The patch titled
Subject: mm/compaction.c: fix zoneindex in kcompactd()
has been removed from the -mm tree. Its filename was
mm-compact-fix-zoneindex-in-compact.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Chen Feng <puck.chen@xxxxxxxxxxxxx>
Subject: mm/compaction.c: fix zoneindex in kcompactd()
While testing the kcompactd in my platform 3G MEM only DMA ZONE. I found
the kcompactd never wakeup. It seems the zoneindex has already minus 1
before. So the traverse here should be <=.
It fixes a regression where kswapd could previously compact, but
kcompactd not. Not a crash fix though.
[akpm@xxxxxxxxxxxxxxxxxxxx: fix kcompactd_do_work() as well, per Hugh]
Link: http://lkml.kernel.org/r/1463659121-84124-1-git-send-email-puck.chen@xxxxxxxxxxxxx
Fixes: accf62422b3a ("mm, kswapd: replace kswapd compaction with waking up kcompactd")
Signed-off-by: Chen Feng <puck.chen@xxxxxxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Zhuangluan Su <suzhuangluan@xxxxxxxxxxxxx>
Cc: Yiping Xu <xuyiping@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/compaction.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN mm/compaction.c~mm-compact-fix-zoneindex-in-compact mm/compaction.c
--- a/mm/compaction.c~mm-compact-fix-zoneindex-in-compact
+++ a/mm/compaction.c
@@ -1862,7 +1862,7 @@ static bool kcompactd_node_suitable(pg_d
struct zone *zone;
enum zone_type classzone_idx = pgdat->kcompactd_classzone_idx;
- for (zoneid = 0; zoneid < classzone_idx; zoneid++) {
+ for (zoneid = 0; zoneid <= classzone_idx; zoneid++) {
zone = &pgdat->node_zones[zoneid];
if (!populated_zone(zone))
@@ -1897,7 +1897,7 @@ static void kcompactd_do_work(pg_data_t
cc.classzone_idx);
count_vm_event(KCOMPACTD_WAKE);
- for (zoneid = 0; zoneid < cc.classzone_idx; zoneid++) {
+ for (zoneid = 0; zoneid <= cc.classzone_idx; zoneid++) {
int status;
zone = &pgdat->node_zones[zoneid];
_
Patches currently in -mm which might be from puck.chen@xxxxxxxxxxxxx are
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