Thanks to Johanns and Daisuke for suggestion.
=
Hugepage allocation shouldn't trigger oom.
Allocation failure is not fatal.
Orignal-patch-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
---
mm/memcontrol.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
Index: mmotm-0125/mm/memcontrol.c
===================================================================
--- mmotm-0125.orig/mm/memcontrol.c
+++ mmotm-0125/mm/memcontrol.c
@@ -2369,11 +2369,14 @@ static int mem_cgroup_charge_common(stru
struct page_cgroup *pc;
int ret;
int page_size = PAGE_SIZE;
+ bool oom;
if (PageTransHuge(page)) {
page_size <<= compound_order(page);
VM_BUG_ON(!PageTransHuge(page));
- }
+ oom = false;
+ } else
+ oom = true;
pc = lookup_page_cgroup(page);
/* can happen at boot */
@@ -2381,7 +2384,7 @@ static int mem_cgroup_charge_common(stru
return 0;
prefetchw(pc);
- ret = __mem_cgroup_try_charge(mm, gfp_mask, &mem, true, page_size);
+ ret = __mem_cgroup_try_charge(mm, gfp_mask, &mem, oom, page_size);
if (ret || !mem)
return ret;
--
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