From mboxrd@z Thu Jan 1 00:00:00 1970 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 34F862AE9A for ; Wed, 26 Feb 2025 08:16:00 +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=1740557762; cv=none; b=FZPxq0UIj67DjXqCLRuyax9Ek3iiX4JaBQWRyBUtCsDhr8NIxbubD1CowGGgYTSR8X4ndxO4uESfbOOk5lNQ9Ff/EM/Snkunyjr537l1xVJnz0cf4kKgCNMWZELu71y3F+bBOx7VzpNKTiDbQrGek/0InRCKk/L4/L1QOl52feg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740557762; c=relaxed/simple; bh=nALpxznmBhzULFmfDkpB8aWVcJCEE83NjjXYdSRCF6Q=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=E/9BHUE85ygCIJBbmHDz9nNwTZsiYVo0zdWCFXCWTNzD0fwwV10/SDI7vnMDiTeEILJIMaxvRhMprUACJlWyn7HemDOi4Wr+vP4AUxc7zxPwRlSboON3uKAT1tiGrvYA42/x3kVdeMg8pcb4crGqHfIu53P1wxwMWPZUYadHsKs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none 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=dSH5giKN; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none 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="dSH5giKN" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1740557760; 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=IkUcDBu8Qo7NTXBR3iH6KjBpPvAxntcf8hHlhE3zaYc=; b=dSH5giKNFw+S/pF+G0pWnaRAq1HolnXDuwN1x7Fr1pInmZsMsK99CXBdgq1fW6qX6ipV8W 0kXw7vf7rW7ImGMLpWXSyzLDIDsBUCxKg1i27rQyYfRsceQX7SwIKqDHdwNwXsFWWtHzHP FRTiB1k9YsGlKxeG6SttHXi+NBZkI10= Received: from mx-prod-mc-04.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-313-lMLmeSYlPcSKOrHiRuniNw-1; Wed, 26 Feb 2025 03:15:53 -0500 X-MC-Unique: lMLmeSYlPcSKOrHiRuniNw-1 X-Mimecast-MFC-AGG-ID: lMLmeSYlPcSKOrHiRuniNw_1740557752 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (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-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 7455219039C2; Wed, 26 Feb 2025 08:15:52 +0000 (UTC) Received: from fedora (unknown [10.72.120.27]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 3F7FA1800359; Wed, 26 Feb 2025 08:15:45 +0000 (UTC) Date: Wed, 26 Feb 2025 16:15:39 +0800 From: Ming Lei To: Keith Busch Cc: asml.silence@gmail.com, axboe@kernel.dk, linux-block@vger.kernel.org, io-uring@vger.kernel.org, bernd@bsbernd.com, csander@purestorage.com, Keith Busch Subject: Re: [PATCHv5 09/11] ublk: zc register/unregister bvec Message-ID: References: <20250224213116.3509093-1-kbusch@meta.com> <20250224213116.3509093-10-kbusch@meta.com> Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250224213116.3509093-10-kbusch@meta.com> X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 On Mon, Feb 24, 2025 at 01:31:14PM -0800, Keith Busch wrote: > From: Keith Busch > > Provide new operations for the user to request mapping an active request > to an io uring instance's buf_table. The user has to provide the index > it wants to install the buffer. > > A reference count is taken on the request to ensure it can't be > completed while it is active in a ring's buf_table. > > Signed-off-by: Keith Busch > --- Looks IO_LINK doesn't work, and UNREG_BUF cqe can be received from userspace. It is triggered reliably in the ublk selftests(test_loop_03.sh) I just post out: https://lore.kernel.org/linux-block/20250226081136.2410001-4-ming.lei@redhat.com/T/#m3adfecbfa33de9f9f728ccb4ab1185091be34797 Thanks, Ming