From patchwork Sat Mar 22 01:26:12 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Lei X-Patchwork-Id: 14026134 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7E27628382 for ; Sat, 22 Mar 2025 01:26:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742606823; cv=none; b=G612G5gFflU+MwfFgarkVQnE0mh7bCcKtrI1cW3iqumuiJDHP34oViYDUy4ifB71AKxaQ+Wi9UEpVZgBfTCrpMv8rRliSc5EYzwy+ge7bMEqfHgXxCkjjN6VQqN2uJ7x/MblqEmxQeSEYCV/kgVkfjje0BWQjpc2gS4Rsi4DwL0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742606823; c=relaxed/simple; bh=yviK+aS42v6UyKRW/66m9FeY2W0+i88S4CfqyMxE22E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hl3JmvbSFvKd3Xr+h6HKAYOV0fb3KJGNlgWjYrKbtrTdBhGsCv94f2MEGNaN1IG+JjbawIvasx2VmRWCuFnoJR4QlZzgdZHSyiPlTRoQHkTpSzMzFOX/ndVFwPg5DZAYdsNHvks5GR3MbrTKDcQsLzzfG1QsuzdYS5I+9FYW6fk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=ZBbXPjVg; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ZBbXPjVg" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1742606818; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VJLTL3U2JgfRrp6bRWSk0rx4EAlBpAq5p4h/hpiHBPg=; b=ZBbXPjVgZNPc5z+Kx9Sb6CNG9GDCFqd19AnAxaQ4tO39j2KOf2muFIGvQCCk+JtuQpacKb N7iYxt4jpH6Wro38q/oNge0ktIXCMzPX3vPHwB6GDuFvJ82Lea4i4DzMX73iiNgywFDWkL W3aGWkN+0VWWxxddeaYwuT9W/XtOvHQ= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-7-2cNij-bGNIWore8l9jEnTg-1; Fri, 21 Mar 2025 21:26:50 -0400 X-MC-Unique: 2cNij-bGNIWore8l9jEnTg-1 X-Mimecast-MFC-AGG-ID: 2cNij-bGNIWore8l9jEnTg_1742606806 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 8350C196D2CC; Sat, 22 Mar 2025 01:26:46 +0000 (UTC) Received: from localhost (unknown [10.72.120.2]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id ECC23195609D; Sat, 22 Mar 2025 01:26:44 +0000 (UTC) From: Ming Lei To: Jens Axboe , linux-block@vger.kernel.org Cc: Christoph Hellwig , Jooyung Han , Mike Snitzer , zkabelac@redhat.com, dm-devel@lists.linux.dev, Alasdair Kergon , Mikulas Patocka , Ming Lei Subject: [PATCH V3 3/5] loop: move command blkcg/memcg initialization into loop_queue_work Date: Sat, 22 Mar 2025 09:26:12 +0800 Message-ID: <20250322012617.354222-4-ming.lei@redhat.com> In-Reply-To: <20250322012617.354222-1-ming.lei@redhat.com> References: <20250322012617.354222-1-ming.lei@redhat.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Move loop command blkcg/memcg initialization into loop_queue_work, and prepare for supporting to handle loop io command by IOCB_NOWAIT. Reviewed-by: Christoph Hellwig Signed-off-by: Ming Lei --- drivers/block/loop.c | 32 +++++++++++++++++--------------- 1 file changed, 17 insertions(+), 15 deletions(-) diff --git a/drivers/block/loop.c b/drivers/block/loop.c index 419ca675342a..c14da87efb07 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -877,11 +877,28 @@ static inline int queue_on_root_worker(struct cgroup_subsys_state *css) static void loop_queue_work(struct loop_device *lo, struct loop_cmd *cmd) { + struct request __maybe_unused *rq = blk_mq_rq_from_pdu(cmd); struct rb_node **node, *parent = NULL; struct loop_worker *cur_worker, *worker = NULL; struct work_struct *work; struct list_head *cmd_list; + /* always use the first bio's css */ + cmd->blkcg_css = NULL; + cmd->memcg_css = NULL; +#ifdef CONFIG_BLK_CGROUP + if (rq->bio) { + cmd->blkcg_css = bio_blkcg_css(rq->bio); +#ifdef CONFIG_MEMCG + if (cmd->blkcg_css) { + cmd->memcg_css = + cgroup_get_e_css(cmd->blkcg_css->cgroup, + &memory_cgrp_subsys); + } +#endif + } +#endif + spin_lock_irq(&lo->lo_work_lock); if (queue_on_root_worker(cmd->blkcg_css)) @@ -1926,21 +1943,6 @@ static blk_status_t loop_queue_rq(struct blk_mq_hw_ctx *hctx, break; } - /* always use the first bio's css */ - cmd->blkcg_css = NULL; - cmd->memcg_css = NULL; -#ifdef CONFIG_BLK_CGROUP - if (rq->bio) { - cmd->blkcg_css = bio_blkcg_css(rq->bio); -#ifdef CONFIG_MEMCG - if (cmd->blkcg_css) { - cmd->memcg_css = - cgroup_get_e_css(cmd->blkcg_css->cgroup, - &memory_cgrp_subsys); - } -#endif - } -#endif loop_queue_work(lo, cmd); return BLK_STS_OK;