From mboxrd@z Thu Jan 1 00:00:00 1970 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 A3D0BC433FE for ; Tue, 31 May 2022 18:21:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347004AbiEaSVl (ORCPT ); Tue, 31 May 2022 14:21:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52882 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346916AbiEaSVi (ORCPT ); Tue, 31 May 2022 14:21:38 -0400 Received: from mail.cybernetics.com (mail.cybernetics.com [173.71.130.66]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9D4059CC9C for ; Tue, 31 May 2022 11:21:37 -0700 (PDT) X-ASG-Debug-ID: 1654021295-1cf43917f334b0b0001-xx1T2L Received: from cybernetics.com ([10.10.4.126]) by mail.cybernetics.com with ESMTP id QlerWlG95wKKsGNK; Tue, 31 May 2022 14:21:35 -0400 (EDT) X-Barracuda-Envelope-From: tonyb@cybernetics.com X-ASG-Whitelist: Client DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=cybernetics.com; s=mail; bh=oESBKLtZD0XfE8ixha9kfGkjSenTdPQVKS9D5YrpgSM=; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:References:Cc:To:From: Content-Language:Subject:MIME-Version:Date:Message-ID; b=E06FpEHrfSATsbsioMp8 Ae89/HwwmRl53JAltDNa/4r2t995qyZVnUrG5PTWufTxHMM9HZasP0FlsIdfwNZD3wSKdGWvfSF4w 0Sx3tUnjdQ1AdRBSGzvjqUkh0hQq84PRsu5g+uKPf3Cw9WgT6Itnr8UU18IZBHv8nQ52Q5CCMM= Received: from [10.157.2.224] (HELO [192.168.200.1]) by cybernetics.com (CommuniGate Pro SMTP 7.1.1) with ESMTPS id 11829227; Tue, 31 May 2022 14:21:35 -0400 Message-ID: <35eeaddc-b27c-aee7-8c0f-96afcb2858d5@cybernetics.com> Date: Tue, 31 May 2022 14:21:35 -0400 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: [PATCH 07/10] dmapool: speedup DMAPOOL_DEBUG with init_on_alloc Content-Language: en-US X-ASG-Orig-Subj: [PATCH 07/10] dmapool: speedup DMAPOOL_DEBUG with init_on_alloc From: Tony Battersby To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: iommu@lists.linux-foundation.org, kernel-team@fb.com, Matthew Wilcox , Keith Busch , Andy Shevchenko , Robin Murphy , Tony Lindgren References: <9b08ab7c-b80b-527d-9adf-7716b0868fbc@cybernetics.com> In-Reply-To: <9b08ab7c-b80b-527d-9adf-7716b0868fbc@cybernetics.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: UNKNOWN[10.10.4.126] X-Barracuda-Start-Time: 1654021295 X-Barracuda-URL: https://10.10.4.122:443/cgi-mod/mark.cgi X-Barracuda-BRTS-Status: 1 X-Virus-Scanned: by bsmtpd at cybernetics.com X-Barracuda-Scan-Msg-Size: 688 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Avoid double-memset of the same allocated memory in dma_pool_alloc() when both DMAPOOL_DEBUG is enabled and init_on_alloc=1. Signed-off-by: Tony Battersby --- mm/dmapool.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/dmapool.c b/mm/dmapool.c index 49019ef6dd83..8749a9d7927e 100644 --- a/mm/dmapool.c +++ b/mm/dmapool.c @@ -365,7 +365,7 @@ void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, break; } } - if (!(mem_flags & __GFP_ZERO)) + if (!want_init_on_alloc(mem_flags)) memset(retval, POOL_POISON_ALLOCATED, pool->size); #endif spin_unlock_irqrestore(&pool->lock, flags); -- 2.25.1