Page allocator has check in __alloc_pages_slowpath() but nowdays there is earlier entry point into reclimer without such check: get_page_from_freelist() -> node_reclaim().
Signed-off-by: Konstantin Khlebnikov <[email protected]> --- mm/vmscan.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/mm/vmscan.c b/mm/vmscan.c index 62ac0c488624..52f672420f0b 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -4117,6 +4117,12 @@ int node_reclaim(struct pglist_data *pgdat, gfp_t gfp_mask, unsigned int order) { int ret; + /* + * Do not scan if allocation will never succeed. + */ + if (order >= MAX_ORDER) + return NODE_RECLAIM_NOSCAN; + /* * Node reclaim reclaims unmapped file backed pages and * slab pages if we are over the defined limits.
