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 3AF84C433EF for ; Wed, 6 Jul 2022 15:34:44 +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: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Subject:Cc:To: From:Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=99CJJVFpdXwZKjA8J/WZPHQwZBw2iYXjy5+4OpppZOM=; b=X/5xZz+Q1WYKmKPrv1SGE1upZS ek2AIHIGCv9RVJ0ooUQSAkj9Wgp/AbudMPJcZ6G5T8StLikWZr+Lya9/1GqUbXEzoYuJ3Xp1Gzj+t zc65ec5lzN0uPHKz9o5xy8SjWr5JVxpFNkirl2eCurT2g3pEBJLGagjXvZT02F+ThbJIxEvVHCzmX 3PMP0om/Pdx/IJ0783rfBfg0NG1jGRCCLjfhsDj9BrBDwwV9pzZNisGt++7xd7jP3Mxxd0gnnl3Iv 1ZdM9uJHn7E+Fh1wlE95TNxrLmu1roydsOnH2ndIUy3LT74dUbVkiy69fIH2ojpco6yz7ycfpPIko a/fHoyrg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o972y-00B3tJ-BG; Wed, 06 Jul 2022 15:34:36 +0000 Received: from smtp-out2.suse.de ([195.135.220.29]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o972s-00B3oL-Pg for linux-nvme@lists.infradead.org; Wed, 06 Jul 2022 15:34:32 +0000 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id E9CC21FDC5; Wed, 6 Jul 2022 15:34:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1657121664; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=99CJJVFpdXwZKjA8J/WZPHQwZBw2iYXjy5+4OpppZOM=; b=CzzbxJMzsUpdpgAbuCBHoZFy6NhaP8LgTnNIdWOz30kkPvcZC2AOf3FsFWguO9/kg8USZp XwEu6tOtZ/lB7/LaeLRb56supqWPeWH5AD5Zvjlua9KW9O0unAsr5sGhX3k1ZlySUb1U7O K0Y8X1EFlwHiNxtciwq6FPczLieS3Uw= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1657121664; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=99CJJVFpdXwZKjA8J/WZPHQwZBw2iYXjy5+4OpppZOM=; b=TLxnGJ6mBD6i03pQ24Gv+P/kGoeyoLC8ZGRnkL1DfndU11FVErsRTtASa0Djpg7UcCZZ26 V989lFefUhJljcBA== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 7298713A7D; Wed, 6 Jul 2022 15:34:24 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id KZ3oGICrxWKkYwAAMHmgww (envelope-from ); Wed, 06 Jul 2022 15:34:24 +0000 Date: Wed, 6 Jul 2022 17:37:36 +0200 From: Ismael Luceno To: Ming Lei Cc: Enzo Matsumiya , Sagi Grimberg , Chao Leng , linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org Subject: Re: [PATCH V2 4/5] nvme: quiesce namespace queue in parallel Message-ID: <20220706173736.2891776c@pirotess> In-Reply-To: References: <20211130073752.3005936-1-ming.lei@redhat.com> <20220607132118.0bbb230b@pirotess> Organization: SUSE MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220706_083431_036261_9C186690 X-CRM114-Status: GOOD ( 16.97 ) 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 On Tue, 7 Jun 2022 22:03:40 +0800 Ming Lei wrote: > On Tue, Jun 07, 2022 at 01:21:18PM +0200, Ismael Luceno wrote: > > Hi Ming, > > > > Has this patch been dropped/abandoned? > > Hi Ismael, > > The whole patchset wasn't be accepted if I remember correctly, but > finally we moved srcu out of hctx in another patchset. > > If you think the patch of 'nvme: quiesce namespace queue in parallel' > is useful, please provide a bit info about your case, then we may > figure out similar patch if it is necessary. Chao Leng's outgoing email (lengchao@huawei.com) permission is restricted; I got from him (through a couple of indirections): > Hi, Ismael and Ming, The case: When the multipathing software is used, > if one path failed, fail over to other good path may take long time. > This is important for scenarios that require low latency and high > reliability, such as real-time deals. > > This patch can fix the bug. Same thing he said here: https://lore.kernel.org/linux-nvme/cc732195-c053-9ce4-e1a7-e7f6dcf762ac@huawei.com/ Huawei is still looking for a solution to be merged in mainline. -- Ismael Luceno SUSE L3 Support