From patchwork Wed Jun 16 13:05:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Lei X-Patchwork-Id: 12325135 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=-10.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 BE2B7C48BE5 for ; Wed, 16 Jun 2021 13:06:24 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) (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 4E04061166 for ; Wed, 16 Jun 2021 13:06:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4E04061166 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=tempfail smtp.mailfrom=dm-devel-bounces@redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1623848783; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding:list-id:list-help: list-unsubscribe:list-subscribe:list-post; bh=SWPCfdH4VYfiAIdFjoT0us/Ev8xfTf3ztBKiaVN920s=; b=HxYpOvtOTdb7GMeez32Cyye9+Bj8nJ3V4sijIa9T8O3/3kHg6xl53NrR55ipvOwuDgEket 4gw+xUn4Dr7vs+oTwCHFKAFJEUHTlpvYMZpmfym+CSG2ORgo1VxhLQz1O3ZJE5FCnlxvWu 0NQEghxl6mLGe+3DKx9CheRedRoMpJQ= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-197-UwJJtHgBPfikBfAAX9bJSA-1; Wed, 16 Jun 2021 09:06:21 -0400 X-MC-Unique: UwJJtHgBPfikBfAAX9bJSA-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id CD885A40C6; Wed, 16 Jun 2021 13:06:15 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 6E9555C233; Wed, 16 Jun 2021 13:06:14 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 023A31809CAD; Wed, 16 Jun 2021 13:06:10 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 15GD68xx001311 for ; Wed, 16 Jun 2021 09:06:08 -0400 Received: by smtp.corp.redhat.com (Postfix) id 98D412E09A; Wed, 16 Jun 2021 13:06:08 +0000 (UTC) Received: from localhost (ovpn-12-48.pek2.redhat.com [10.72.12.48]) by smtp.corp.redhat.com (Postfix) with ESMTP id 806846060F; Wed, 16 Jun 2021 13:05:49 +0000 (UTC) From: Ming Lei To: Jens Axboe , Mike Snitzer Date: Wed, 16 Jun 2021 21:05:29 +0800 Message-Id: <20210616130533.754248-1-ming.lei@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-loop: dm-devel@redhat.com Cc: Ming Lei , linux-block@vger.kernel.org, dm-devel@redhat.com, Jeffle Xu , Christoph Hellwig Subject: [dm-devel] [RFC PATCH 0/4] block/dm: support bio polling X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Hello Guys, Based on Christoph's bio based polling model[1], implement DM bio polling with one very simple approach. Patch 1 adds helper of blk_queue_poll(). Patch 2 reuses .bi_next to bio driver for storing driver data. Patch 3 adds .bio_poll() callback to block_device_operations, so bio driver can implement its own logic for io polling. Patch 4 implements bio polling for device mapper. Any comments are welcome. [1] switch block layer polling to a bio based model v4 https://lore.kernel.org/linux-block/20210615160619.GA32435@lst.de/T/#t Ming Lei (4): block: add helper of blk_queue_poll block: add field of .bi_bio_drv_data to bio block: add ->poll_bio to block_device_operations dm: support bio polling block/blk-core.c | 21 +++++++++----- block/blk-sysfs.c | 4 +-- block/genhd.c | 3 ++ drivers/md/dm-table.c | 24 ++++++++++++++++ drivers/md/dm.c | 59 ++++++++++++++++++++++++++++++++++++--- drivers/nvme/host/core.c | 2 +- include/linux/blk_types.h | 11 +++++++- include/linux/blkdev.h | 3 ++ 8 files changed, 112 insertions(+), 15 deletions(-)