From patchwork Fri Aug 27 00:52:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "kangning18z@ict.ac.cn" X-Patchwork-Id: 12460917 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EFD54C4320E for ; Fri, 27 Aug 2021 00:52:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CDB0560E76 for ; Fri, 27 Aug 2021 00:52:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243823AbhH0Axk (ORCPT ); Thu, 26 Aug 2021 20:53:40 -0400 Received: from smtp21.cstnet.cn ([159.226.251.21]:57626 "EHLO cstnet.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S243811AbhH0Axk (ORCPT ); Thu, 26 Aug 2021 20:53:40 -0400 Received: from localhost.localdomain (unknown [202.189.3.195]) by APP-01 (Coremail) with SMTP id qwCowAAnUtBPNyhh70WtAA--.33361S2; Fri, 27 Aug 2021 08:52:32 +0800 (CST) From: kangning To: haakon.bugge@oracle.com Cc: linux-rdma@vger.kernel.org, kangning Subject: [PATCH v3] Fix one error in mthca_alloc Date: Fri, 27 Aug 2021 08:52:28 +0800 Message-Id: <20210827005228.15671-1-kangning18z@ict.ac.cn> X-Mailer: git-send-email 2.17.1 X-CM-TRANSID: qwCowAAnUtBPNyhh70WtAA--.33361S2 X-Coremail-Antispam: 1UD129KBjvdXoWrtr1rtryDuw4rCFW8AryftFb_yoWfAwb_C3 W8tFn7ZrW5CF1Iyr1SqF17Za40vr1rKw4xuwnIqry3XFWqgF48Jw1vqrWrua1xAFy5CF43 t34UtF4IkrsxKjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbIkYjsxI4VW3JwAYFVCjjxCrM7AC8VAFwI0_Jr0_Gr1l1xkIjI8I 6I8E6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AEw4v_Jr0_Jr4l8cAvFVAK0II2c7xJM2 8CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWUCVW8JwA2z4x0Y4vE2Ix0 cI8IcVCY1x0267AKxVW8JVWxJwA2z4x0Y4vEx4A2jsIE14v26r4j6F4UM28EF7xvwVC2z2 80aVCY1x0267AKxVW8JVW8Jr1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IE w4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jrv_JF1lYx0Ex4A2jsIE14v26r4j6F4UMc vjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v 4I1lc2xSY4AK64IkMxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I 0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWU XVWUAwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcV CY1x0267AKxVWUJVW8JwCI42IY6xAIw20EY4v20xvaj40_WFyUJVCq3wCI42IY6I8E87Iv 67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r1j6r4UYxBIdaVFxhVjvjDU0xZFpf 9x0zEHUDJUUUUU= X-Originating-IP: [202.189.3.195] X-CM-SenderInfo: pndqw0plqjimn26lu3wodfhubq/1tbiCQcGCl02ad-GYAABs4 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org drivers/infiniband/hw/mthca/mthca_allocator.c: alloc->last left unchanged in mthca_alloc, which has impact on performance of function find_next_zero_bit in mthca_alloc. Signed-off-by: kangning --- I squashed two commits into one in this version. drivers/infiniband/hw/mthca/mthca_allocator.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/infiniband/hw/mthca/mthca_allocator.c b/drivers/infiniband/hw/mthca/mthca_allocator.c index aef1d274a14e..1141695093e7 100644 --- a/drivers/infiniband/hw/mthca/mthca_allocator.c +++ b/drivers/infiniband/hw/mthca/mthca_allocator.c @@ -51,6 +51,9 @@ u32 mthca_alloc(struct mthca_alloc *alloc) } if (obj < alloc->max) { + alloc->last = obj + 1; + if (alloc->last == alloc->max) + alloc->last = 0; set_bit(obj, alloc->table); obj |= alloc->top; } else