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=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 1FE19C433E1 for ; Sat, 8 Aug 2020 23:52:28 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 CA99D206B5 for ; Sat, 8 Aug 2020 23:52:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="ZbmkKA3o"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="HqvPqYUU" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CA99D206B5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version: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=FrPXhdMb4E+biXTpE0YqVcfK7SzTf2bTOyuFYpV7DoU=; b=ZbmkKA3ovJ1OOeNN/kBmbfsKM edSufIzbQNABOFCG5Z/7pkiWr6bEnYRralRza1Nh6Mnhqm4BsCflpWMgo2JCvX8R2v763tOwfN8ZD m5MVw95T7Zs8QH9gO3fEx27+rHrL8N5yVGWJVDevUEpeUOQtmgiBQ9a0QQhmYPxKlQMOGA/pys8bc AIAXvWlHe6hgGdLl6phvgbZGu2q6ByedivC6djct3T+ToWt99YqVU5d8/gYvGEYyEmqwOUBcXqkeN wYEMvrrl1dDItWzzLF8uMrSkl9aPfWACvM4Zv/abLES7R/RjWTfj/zHxFacBoH6S9a8iyUltAS1fT Mwz2JLUIg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1k4YdN-0004hL-Iq; Sat, 08 Aug 2020 23:52:17 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1k4YRC-0002Yx-Gl for linux-nvme@lists.infradead.org; Sat, 08 Aug 2020 23:39:55 +0000 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id AF5F420748; Sat, 8 Aug 2020 23:39:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596929980; bh=lbL7P2kqhPvQnOmd05EN1QjyhRu02oRHZ6JHPQepo6Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HqvPqYUUbFCnnF5ZwEM+eTloJDHGwPvbfoBrZqGPDCfabTMgI6hZTKRJSc98qg97J oliYzVlbTosTRu+l7iYL+7kzvsGCZKb0KXe70GkgOLkhVOcC08NGw4Vo0lbyqEHg/D u0RuKocszO9HpyBlj/MKuEiZ/FrSwlskCAWjjD3c= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 40/40] nvme-multipath: do not fall back to __nvme_find_path() for non-optimized paths Date: Sat, 8 Aug 2020 19:38:44 -0400 Message-Id: <20200808233844.3618823-40-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200808233844.3618823-1-sashal@kernel.org> References: <20200808233844.3618823-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200808_193951_844263_199ED825 X-CRM114-Status: GOOD ( 13.11 ) 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: Sasha Levin , Sagi Grimberg , linux-nvme@lists.infradead.org, Martin Wilck , Hannes Reinecke , Christoph Hellwig 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: Hannes Reinecke [ Upstream commit fbd6a42d8932e172921c7de10468a2e12c34846b ] When nvme_round_robin_path() finds a valid namespace we should be using it; falling back to __nvme_find_path() for non-optimized paths will cause the result from nvme_round_robin_path() to be ignored for non-optimized paths. Fixes: 75c10e732724 ("nvme-multipath: round-robin I/O policy") Signed-off-by: Martin Wilck Signed-off-by: Hannes Reinecke Reviewed-by: Sagi Grimberg Signed-off-by: Christoph Hellwig Signed-off-by: Sasha Levin --- drivers/nvme/host/multipath.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index 38d25d7c6bca3..484aad0d0c9c6 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -275,10 +275,13 @@ inline struct nvme_ns *nvme_find_path(struct nvme_ns_head *head) struct nvme_ns *ns; ns = srcu_dereference(head->current_path[node], &head->srcu); - if (READ_ONCE(head->subsys->iopolicy) == NVME_IOPOLICY_RR && ns) - ns = nvme_round_robin_path(head, node, ns); - if (unlikely(!ns || !nvme_path_is_optimized(ns))) - ns = __nvme_find_path(head, node); + if (unlikely(!ns)) + return __nvme_find_path(head, node); + + if (READ_ONCE(head->subsys->iopolicy) == NVME_IOPOLICY_RR) + return nvme_round_robin_path(head, node, ns); + if (unlikely(!nvme_path_is_optimized(ns))) + return __nvme_find_path(head, node); return ns; } -- 2.25.1 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme