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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,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 CB2A3C4360C for ; Sun, 13 Oct 2019 16:58:41 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9A14B20679 for ; Sun, 13 Oct 2019 16:58:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="s/9Og2k2" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9A14B20679 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mellanox.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=kI6jJWbwxjLnye9LfVSgymAmDAswWN4ObBaLrcxuVM8=; b=s/9Og2k2M4YvUEAohm6AzXgsVL jCDg5nezG6prGyaUmSvt7XieQsAw0S3vDEXxEVJLs1xHh6Iyzf5+wK/qFaC9UtR7n2Q07hDA+w5+N S8MHLEwAJXpAO8ge6/ZIe9vh7qoBS8YQxRzb0kPaJHrguGNXalGcjpGpgRl8rttpRfdLCj4ioO5JQ 3jAOjgv5GAyrxD29kxbBWGqpbZcCQT1/9W8O8ODmFMCWv4uuYsUn1hh3lgCaFskuQAfStarc6Mxc0 GkvfB6HkZLl5YUNjBld3/8HfSvPF5/Vf9gB5rYsZzskVrf+RDVDGu0UjKaIppfSnRqpOL32+EpYqS y0WaN6tA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iJhCW-0005Yt-Uh; Sun, 13 Oct 2019 16:58:37 +0000 Received: from mail-il-dmz.mellanox.com ([193.47.165.129] helo=mellanox.co.il) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iJhBq-0004u3-6d for linux-nvme@lists.infradead.org; Sun, 13 Oct 2019 16:57:56 +0000 Received: from Internal Mail-Server by MTLPINE1 (envelope-from maxg@mellanox.com) with ESMTPS (AES256-SHA encrypted); 13 Oct 2019 18:57:40 +0200 Received: from r-vnc12.mtr.labs.mlnx (r-vnc12.mtr.labs.mlnx [10.208.0.12]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id x9DGvdoO005965; Sun, 13 Oct 2019 19:57:39 +0300 From: Max Gurtovoy To: linux-nvme@lists.infradead.org, hch@lst.de, kbusch@kernel.org, sagi@grimberg.me Subject: [PATCH 3/8] nvmet: add unlikely check at nvmet_req_alloc_sgl Date: Sun, 13 Oct 2019 19:57:33 +0300 Message-Id: <1570985858-26805-4-git-send-email-maxg@mellanox.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1570985858-26805-1-git-send-email-maxg@mellanox.com> References: <1570985858-26805-1-git-send-email-maxg@mellanox.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191013_095754_634466_F78875CD X-CRM114-Status: UNSURE ( 8.46 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: israelr@mellanox.com, james.smart@broadcom.com, shlomin@mellanox.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org From: Israel Rukshin The call to sgl_alloc shouldn't fail so add this simple optimization to the fast path. Signed-off-by: Israel Rukshin Reviewed-by: Max Gurtovoy --- drivers/nvme/target/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index 3a67e24..6b39cfc 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -966,7 +966,7 @@ int nvmet_req_alloc_sgl(struct nvmet_req *req) } req->sg = sgl_alloc(req->transfer_len, GFP_KERNEL, &req->sg_cnt); - if (!req->sg) + if (unlikely(!req->sg)) return -ENOMEM; return 0; -- 1.8.3.1 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme