From 0d9ed0f09b92f730ae3a755415c4e68e62c4cf99 Mon Sep 17 00:00:00 2001 From: Yishai Hadas Date: Wed, 9 Dec 2020 09:15:39 +0200 Subject: [PATCH] mlx5: Consider single threaded mode for shared UAR [ Upstream commit 9d6cbd2858d237d1d56bada430eca032074204c8 ] In case application uses a single threaded mode even a UAR that is shared between QPs doesn't need to take a lock. Fixes: 7fdcd258bc5f ("mlx5: Move to fully dynamic UAR mode including QPs") Signed-off-by: Yishai Hadas Signed-off-by: Nicolas Morey-Chaisemartin --- providers/mlx5/verbs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/providers/mlx5/verbs.c b/providers/mlx5/verbs.c index 7907218295f6..cc93dc4c366e 100644 --- a/providers/mlx5/verbs.c +++ b/providers/mlx5/verbs.c @@ -326,7 +326,7 @@ static void mlx5_insert_dyn_uuars(struct mlx5_context *ctx, if (!bf_uar->dyn_alloc_uar) bf->bfreg_dyn_index = (ctx->curr_legacy_dyn_sys_uar_page - 1) * num_bfregs_per_page + j; bf->dyn_alloc_uar = bf_uar->dyn_alloc_uar; - bf->need_lock = bf_uar->qp_shared; + bf->need_lock = bf_uar->qp_shared && !mlx5_single_threaded; mlx5_spinlock_init(&bf->lock, bf->need_lock); if (j != 0) { bf->uar = bf_uar->uar; -- 2.25.4