From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) (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 C18C3314B60 for ; Mon, 24 Nov 2025 17:09:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=67.231.153.30 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764004169; cv=none; b=glkAo701G9i4GK+1rnibQr3cbJ8ti48hgP6XsHZ8CBZKH0GuUlweaT4LYcdg7u2lRJoRJ2/rtgJ+LDAWEJDVc2HpAYdWZKuJtsBfWpSbkvcPOX7ybGivLDVgQKBWKzrW3HnpbKUFk0BSl46FuOvfxjSOLyeauwAkBI5RargPdgE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764004169; c=relaxed/simple; bh=uoYeTVO/oNx7JVivr+YReXOWFEc0wL2JJKTh1X9OQXI=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=RW/qDPfNtRl3LOSMMnhWrgSGQ6hPBvJnQAYX6p74yJeL+JHqdP8YsjOTstveT2Qur2GxIfmf6rhBaJdi38LM72tahXczwdDeLM0RVdnBkZhkdp9MYQQRFrL8kGbn8SuX84BcLgNe2WlIJp2tL1vkhoE1mRGKJQd9QKmYeGJrLUM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=meta.com; spf=pass smtp.mailfrom=meta.com; dkim=pass (2048-bit key) header.d=meta.com header.i=@meta.com header.b=rLC20jJd; arc=none smtp.client-ip=67.231.153.30 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=meta.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=meta.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=meta.com header.i=@meta.com header.b="rLC20jJd" Received: from pps.filterd (m0109332.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 5AOEZolC2694097 for ; Mon, 24 Nov 2025 09:09:26 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=meta.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=s2048-2025-q2; bh=t++cTXL1wgV9wEspodYuYmUnkMprtJ4AbLORX5XRU70=; b=rLC20jJdF6wx OqPr3Nc2KYJzeYeyuzvy+94qT/+0Y7UV4HANjIDpCuIG3dYTmP5IoM0TIsdGsAvI fmtzDoUfcBWLWu2NSF1yJxDKsvXsJGgUxSrjOooeTMDql2EQcdaGU2fr1BIKxlCG p+YRVq9dUhEe7TvrpiIGRFl3+TDkUds3giWO8OmHJ0Ez2ubPqqsNZFUxJ4tewdoQ toQgu8QOc+bcqqidLcHta2AXbpY/44l7k5sX9kluzSRv1wpUB4CUTehT3hoezI9M v34dUE9gONSJvsUZ8KL558x60T/+GzFGk/byr/FFb+tT+7wc66I5CZBte1fF859b cbtQ8o79Yg== Received: from maileast.thefacebook.com ([163.114.135.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 4ams9119jt-11 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Mon, 24 Nov 2025 09:09:26 -0800 (PST) Received: from twshared31947.34.frc3.facebook.com (2620:10d:c0a8:fe::f072) by mail.thefacebook.com (2620:10d:c0a9:6f::8fd4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.2.2562.29; Mon, 24 Nov 2025 17:09:16 +0000 Received: by devbig197.nha3.facebook.com (Postfix, from userid 544533) id 4ACE241D0F4D; Mon, 24 Nov 2025 09:09:08 -0800 (PST) From: Keith Busch To: , , , , , CC: Keith Busch Subject: [PATCHv2 1/3] block: remove stacking default dma_alignment Date: Mon, 24 Nov 2025 09:09:01 -0800 Message-ID: <20251124170903.3931792-2-kbusch@meta.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251124170903.3931792-1-kbusch@meta.com> References: <20251124170903.3931792-1-kbusch@meta.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-GUID: nOndVnvgv-09sITKS3H-AKjts-YdkIWm X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTI0MDE1MCBTYWx0ZWRfX0v1BbCG9OOV7 HOtQOgTHFT1/QeyXnsbRtrrZ4cmcnZnZ4f7CF7yLgGhlhtHaYDZ1M6M5RPj5/MOub3Lj+J9Owsk 7EtxZlRVd2rFEL8jLaLV/MKUHKmlzme1rcwtNs8XDK8/6u0a/oAdV05ykkBMoziKhsDMvM3x6UN QfHm4af5eflCiqs7/aq1JEh95Sc9teI54zjiWXEtRkINTvSB0DQ6jctUecsInPjgDyb1RNdwVT9 EI2ml3c40djN/AYInsmxqv5VgrHvFG7A0nUoyokPzETnuFU0mdbMqezAwBhP4PLIs4I/gxtyoU7 HjwkanD9als/JZ98E4IxrZ29N5Q/XGaZZ4e7mpLHLDxLDzouDPEAyJb+gPhJSvH9K2PIa67VWU/ l8+5OIr6KL5CREbCZPG00Rc0QMGP+A== X-Authority-Analysis: v=2.4 cv=BL2+bVQG c=1 sm=1 tr=0 ts=69249146 cx=c_pps a=MfjaFnPeirRr97d5FC5oHw==:117 a=MfjaFnPeirRr97d5FC5oHw==:17 a=6UeiqGixMTsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=wfdUoG3Gv6Dt7mlkbiwA:9 X-Proofpoint-ORIG-GUID: nOndVnvgv-09sITKS3H-AKjts-YdkIWm X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-24_06,2025-11-24_02,2025-10-01_01 From: Keith Busch The dma_alignment becomes 511 anyway if the caller doesn't explicitly set it. But setting this default prevents the stacked device from requesting a lower value even if it can handle lower alignments. Signed-off-by: Keith Busch --- block/blk-settings.c | 1 - 1 file changed, 1 deletion(-) diff --git a/block/blk-settings.c b/block/blk-settings.c index b38e94c85402a..2a7cb46973440 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -41,7 +41,6 @@ void blk_set_stacking_limits(struct queue_limits *lim) lim->physical_block_size =3D SECTOR_SIZE; lim->io_min =3D SECTOR_SIZE; lim->discard_granularity =3D SECTOR_SIZE; - lim->dma_alignment =3D SECTOR_SIZE - 1; lim->seg_boundary_mask =3D BLK_SEG_BOUNDARY_MASK; =20 /* Inherit limits from component devices */ --=20 2.47.3