))
goto try_this_zone;
continue;
@@ -3114,7 +3114,7 @@
for_each_zone_zonelist_nodemask(zone, z, ac->zonelist,
ac->high_zoneidx, ac->nodemask)
- wakeup_kswapd(zone, order, zonelist_zone_idx(ac->preferred_zoneref));
+ wakeup_kswapd(zone, order, ac_classzone_idx(ac));
}
static inline unsigned int
@@ -3422,8 +3422,6 @@
goto no_zone;
}
- ac.classzone_idx = zonelist_zone_idx(ac.preferred_zoneref);
-
/* First allocation attempt */
page = get_page_from_freelist(alloc_mask, order, alloc_flags, &ac);
if (likely(page))