From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 6F73842069 for ; Fri, 7 Feb 2025 22:14:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738966466; cv=none; b=KdFCy4GorQd2AVFrjexmT4u1qZaXW6f5znQmnwSY75638L+slAH2is8UVD4Tsa35XhVXG5CWtZaAaRIbxDdY7as9ploWLyu5PwM7W5FFvsIQKv7hD+1weyVBbcyZz+M07XhrIYlSDhJsu5JSPw858mAeiOTzQE0Fxsa1ksa9OjU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738966466; c=relaxed/simple; bh=v3E7aOAj1RolbZ+G8rpmqWsn67q8WYxDr1SczyjymHg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ZuObcAQTlOAFlOmpMfFfSLLRogABi3QiU0N3QSao79TRQXx2SuScrhLGKv/3ovWkESogGg0UVZYv5g9vazeMfQJ2GBqMQNmraItnBKep1Ar80MlkVIE9DJPnXq3cqOkNKsvdPF5uLlDju5HmhQjA6siBJIm4bupBIjuf2Yf/R2E= 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=E2uuwQm/; arc=none smtp.client-ip=170.10.133.124 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="E2uuwQm/" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1738966463; 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=5JQYDZ5jzno7rrMD91/odghBo6lSgHHkIDBVq0SzOmo=; b=E2uuwQm/mr1g3VqgOQiMVlMqFODlGZ9wQXuRE/fOVoJ0OqFQH+aANoDebiD17brTtOMy57 WBA4r3Hfe/szKhynPjBy0Qqnd+OnP87HHrUwuczS0DhTCZwKRZoUWLDl6KR/i1Juefb442 k2mQfP6HWtnQTETXnmNWzxc8N5q+QAA= 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-194-QyO-n5Z1MT68fscLH0adPg-1; Fri, 07 Feb 2025 17:14:19 -0500 X-MC-Unique: QyO-n5Z1MT68fscLH0adPg-1 X-Mimecast-MFC-AGG-ID: QyO-n5Z1MT68fscLH0adPg 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-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 437711956095; Fri, 7 Feb 2025 22:14:16 +0000 (UTC) Received: from bmarzins-01.fast.eng.rdu2.dc.redhat.com (unknown [10.6.23.247]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 56BCE1800360; Fri, 7 Feb 2025 22:14:14 +0000 (UTC) Received: from bmarzins-01.fast.eng.rdu2.dc.redhat.com (localhost [127.0.0.1]) by bmarzins-01.fast.eng.rdu2.dc.redhat.com (8.18.1/8.17.1) with ESMTPS id 517MEDga725105 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Fri, 7 Feb 2025 17:14:13 -0500 Received: (from bmarzins@localhost) by bmarzins-01.fast.eng.rdu2.dc.redhat.com (8.18.1/8.18.1/Submit) id 517MECmM725090; Fri, 7 Feb 2025 17:14:12 -0500 Date: Fri, 7 Feb 2025 17:14:12 -0500 From: Benjamin Marzinski To: Zhang Yi Cc: linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-block@vger.kernel.org, dm-devel@lists.linux.dev, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, hch@lst.de, tytso@mit.edu, djwong@kernel.org, yi.zhang@huawei.com, chengzhihao1@huawei.com, yukuai3@huawei.com, yangerkun@huawei.com Subject: Re: [RFC PATCH v2 4/8] dm: add BLK_FEAT_WRITE_ZEROES_UNMAP support Message-ID: References: <20250115114637.2705887-1-yi.zhang@huaweicloud.com> <20250115114637.2705887-5-yi.zhang@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-fsdevel@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: <20250115114637.2705887-5-yi.zhang@huaweicloud.com> X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 On Wed, Jan 15, 2025 at 07:46:33PM +0800, Zhang Yi wrote: > From: Zhang Yi > > Set the BLK_FEAT_WRITE_ZEROES_UNMAP feature on stacking queue limits by > default. This feature shall be disabled if any underlying device does > not support it. > > Signed-off-by: Zhang Yi > --- > drivers/md/dm-table.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c > index bd8b796ae683..58cce31bcc1e 100644 > --- a/drivers/md/dm-table.c > +++ b/drivers/md/dm-table.c > @@ -598,7 +598,8 @@ int dm_split_args(int *argc, char ***argvp, char *input) > static void dm_set_stacking_limits(struct queue_limits *limits) > { > blk_set_stacking_limits(limits); > - limits->features |= BLK_FEAT_IO_STAT | BLK_FEAT_NOWAIT | BLK_FEAT_POLL; > + limits->features |= BLK_FEAT_IO_STAT | BLK_FEAT_NOWAIT | BLK_FEAT_POLL | > + BLK_FEAT_WRITE_ZEROES_UNMAP; > } > dm_table_set_restrictions() can set limits->max_write_zeroes_sectors to 0, and it's called after dm_calculate_queue_limits(), which calls blk_stack_limits(). Just to avoid having the BLK_FEAT_WRITE_ZEROES_UNMAP still set while a device's max_write_zeroes_sectors is 0, it seems like you would want to clear it as well if dm_table_set_restrictions() sets limits->max_write_zeroes_sectors to 0. -Ben > /* > -- > 2.39.2 >