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Subject[RFC 2/4] mm, compaction: add migratetype to compact_control
Date
Preparation patch. We are going to need migratetype at lower layers than
compact_zone() and compact_finished().

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
---
mm/compaction.c | 15 +++++++--------
mm/internal.h | 1 +
2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/mm/compaction.c b/mm/compaction.c
index 673a81618534..823538353b80 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1290,11 +1290,12 @@ static inline bool is_via_compact_memory(int order)
return order == -1;
}

-static enum compact_result __compact_finished(struct zone *zone, struct compact_control *cc,
- const int migratetype)
+static enum compact_result __compact_finished(struct zone *zone,
+ struct compact_control *cc)
{
unsigned int order;
unsigned long watermark;
+ const int migratetype = cc->migratetype;

if (cc->contended || fatal_signal_pending(current))
return COMPACT_CONTENDED;
@@ -1357,12 +1358,11 @@ static enum compact_result __compact_finished(struct zone *zone, struct compact_
}

static enum compact_result compact_finished(struct zone *zone,
- struct compact_control *cc,
- const int migratetype)
+ struct compact_control *cc)
{
int ret;

- ret = __compact_finished(zone, cc, migratetype);
+ ret = __compact_finished(zone, cc);
trace_mm_compaction_finished(zone, cc->order, ret);
if (ret == COMPACT_NO_SUITABLE_PAGE)
ret = COMPACT_CONTINUE;
@@ -1497,9 +1497,9 @@ static enum compact_result compact_zone(struct zone *zone, struct compact_contro
enum compact_result ret;
unsigned long start_pfn = zone->zone_start_pfn;
unsigned long end_pfn = zone_end_pfn(zone);
- const int migratetype = gfpflags_to_migratetype(cc->gfp_mask);
const bool sync = cc->mode != MIGRATE_ASYNC;

+ cc->migratetype = gfpflags_to_migratetype(cc->gfp_mask);
ret = compaction_suitable(zone, cc->order, cc->alloc_flags,
cc->classzone_idx);
/* Compaction is likely to fail */
@@ -1549,8 +1549,7 @@ static enum compact_result compact_zone(struct zone *zone, struct compact_contro

migrate_prep_local();

- while ((ret = compact_finished(zone, cc, migratetype)) ==
- COMPACT_CONTINUE) {
+ while ((ret = compact_finished(zone, cc)) == COMPACT_CONTINUE) {
int err;

switch (isolate_migratepages(zone, cc)) {
diff --git a/mm/internal.h b/mm/internal.h
index 537ac9951f5f..1fee63010dcc 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -182,6 +182,7 @@ struct compact_control {
bool direct_compaction; /* False from kcompactd or /proc/... */
bool whole_zone; /* Whole zone should/has been scanned */
int order; /* order a direct compactor needs */
+ int migratetype; /* migratetype of direct compactor */
const gfp_t gfp_mask; /* gfp mask of a direct compactor */
const unsigned int alloc_flags; /* alloc flags of a direct compactor */
const int classzone_idx; /* zone index of a direct compactor */
--
2.10.0
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