From patchwork Wed Jun 23 07:40:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Lei X-Patchwork-Id: 12339211 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=-11.1 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 BBD87C4743C for ; Wed, 23 Jun 2021 07:42:33 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 62DE7611AC for ; Wed, 23 Jun 2021 07:42:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 62DE7611AC 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=1624434152; 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=yU3Gh06DbY9OqH65n9K4iwlNgu8I949Vu/jUSm5eCzw=; b=Iaanb8YCNzbh0ExIi2rldo5vVA4zATwKT2S9upsdd9b8CweLDWZjnqdPZwDoekc9XE9jey wf8zzfA0K7lHqz7NUEvqXyyOhqcqeDMSHT4grfGRtrE9mxLcmD4LR9Nv74Gc1BeHNahM1r nbruER0r4NcswShgEcsec8OHesPLZ8E= 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-590-Ipq06oOGM7mJmjlDIFTJGQ-1; Wed, 23 Jun 2021 03:41:11 -0400 X-MC-Unique: Ipq06oOGM7mJmjlDIFTJGQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id CE117804140; Wed, 23 Jun 2021 07:41:06 +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 60C6719C66; Wed, 23 Jun 2021 07:41:04 +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 797EE1809C99; Wed, 23 Jun 2021 07:41:00 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 15N7ewGU008251 for ; Wed, 23 Jun 2021 03:40:58 -0400 Received: by smtp.corp.redhat.com (Postfix) id 77C0C5D705; Wed, 23 Jun 2021 07:40:58 +0000 (UTC) Received: from localhost (ovpn-12-52.pek2.redhat.com [10.72.12.52]) by smtp.corp.redhat.com (Postfix) with ESMTP id C58375D6D1; Wed, 23 Jun 2021 07:40:46 +0000 (UTC) From: Ming Lei To: Jens Axboe , Mike Snitzer Date: Wed, 23 Jun 2021 15:40:29 +0800 Message-Id: <20210623074032.1484665-1-ming.lei@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 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] [PATCH V3 0/3] 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 2.84 on 10.5.11.23 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 adds .bio_poll() callback to block_device_operations, so bio driver can implement its own logic for io polling. Patch 3 implements bio polling for device mapper. V3: - patch style change as suggested by Christoph(2/3) - fix kernel panic issue caused by nested dm polling, which is found & figured out by Jeffle Xu (3/3) - re-organize setup polling code (3/3) - remove RFC V2: - drop patch to add new fields into bio - support io polling for dm native bio splitting - add comment Ming Lei (3): block: add helper of blk_queue_poll block: add ->poll_bio to block_device_operations dm: support bio polling block/blk-core.c | 18 +++--- block/blk-sysfs.c | 4 +- block/genhd.c | 2 + drivers/md/dm-table.c | 24 +++++++ drivers/md/dm.c | 131 ++++++++++++++++++++++++++++++++++++++- drivers/nvme/host/core.c | 2 +- include/linux/blkdev.h | 2 + 7 files changed, 170 insertions(+), 13 deletions(-)