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 4F673C433F5 for ; Wed, 2 Mar 2022 00:46:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232388AbiCBAqq (ORCPT ); Tue, 1 Mar 2022 19:46:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33562 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231748AbiCBAqp (ORCPT ); Tue, 1 Mar 2022 19:46:45 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 7028A5F24A for ; Tue, 1 Mar 2022 16:46:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1646181962; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=y9GiUqB4Tu/RCAi83nCkYUeMANtbdClO14LgMa0o8fw=; b=gLhPHeTcL6v+poFDm5eF/0Tlk7u+sOD0an87O968WrsCsQusks0pJmJKJfclCWqzQqLIJv NqKtO/lYMrKgat7VOU+kpjnE1Y1kSb8QKcGLv0MOd+1HsuyIess8jKkHfGUzC0y87xwW3p IvM4C3fvi57arwh0vZMCRyV7sH9lDSA= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-121-DlvziJF8OfC_0xRYsyzhyg-1; Tue, 01 Mar 2022 19:45:55 -0500 X-MC-Unique: DlvziJF8OfC_0xRYsyzhyg-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 1C7361006AA6; Wed, 2 Mar 2022 00:45:53 +0000 (UTC) Received: from T590 (ovpn-8-19.pek2.redhat.com [10.72.8.19]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 98DBC7F7E2; Wed, 2 Mar 2022 00:45:22 +0000 (UTC) Date: Wed, 2 Mar 2022 08:45:17 +0800 From: Ming Lei To: Mike Snitzer Cc: Jens Axboe , linux-block@vger.kernel.org, Jeffle Xu , dm-devel@redhat.com, Hannes Reinecke , Christoph Hellwig Subject: Re: [PATCH V3 0/3] block/dm: support bio polling Message-ID: References: <20210623074032.1484665-1-ming.lei@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Tue, Mar 01, 2022 at 04:19:42PM -0500, Mike Snitzer wrote: > On Mon, Feb 28 2022 at 7:58P -0500, > Ming Lei wrote: > > > On Mon, Feb 28, 2022 at 11:27:44AM -0500, Mike Snitzer wrote: > > > > > > Hey Ming, > > > > > > I'd like us to follow-through with adding bio-based polling support. > > > Kind of strange none of us that were sent this V3 ever responded, > > > sorry about that! > > > > > > Do you have interest in rebasing this patchset (against linux-dm.git's > > > "dm-5.18" branch since there has been quite some churn)? Or are you > > > OK with me doing the rebase? > > > > Hi Mike, > > > > Actually I have one local v5.17 rebase: > > > > https://github.com/ming1/linux/tree/my_v5.17-dm-io-poll > > > > Also one for-5.18/block rebase which is done just now: > > > > https://github.com/ming1/linux/tree/my_v5.18-dm-bio-poll > > > > In my previous test on v5.17 rebase, the IOPS improvement is a bit small, > > so I didn't post it out. Recently not get time to investigate > > the performance further, so please feel free to work on it. > > OK, I've rebased it on dm-5.18. > > Can you please share the exact test(s) you were running? I assume you > were running directly against a request-based device and then > comparing polling perf through dm-linear to the same underlying > request-based device? I run io_uring over dm-linear and dm-stripe, over two nvme disks with 2 poll_queues. IOPS improvement can be observed, but not big. Thanks, Ming