From: Chen Ridong The upcoming patch will integrate shrink_many and shrink_node_memcgs. Currently, lru_gen_shrink_lruvec only supports non-root reclaim invoked from shrink_node_memcgs. This patch extends it to also handle root reclaim. Since the initial setup for root reclaim is already completed in lru_gen_shrink_node, we can simply call try_to_shrink_lruvec within lru_gen_shrink_lruvec for root reclaim. Signed-off-by: Chen Ridong --- mm/vmscan.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index e55c7835cab5..3a266f6456af 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -4820,7 +4820,15 @@ static void lru_gen_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc { struct blk_plug plug; - VM_WARN_ON_ONCE(root_reclaim(sc)); + /* + * For root reclaim, the initial setup has already been completed externally; + * proceed directly with the shrinking operation. + */ + if (root_reclaim(sc)) { + try_to_shrink_lruvec(lruvec, sc); + return; + } + VM_WARN_ON_ONCE(!sc->may_writepage || !sc->may_unmap); lru_add_drain(); -- 2.34.1