From patchwork Sun Apr 17 02:43:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhu Yanjun X-Patchwork-Id: 12815790 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AFDA4C433F5 for ; Sat, 16 Apr 2022 10:17:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230162AbiDPKTc (ORCPT ); Sat, 16 Apr 2022 06:19:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50744 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230216AbiDPKTb (ORCPT ); Sat, 16 Apr 2022 06:19:31 -0400 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B9B9C3FBC6 for ; Sat, 16 Apr 2022 03:16:59 -0700 (PDT) X-IronPort-AV: E=McAfee;i="6400,9594,10318"; a="243214267" X-IronPort-AV: E=Sophos;i="5.90,264,1643702400"; d="scan'208";a="243214267" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Apr 2022 03:16:59 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,264,1643702400"; d="scan'208";a="509216069" Received: from unknown (HELO intel-71.bj.intel.com) ([10.238.154.71]) by orsmga003.jf.intel.com with ESMTP; 16 Apr 2022 03:16:57 -0700 From: yanjun.zhu@linux.dev To: jgg@ziepe.ca, leon@kernel.org, linux-rdma@vger.kernel.org, yanjun.zhu@linux.dev Subject: [PATCHv2 2/2] RDMA/rxe: Use different xa locks on different path Date: Sat, 16 Apr 2022 22:43:43 -0400 Message-Id: <20220417024343.568777-2-yanjun.zhu@linux.dev> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220417024343.568777-1-yanjun.zhu@linux.dev> References: <20220417024343.568777-1-yanjun.zhu@linux.dev> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: Zhu Yanjun The function __rxe_add_to_pool is called on different path, and the requirement of the locks is different. The function rxe_create_ah requires xa_lock_irqsave/irqrestore while others only require xa_lock_irq. Signed-off-by: Zhu Yanjun --- V1->V2: Use pool type instead of gfp_t; --- drivers/infiniband/sw/rxe/rxe_pool.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/infiniband/sw/rxe/rxe_pool.c b/drivers/infiniband/sw/rxe/rxe_pool.c index f1f06dc7e64f..5b097d6666eb 100644 --- a/drivers/infiniband/sw/rxe/rxe_pool.c +++ b/drivers/infiniband/sw/rxe/rxe_pool.c @@ -157,7 +157,6 @@ void *rxe_alloc(struct rxe_pool *pool) int __rxe_add_to_pool(struct rxe_pool *pool, struct rxe_pool_elem *elem) { int err; - unsigned long flags; if (WARN_ON(pool->flags & RXE_POOL_ALLOC)) return -EINVAL; @@ -169,10 +168,19 @@ int __rxe_add_to_pool(struct rxe_pool *pool, struct rxe_pool_elem *elem) elem->obj = (u8 *)elem - pool->elem_offset; kref_init(&elem->ref_cnt); - xa_lock_irqsave(&pool->xa, flags); - err = __xa_alloc_cyclic(&pool->xa, &elem->index, elem, pool->limit, - &pool->next, GFP_ATOMIC); - xa_unlock_irqrestore(&pool->xa, flags); + if (pool->type == RXE_TYPE_AH) { + unsigned long flags; + + xa_lock_irqsave(&pool->xa, flags); + err = __xa_alloc_cyclic(&pool->xa, &elem->index, elem, pool->limit, + &pool->next, GFP_ATOMIC); + xa_unlock_irqrestore(&pool->xa, flags); + } else { + xa_lock_irq(&pool->xa); + err = __xa_alloc_cyclic(&pool->xa, &elem->index, elem, pool->limit, + &pool->next, GFP_KERNEL); + xa_unlock_irq(&pool->xa); + } if (err) goto err_cnt;