On 25.08.2016 00:22, Michal Hocko wrote:
On Wed 24-08-16 11:13:31, Ralf-Peter Rohbeck wrote:
On 19.08.2016 01:26, Michal Hocko wrote:
[...]
diff --git a/mm/compaction.c b/mm/compaction.c
index ae4f40afcca1..3e35fce2cace 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1644,8 +1644,8 @@ static enum compact_result compact_zone_order(struct zone *zone, int order,
.alloc_flags = alloc_flags,
.classzone_idx = classzone_idx,
.direct_compaction = true,
- .whole_zone = (prio == COMPACT_PRIO_SYNC_FULL),
- .ignore_skip_hint = (prio == COMPACT_PRIO_SYNC_FULL)
+ .whole_zone = (prio == MIN_COMPACT_PRIORITY),
+ .ignore_skip_hint = (prio == MIN_COMPACT_PRIORITY)
};
INIT_LIST_HEAD(&cc.freepages);
INIT_LIST_HEAD(&cc.migratepages);
@@ -1691,7 +1691,7 @@ enum compact_result try_to_compact_pages(gfp_t gfp_mask, unsigned int order,
ac->nodemask) {
enum compact_result status;
- if (prio > COMPACT_PRIO_SYNC_FULL
+ if (prio > MIN_COMPACT_PRIORITY
&& compaction_deferred(zone, order)) {
rc = max_t(enum compact_result, COMPACT_DEFERRED, rc);
continue;
--
2.9.2
This change was in linux-next-20160823 so I ran it unmodified.
I did get an OOM, see attached.
This patch shouldn't make any difference to the previous patch you were
testing. Anyway I do not have the above linux-next tag so I cannot check
what exactly was there. The current code in linux-next contains
https://urldefense.proofpoint.com/v2/url?u=http-3A__lkml.kernel.org_r_20160823074339.GB23577-40dhcp22.suse.cz&d=DQIBAg&c=8S5idjlO_n28Ko3lg6lskTMwneSC-WqZ5EBTEEvDlkg&r=yGQdEpZknbtYvR0TyhkCGu-ifLklIvXIf740poRFltQ&m=CNEWNMAovbVAu8gw1UooufVBqAK0HbH5FJskyAmkR1g&s=S-eqTOP5U79awF_vqBSGNfNrvOe5l60XzVoVa6DuWx4&e= so a
different approach. Once that patch hits the Linus tree we will try to
resurrect the compaction improvements series in linux-next and continue
with the testing.
Sorry, the tag was next-20160823; I called the branch linux-next-20160823.
Ralf-Peter
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