Just an idea, try reproducing with kernel patch `le9g.patch`:
```
diff --git a/mm/vmscan.c b/mm/vmscan.c
index dbdc46a84f63..7a0b7e32ff45 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2445,6 +2445,13 @@ static void get_scan_count(struct lruvec *lruvec, struct
mem_cgroup *memcg,
BUG();
}
+ if (NR_ACTIVE_FILE == lru) {
+ long long kib_active_file_now=global_node_page_state(NR_ACTIVE_FILE) *
MAX_NR_ZONES;
+ if (kib_active_file_now <= 256*1024) {
+ nr[lru] = 0; //don't reclaim any Active(file) (see /proc/meminfo) if
they are under 256MiB
+ continue;
+ }
+ }
*lru_pages += size;
nr[lru] = scan;
}
```
see:
https://gist.github.com/constantoverride/84eba764f487049ed642eb2111a20830#gistcomment-2997481
(^ scroll a bit up for some details of what the patch does)
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https://bugs.launchpad.net/bugs/1833281
Title:
System freeze when memory is put on SWAP in Linux >4.10.x
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