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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 302F8C001DF for ; Wed, 26 Jul 2023 13:23:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=J7+18lmgaMC/YHR66nx0rAFp9jrPLiFlwCw157k1RJw=; b=gp+upa6yp08ZmxiWCXuy/AxUO5 jQDMNZbMhz1sq+hxwkRRl+pr5iD+ZpPTLWtOvQdKCyDbdmz3vX3BV3Kzb5eyKTX8kK6INS+jAfZ98 j/QymEmI4h0rISSLhRCN/UCcGgKQm1ROlICkFxMCGA+pedj9W27OB6KPb4weC17mFijlr9gZ1rAPF 6QldiJZLbMVPBgdwyP2f4sAIO1lSOoRdtSTlQVfFVzgEpDwLI/JtQRniw2gsxm8Fbk+9vpC/11Sl2 XuzzKeYH6RbDxX9aA35n7fmPXxYjM2OB6v9i/3AsLYTuIPOGbf8lCqPN8aIX/BKQAFxWuqfZ5ojtm VE5bNeNA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qOeU3-00AWbB-23; Wed, 26 Jul 2023 13:23:19 +0000 Received: from smtp-out2.suse.de ([195.135.220.29]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qOeU1-00AWZX-2V for linux-nvme@lists.infradead.org; Wed, 26 Jul 2023 13:23:19 +0000 Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out2.suse.de (Postfix) with ESMTP id CDB111F86C; Wed, 26 Jul 2023 13:23:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1690377794; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=J7+18lmgaMC/YHR66nx0rAFp9jrPLiFlwCw157k1RJw=; b=CESHv49oOIQ7v5yoeEKYgLleq8u+vyaqTnJmHHkPzovmtgiWUAaG7UbalYfDYTKol6hN1V XhKtB054eFL9miEE49kbjjqYrXA/HgW1ZDNFCiwGWhP/5waPeqfO2dl8rMrBeGXA4CHNV/ Fv2tvYOi6luPzJlRc0MhdDwd7K2ekCw= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1690377794; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=J7+18lmgaMC/YHR66nx0rAFp9jrPLiFlwCw157k1RJw=; b=JgeKFu66AEuEGYi787MlVXmkC4Vdc1hr9rMA/7NEguW/yTTLBmQvJGbbmRnwt5+18Ldx6Z 1cW8n+rcjHn0qHBA== Received: from adalid.arch.suse.de (adalid.arch.suse.de [10.161.8.13]) by relay2.suse.de (Postfix) with ESMTP id AD53A2C142; Wed, 26 Jul 2023 13:23:14 +0000 (UTC) Received: by adalid.arch.suse.de (Postfix, from userid 16045) id 9372551CA304; Wed, 26 Jul 2023 15:23:14 +0200 (CEST) From: Hannes Reinecke To: Christoph Hellwig Cc: Sagi Grimberg , Keith Busch , Ewan Milne , Uday Shankar , Randy Jennings , linux-nvme@lists.infradead.org, Hannes Reinecke Subject: [PATCH RFC 0/2] nvme-multipath: additional iopolicies Date: Wed, 26 Jul 2023 15:23:03 +0200 Message-Id: <20230726132305.33739-1-hare@suse.de> X-Mailer: git-send-email 2.35.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230726_062317_958271_D4DFFAFC X-CRM114-Status: UNSURE ( 9.52 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org Hi all, as Ewan raised the issue that we are suffering from a buffer-bloat problem when using the round-robin I/O scheduler here are additiona I/O schedulers to improve the situation. The schedulers are untested, and are compile-tested only. I just putting them out here as I had several requests for them; I'm happily improving them upon feedback. Hannes Reinecke (2): nvme-multipath: add additional iopolicies nvme-multipath: add 'latency' iopolicy drivers/nvme/host/core.c | 1 + drivers/nvme/host/multipath.c | 69 ++++++++++++++++++++++++++++++++++- drivers/nvme/host/nvme.h | 8 ++++ 3 files changed, 76 insertions(+), 2 deletions(-) -- 2.35.3