On 2024/10/9 11:55, Kai Shen wrote:
This patch adds missing percpu_ref_exit when releasing percpu refs. When releasing percpu refs, percpu_ref_exit should be called. Otherwise, memory leak happens. Signed-off-by: Kai Shen <KaiShen@xxxxxxxxxxxxxxxxx> --- net/smc/smc_wr.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/net/smc/smc_wr.c b/net/smc/smc_wr.c index 0021065a600a..994c0cd4fddb 100644 --- a/net/smc/smc_wr.c +++ b/net/smc/smc_wr.c @@ -648,8 +648,10 @@ void smc_wr_free_link(struct smc_link *lnk) smc_wr_tx_wait_no_pending_sends(lnk); percpu_ref_kill(&lnk->wr_reg_refs); wait_for_completion(&lnk->reg_ref_comp); + percpu_ref_exit(&lnk->wr_reg_refs); percpu_ref_kill(&lnk->wr_tx_refs); wait_for_completion(&lnk->tx_ref_comp); + percpu_ref_exit(&lnk->wr_tx_refs);if (lnk->wr_rx_dma_addr) {ib_dma_unmap_single(ibdev, lnk->wr_rx_dma_addr, @@ -912,11 +914,13 @@ int smc_wr_create_link(struct smc_link *lnk) init_waitqueue_head(&lnk->wr_reg_wait); rc = percpu_ref_init(&lnk->wr_reg_refs, smcr_wr_reg_refs_free, 0, GFP_KERNEL); if (rc) - goto dma_unmap; + goto cancel_ref; init_completion(&lnk->reg_ref_comp); init_waitqueue_head(&lnk->wr_rx_empty_wait); return rc;+cancel_ref:+ percpu_ref_exit(&lnk->wr_tx_refs); dma_unmap: if (lnk->wr_rx_v2_dma_addr) { ib_dma_unmap_single(ibdev, lnk->wr_rx_v2_dma_addr,
Hi, Kai.
I think this is a fix to 79a22238b4f2 ("net/smc: Use percpu ref for wr tx reference").
So send it to net please and add a fix tag. Thanks!
